The Open Civil Engineering Journal最新文献

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Mechanical and Chemical Behaviour of Water Treatment Sludge and Soft Soil Mixtures for Liner Production 用于衬垫生产的水处理污泥和软土混合物的力学和化学特性
The Open Civil Engineering Journal Pub Date : 2022-11-15 DOI: 10.2174/18741495-v16-e221115-2022-27
L. Marchiori, André Studart, A. Albuquerque, L. Pais, M. Boscov, V. Cavaleiro
{"title":"Mechanical and Chemical Behaviour of Water Treatment Sludge and Soft Soil Mixtures for Liner Production","authors":"L. Marchiori, André Studart, A. Albuquerque, L. Pais, M. Boscov, V. Cavaleiro","doi":"10.2174/18741495-v16-e221115-2022-27","DOIUrl":"https://doi.org/10.2174/18741495-v16-e221115-2022-27","url":null,"abstract":"\u0000 \u0000 Clay-basedand geosynthetic liners are generally used as hydraulic barrier in solid waste disposal facilities, mining tailing ponds, and soil-based wastewater treatment technologies, avoiding leaching of hazardous compounds to subsoil and groundwater. Water treatment sludge (WTS) is a water treatment plant (WTP) residue which due to hydraulic properties seems to decrease the permeability in WTS:soil mixtures and may become an alternative material to produce sustainable waste-based liners.\u0000 \u0000 \u0000 \u0000 This research aims to characterize and analyse physical, chemical and mechanical parameters of a WTS, a soft soil and four mixtures WTS: soil following 05:95%, 10:90%, 15:85%, 20:80% ratios. Therefore, evaluate the best ratio for producing waste-based liners for civil engineering applications.\u0000 \u0000 \u0000 \u0000 The geotechnical characterization performing –particle size distribution, specific surface, specific gravity, Atterberg limits, and Normal Proctor compaction; chemical composition due to oxides analyses through X-ray fluorescence (XRF), mineralogical description by X-ray diffraction (XRD) and scanning electron microscope (SEM) with energy dispersive spectrometer (EDS) coupled for imaging; and mechanical behavior performing - –oedometric consolidation, consolidated undrained (CU) triaxial, and falling head permeability. Tests were conducted for all mixtures, the soil, and WTS, with pointed out exceptions.\u0000 \u0000 \u0000 \u0000 The results showed that the fine-grained WTS filled the soil voids but rearranging soil particles, thus, compacted dry unit weight decreased with WTS addition, probably due to its chemical composition with high amounts of aluminium and silica. The compressibility of the compacted mixtures did not differ significantly compared to the soil, while the shear strength analysis demonstrated a reduction in cohesion, and an increase in the effective internal friction angle proportional to WTS addition. Hydraulic conductivity increased with WTS until 10% of residue introduction, decreased for 15%, and continued to decrease for 20%, reaching optimum permeability in 15%.\u0000 \u0000 \u0000 \u0000 The incorporation of WTS can improve or just do not interfere at soil’s properties to be used as liner material in solid wastes storage facilities, mining ponds and soil-based wastewater treatment technologies. Furthermore, 15% of WTS (15:85% mixture) incorporation provided the best results meeting the hydraulic conductivity requirement for liner materials, i.e., equal, or lower than 10-9 m/s. The reuse of WTS for this purpose would allow producing a new added-value material in the scope of circular economy.\u0000","PeriodicalId":350575,"journal":{"name":"The Open Civil Engineering Journal","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121258588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Analysis of Mechanical Behavior of Special Concentrically Braced Single-Story Frames with Ductile Casting Steel Connectors 含铸钢连接件的特殊同心支撑单层框架受力性能分析
The Open Civil Engineering Journal Pub Date : 2022-11-15 DOI: 10.2174/18741495-v16-e221115-2022-42
C. Chen, Z. Yin, Qiang Wang
{"title":"The Analysis of Mechanical Behavior of Special Concentrically Braced Single-Story Frames with Ductile Casting Steel Connectors","authors":"C. Chen, Z. Yin, Qiang Wang","doi":"10.2174/18741495-v16-e221115-2022-42","DOIUrl":"https://doi.org/10.2174/18741495-v16-e221115-2022-42","url":null,"abstract":"\u0000 \u0000 The special concentrically braced frame (SCBF) is an aseismic structure, but its bracing system exhibits brittle failure and premature buckling connected with the weld fracture of the gusset plate and the post-buckling of the braces; thus, maximizing the role of energy dissipation is difficult.\u0000 \u0000 \u0000 \u0000 Here, this paper proposes a system of special concentrically braced single-story frames with ductile casting steel connectors. The large inelastic deformation of the bracing system is mainly concentrated in the ductile casting connectors under the earthquake, and the degree of buckling can be reduced. The finite element model of a single-story frame with special central support and casting steel connectors was established by ABAQUS. Monodirectional loading simulations were conducted on 12 groups of specimens with different parameters, then the deformation trend, stress distribution, initial stiffness, and ductility of the specimens were analyzed.\u0000 \u0000 \u0000 \u0000 The seismic behavior of the frames was evaluated by the variable parameters of the width-thickness ratio of the energy dissipation plate and stiffener, the length of the energy dissipation segment of the casting connectors and the overstrength coefficient. The casting steel connector conducts the main connectors that exhibit good ductile and initial stiffness.\u0000 \u0000 \u0000 \u0000 The study results provided direct evidence that the seismic performance of specimens is closely associated with the length of the energy dissipation segment of the casting connector and the overstrength coefficient of axial force. Also, the stress distribution, initial stiffness, and ductility of the members can be independently controlled by reasonably designing the casting connector.\u0000","PeriodicalId":350575,"journal":{"name":"The Open Civil Engineering Journal","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127698773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Comparative Assessment of Regularized Regression Techniques for Modeling the Mechanical Properties of Rubberized Concrete 橡胶混凝土力学性能建模的正则回归技术比较评价
The Open Civil Engineering Journal Pub Date : 2022-11-04 DOI: 10.2174/18741495-v16-e2208170
B. Yasin, Faroq Maraqa, E. Al-Sahawneh, Jamal Al Adwan, Yazan Alzubi
{"title":"A Comparative Assessment of Regularized Regression Techniques for Modeling the Mechanical Properties of Rubberized Concrete","authors":"B. Yasin, Faroq Maraqa, E. Al-Sahawneh, Jamal Al Adwan, Yazan Alzubi","doi":"10.2174/18741495-v16-e2208170","DOIUrl":"https://doi.org/10.2174/18741495-v16-e2208170","url":null,"abstract":"\u0000 \u0000 Over the last few decades, many researchers have investigated the properties and behavior of concrete mixtures incorporating rubber-based solid wastes as a partial substitution of natural aggregates. Within this context, they have conducted experimental studies and developed numerical models that simulate the nature of rubberized concrete. Some of these mathematical simulations were intended to provide a rapid mixture of proportioning approaches and property estimation methods. Currently, it is believed that regression analysis provides an effective tool to simply construct a mathematical expression that models a set of data. For that reason, multiple linear regression was extensively utilized in predicting rubberized concrete properties in the literature. However, the performances of regularized regression analysis approaches were not evaluated even though they provide better alternatives to traditional regression methods in terms of controlling the overfitting issue.\u0000 \u0000 \u0000 \u0000 This study aims to assess the performance of Ridge, Lasso, and elastic net regression models in estimating the compressive and tensile strengths, and modulus of elasticity of rubberized concrete. Additionally, it intends to benchmark their capabilities against the traditional multiple linear regression method.\u0000 \u0000 \u0000 \u0000 Multiple linear regression, Ridge regression, Lasso regression, ElasticNet regression, Bayesian ridge regression, Stochastic gradient descent, Huber regression, and Quantile regression methods were used in the study.\u0000 \u0000 \u0000 \u0000 \u0000 In general, the research findings illustrated the superior performance of regression assessment in modeling the mechanical properties of rubberized concrete.\u0000 \u0000 \u0000 \u0000 Indeed rubberized concrete mechanical properties can be better modeled using regularized regression techniques, such as ElasticNet-based SGD compared to traditional methods, such as MLR.\u0000","PeriodicalId":350575,"journal":{"name":"The Open Civil Engineering Journal","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114370442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Research on Shrinkage and Shrinkage Models of Reinforced Concrete Specimens 钢筋混凝土试件收缩及收缩模型研究
The Open Civil Engineering Journal Pub Date : 2022-11-03 DOI: 10.2174/18741495-v16-e221103-2022-37
Guilin Zhang, Pang Chen, Xiaoyu Si, Jingde Wang, Yang Han
{"title":"Research on Shrinkage and Shrinkage Models of Reinforced Concrete Specimens","authors":"Guilin Zhang, Pang Chen, Xiaoyu Si, Jingde Wang, Yang Han","doi":"10.2174/18741495-v16-e221103-2022-37","DOIUrl":"https://doi.org/10.2174/18741495-v16-e221103-2022-37","url":null,"abstract":"\u0000 \u0000 It is very important to accurately predict the shrinkage of reinforced concrete specimens to ensure the structural safety.\u0000 \u0000 \u0000 \u0000 Therefore, 36 reinforced concrete specimens shrinkage tests with the size of 150mm×150mm×450mm were made in this paper to study the effects of four concrete strengths grade and three longitudinal reinforcement ratios on the shrinkage of reinforced concrete specimens.\u0000 \u0000 \u0000 \u0000 The results show that the concrete strength increased from 35MPa to 58.2MPa, and the shrinkage rate of concrete decreased by about 30%., the ratio of reinforcement increased from 0 to 2.01%, and the shrinkage rate of concrete decreased about 40%.\u0000 \u0000 \u0000 \u0000 The experimental results are compared with existing shrinkage models of reinforced concrete, and a modified shrinkage calculation model of reinforced concrete is proposed.\u0000","PeriodicalId":350575,"journal":{"name":"The Open Civil Engineering Journal","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117108075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimate Final Cost of Roads Using Support Vector Machine 用支持向量机估计道路的最终成本
The Open Civil Engineering Journal Pub Date : 2022-10-31 DOI: 10.2174/18741495-v16-e221031-2022-52
Musaab Hasan, Oday Hammody, Khaldoon Satea Albayati
{"title":"Estimate Final Cost of Roads Using Support Vector Machine","authors":"Musaab Hasan, Oday Hammody, Khaldoon Satea Albayati","doi":"10.2174/18741495-v16-e221031-2022-52","DOIUrl":"https://doi.org/10.2174/18741495-v16-e221031-2022-52","url":null,"abstract":"The cost overrun in road construction projects in Iraq is one of the major problems that face the construction of new roads. To enable the concerned government agencies to predict the final cost of roads, the objective this paper suggested is to develop an early cost estimating model for road projects using a support vector machine based on (43) sets of bills of quantity collected in Baghdad city in Iraq. As cost estimates are required at the early stages of a project, consideration was given to the fact that the input data for the support vector machine model could be easily extracted from sketches or the project's scope definition. The data were collected from contracts awarded by the Mayoralty of Baghdad for completed projects between 2010-2013. Mathematical equations were constructed using the Support Vector Machine Algorithm (SMO) technique. An average of accuracy (AA) (99.65%) and coefficient of determination (R2) (97.63%) for the model were achieved by the created prediction equations.","PeriodicalId":350575,"journal":{"name":"The Open Civil Engineering Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131992696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Implementation of Mechanistic-Empirical Pavement Design Guide against Indonesian Conditions using Arizona Calibration 采用亚利桑那校准技术实施印尼条件下的机械经验路面设计指南
The Open Civil Engineering Journal Pub Date : 2022-10-26 DOI: 10.2174/18741495-v16-e221026-2022-45
B. S. Subagio, Aldo Budi Prayoga, Siti Raudhatul Fadilah
{"title":"Implementation of Mechanistic-Empirical Pavement Design Guide against Indonesian Conditions using Arizona Calibration","authors":"B. S. Subagio, Aldo Budi Prayoga, Siti Raudhatul Fadilah","doi":"10.2174/18741495-v16-e221026-2022-45","DOIUrl":"https://doi.org/10.2174/18741495-v16-e221026-2022-45","url":null,"abstract":"\u0000 \u0000 As a transportation infrastructure that connects one area to another, roads have an essential role in economic and social growth, together with establishing a location that may improve the quality of life in the surrounding community. For this reason, it is necessary to perform road maintenance when the structural or functional capacity of the road is inadequate, one of which is by overlaying the road.\u0000 \u0000 \u0000 \u0000 The main objective of this research is to determine the thickness of the flexible pavement overlay and subsequently examine the damage model produced by the 2015 MEPDG method with Arizona calibration. This study also proposes recommendations for implementing the 2015 MEPDG procedures in Indonesian settings.\u0000 \u0000 \u0000 \u0000 The thickness of the road overlay can be designed through a mechanistic-empirical approach, which is commonly referred to as the Mechanistic-Empirical Pavement Design Guide (MEPDG). The back calculation on the BAKFAA program was utilized to examine the existing situation. At the same time, a stress-strain analysis was performed using the KENPAVE software to calculate the response of the pavement structure.\u0000 \u0000 \u0000 \u0000 The 2015 MEPDG with Arizona calibration by controlling fatigue cracking has resulted in an overlay thickness of 180 mm. In addition, the damage model was obtained for each type of road failure and can be beneficial in estimating the future IRI value.\u0000 \u0000 \u0000 \u0000 The damage model generated from the 2015 MEPDG procedure is specific to the types of road damage, which can eventually be utilized to predict the future IRI value. It also encompasses local and global calibration variables, such as adjustment factors for its implementation in road pavement conditions in Indonesia. The MEPDG application can be simplified by shortening the mechanistic analysis process, along with reducing traffic variations and the level of detail in the daily climate analysis.\u0000","PeriodicalId":350575,"journal":{"name":"The Open Civil Engineering Journal","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121486284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Experimental and Numerical Investigations on an Organic Phase Change Material Incorporated Cool Concrete Pavement 有机相变材料掺入冷混凝土路面的试验与数值研究
The Open Civil Engineering Journal Pub Date : 2022-10-26 DOI: 10.2174/18741495-v16-e221026-2022-ht31-3975-2
B. Anupam, U. Sahoo, P. Rath
{"title":"Experimental and Numerical Investigations on an Organic Phase Change Material Incorporated Cool Concrete Pavement","authors":"B. Anupam, U. Sahoo, P. Rath","doi":"10.2174/18741495-v16-e221026-2022-ht31-3975-2","DOIUrl":"https://doi.org/10.2174/18741495-v16-e221026-2022-ht31-3975-2","url":null,"abstract":"\u0000 \u0000 Traditionally, cool pavements have been designed as reflective pavements and evaporative pavements etc. Though the reflective pavements reduce the pavement surface temperature significantly, they increase glare, thermal burden on pedestrian traffic, and temperature of nearby buildings. In case of evaporative pavements, absence of water, reduced thermal inertia and solar reflection result in a higher pavement temperature. As a result, there has been a pressing need to investigate on new low side-effect cool pavement options.\u0000 \u0000 \u0000 \u0000 The aim of the study is to analyze the effect of phase change material (PCM) incorporation on the thermal performance of concrete pavements and to develop a total enthalpy-based numerical heat transfer model for such cool pavements.\u0000 \u0000 \u0000 \u0000 A paraffin-based organic PCM with a melting point of 42 to 45 °C was used in this work and expanded clay aggregate (ECA) was used as encapsulation medium. Concrete slabs without and with incorporation of PCM impregnated ECAs were cast and thermocouples were implanted in the concrete to monitor the pavement temperature continuously. A total enthalpy-based numerical heat transfer model was developed to predict the thermal performance of such cool concrete pavements.\u0000 \u0000 \u0000 \u0000 The PCM incorporation resulted in a reduction of 2.24 °C in the annual average pavement surface temperature with a maximum reduction of 4.12 °C.\u0000 \u0000 \u0000 \u0000 PCM incorporation is an effective method to reduce pavement surface temperature during daytime making the pavements cooler. Increasing the porosity of the encapsulating medium and also increasing the thermal conductivity of the concrete slab enhances the cooling potential. However, the thermal characteristics of the encapsulating material may be neglected as their impact is less on the cooling potential.\u0000","PeriodicalId":350575,"journal":{"name":"The Open Civil Engineering Journal","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130519172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental Investigation of the Forklift Truck Impact Effect on CFS Pallet Racks 叉车对CFS托盘架冲击效应的实验研究
The Open Civil Engineering Journal Pub Date : 2022-10-26 DOI: 10.2174/18741495-v16-e221026-2022-11
F. Gusella, M. Orlando
{"title":"Experimental Investigation of the Forklift Truck Impact Effect on CFS Pallet Racks","authors":"F. Gusella, M. Orlando","doi":"10.2174/18741495-v16-e221026-2022-11","DOIUrl":"https://doi.org/10.2174/18741495-v16-e221026-2022-11","url":null,"abstract":"\u0000 \u0000 Storage pallet racks are commonly formed by Cold-Formed-Steel (CFS) members and used worldwide to store goods on pallets. The main racking system is denoted as “selective pallet racking”. This racking system is one pallet deep and is separated by aisles, allowing for each pallet, stored on horizontal beams, to be always accessible. Steel racking systems are frequently subjected to accidental impact forces from operating forklift trucks. If international racking design codes provide an arbitrary value of impact force to design members, several impacts can produce damages, which can lead to system failure, highlighting the fundamental role played by monitoring.\u0000 \u0000 \u0000 \u0000 Results of an experimental campaign on a full-size selective rack are presented. The investigated rack is subjected to the impact of a forklift truck and hammer test at different points. The propagation of the acceleration among adjacent bracing frames is investigated with the magnitude of the recorded strains in structural members.\u0000 \u0000 \u0000 \u0000 Results highlight that an accelerometer every two spans can establish whether the monitored racking system is accidentally hit. Compressed diagonal and tensile diagonal work in parallel. Only one diagonal brace, every two spans, can be monitored through a strain gauge to establish the forklift truck impact point and to estimate the stress distribution on adjacent members.\u0000 \u0000 \u0000 \u0000 The study suggests an optimization in the number, type and position of accelerometers and strain gauges in monitoring racking systems to identify forklift truck impact and its effects.\u0000","PeriodicalId":350575,"journal":{"name":"The Open Civil Engineering Journal","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124916568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Marine Environment Exposure on the Engineering Properties of Steel-Concrete Interface 海洋环境暴露对钢-混凝土界面工程性能的影响
The Open Civil Engineering Journal Pub Date : 2022-10-26 DOI: 10.2174/18741495-v16-e221026-2022-ht31-3975-5
S. Goudar, E. P. Sumukh, B. B. Das
{"title":"Influence of Marine Environment Exposure on the Engineering Properties of Steel-Concrete Interface","authors":"S. Goudar, E. P. Sumukh, B. B. Das","doi":"10.2174/18741495-v16-e221026-2022-ht31-3975-5","DOIUrl":"https://doi.org/10.2174/18741495-v16-e221026-2022-ht31-3975-5","url":null,"abstract":"\u0000 \u0000 A detailed and reformed service life prediction model needs to be developed by considering the non-uniform distribution of porous zone as well as the non-uniform distribution of corrosion products layer.\u0000 \u0000 \u0000 \u0000 The microstructure of the steel-concrete interface (SCI) plays an important role in corrosion initiation and concrete cover cracking. The porous zone around SCI is one of the vital engineering properties that influence the service life of corroding reinforced concrete structures in service life prediction models.\u0000 \u0000 \u0000 \u0000 The SCI properties are sensitive to the sample preparation technique of reinforced concrete (RC) samples for studying with the aid of scanning electron microscopy (SEM). A simple step-wise sample preparation technique of RC samples for SEM analysis is proposed where there is minimal damage to the properties of SCI. The development, distribution, and propagation of corrosion products at SCI are investigated for RC samples exposed to the marine environment for different exposure periods. The service life of RC structures was assessed through experimentally determined porous zone thickness (PZT) values. Assuming a uniform and constant value of PZT and uniform distribution of corrosion products around SCI might lead to variation or misinterpretation of the service life of structures. The same is explored in the present study.\u0000 \u0000 \u0000 \u0000 In this research investigation, backscattered electron images were obtained for the analysis of porous zone thickness around SCI. The distribution and propagation of corrosion products around SCI was investigated for different mineral admixed reinforced concrete samples exposed to the marine environment. Also, experimentally measured porous zone thickness values were used, and the time from corrosion initiation to corrosion cracking was estimated using a service life prediction model.\u0000 \u0000 \u0000 \u0000 Results show that porous zone thickness is not uniform around SCI. Once the corrosion is initiated, the corrosion products start to accumulate in the porous region of SCI. Further, the non-uniform porous zone thickness directly influenced the non-uniform distribution of corrosion products. Assuming a constant or uniform porous zone thickness and uniform distribution of corrosion products around SCI leads to misinterpretation of the service life of corroding reinforced concrete structures.\u0000 \u0000 \u0000 \u0000 The porous zone thickness values around the steel-concrete interface and corrosion current density play an important role in predicting the service life of reinforced concrete structures exposed to the marine environment.\u0000","PeriodicalId":350575,"journal":{"name":"The Open Civil Engineering Journal","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129508546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Seismic Hazard Maps of Bengkulu City, Indonesia Considering Probabilistic Spectral Response for Medium and Stiff Soils 考虑中硬土概率谱响应的印尼明古鲁市地震危险性图
The Open Civil Engineering Journal Pub Date : 2022-10-21 DOI: 10.2174/18741495-v16-e221021-2022-49
L. Z. Mase, S. Keawsawasvong
{"title":"Seismic Hazard Maps of Bengkulu City, Indonesia Considering Probabilistic Spectral Response for Medium and Stiff Soils","authors":"L. Z. Mase, S. Keawsawasvong","doi":"10.2174/18741495-v16-e221021-2022-49","DOIUrl":"https://doi.org/10.2174/18741495-v16-e221021-2022-49","url":null,"abstract":"\u0000 \u0000 This paper presents the extended work of a seismic hazard map for Bengkulu City, Indonesia. In this current study, seismic hazard maps are generated by considering site variations in Bengkulu City, Indonesia.\u0000 \u0000 \u0000 \u0000 First, site investigation data is collected. Furthermore, the probabilistic spectral response for Bengkulu City is analysed. The spectral matching method is implemented to obtain relevant ground motion considering the most dominant earthquake scenario that occurred. A seismic ground response analysis is conducted to obtain several ground motion parameters, such as peak ground acceleration, spectral acceleration values at 0.2 s and 1 s, and ground motion amplification.\u0000 \u0000 \u0000 \u0000 The results show that peak ground acceleration in the study area is generally within the range of 0.5 to 0.6g. It indicates that most sites in Bengkulu city could undergo strong motion. Spectral accelerations at 0.2 s and 1 s are also dominantly found in the range of 0.9 to 1.2g and the range of 0.5 to 0.7g. Generally, ground motion in the study area could amplify up to 1.1 to 1.5.\u0000 \u0000 \u0000 \u0000 Spectral acceleration curve for site classes in Bengkulu City shows a similar trend to other spectral accelerations. It indicates that spectral acceleration proposed in this study could be implemented in the study area.\u0000","PeriodicalId":350575,"journal":{"name":"The Open Civil Engineering Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129185873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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