Revista de la Construccion最新文献_第2页

A decision tree-based damage estimation approach for preliminary seismic assessment of reinforced concrete buildings 基于决策树的钢筋混凝土建筑物地震预估损伤估计方法

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2023-01-01 DOI: 10.7764/rdlc.22.1.5

Ayşe Elif Özsoy Özbay

{"title":"A decision tree-based damage estimation approach for preliminary seismic assessment of reinforced concrete buildings","authors":"Ayşe Elif Özsoy Özbay","doi":"10.7764/rdlc.22.1.5","DOIUrl":"https://doi.org/10.7764/rdlc.22.1.5","url":null,"abstract":"This study aims to introduce an earthquake-induced damage classification approach for seismic vulnerability assessment of reinforced concrete buildings. Through the use of the damage data collected from post-earthquake inspections after the 2003 Bingöl Earthquake in Turkey, two models were constructed by the decision tree classification technique considering nine building-specific features as the estimation variables in the analysis. The first model was developed for the prediction of the observed damage states of the buildings, whereas the second one concerning the life safety level assessment, was proposed for distinguishing the extremely vulnerable buildings for seismic prioritization. In the validation process, the leave-one-out cross validation technique was adopted to deal with the small sample size of the building inventory. Among the estimation variables, the priority index and the existence of short columns were found to have the highest importance in classification. Results have revealed that the proposed model for life safety level assessment was capable of discriminating the cluster of severely damaged and collapsed buildings from the entire database with an accuracy of 70.59%. Hence, the damage classification approach adopted in this study has the potential for improving effective tools for seismic risk assessment of the existing buildings.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71306221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 on mechanical properties of HSSCC containing waste steel fibers obtained from end-of-life tires 含废旧轮胎废钢纤维的HSSCC力学性能试验研究

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2023-01-01 DOI: 10.7764/rdlc.22.1.87

Kutalmış Recep Akça, M. İpek, Sevgi Çelenk, Aykut Karabulak

{"title":"Experimental investigation on mechanical properties of HSSCC containing waste steel fibers obtained from end-of-life tires","authors":"Kutalmış Recep Akça, M. İpek, Sevgi Çelenk, Aykut Karabulak","doi":"10.7764/rdlc.22.1.87","DOIUrl":"https://doi.org/10.7764/rdlc.22.1.87","url":null,"abstract":"In this study, use of end-of-life tires (ELTs) in self-consolidating concretes (SCC), which enable higher rates of fiber use than conventional concrete due to its superior flow properties, for the elimination of the environmental negative impacts and recycling of them were aimed. Besides, it is aimed to investigate the behavior of waste steel wires with different aspect ratio obtained from different types of tires, contrary to what is mostly researched in the literature. Therefore, bead, cord and base wires, obtained from tires, were used in high-strength self-consolidating concrete (HSSCC) production as fiber reinforcement. Fresh and hardened state properties of the waste wire-reinforced (1-2-3%) samples of different sizes that were produced, were compared with industrial steel-reinforced and non-fibrous samples. In this regard, slump flow and T50 durations were determined, compression and bending tests were performed. Significant improvements in the mechanical properties of conventional concretes were observed with the use of waste wire. Using the optimum ratio of waste wire, an increase of approximately 102% in flexural strength and 14% in compressive strength was observed compared to the reference specimen. Aspect ratio was recognized as one of the most effective factor on optimum fiber content. Moreover, experimental results were analyzed with \"paired sample t-test\", and it was seen that there were no considerable differences in the mechanical properties of the samples in which industrial fiber and waste-wire had been used. Besides, cost analysis was carried out to assess the economic benefits of the use of waste tire wires in the concrete industry.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71306332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Incorporating vegetal fibers for sustainable sandy soil 将植物纤维纳入可持续沙质土壤

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2023-01-01 DOI: 10.7764/rdlc.22.1.135

Hachemi Adda Berkane, N. Della, Sidali Denine, Mahdi Missoum Benziane

引用次数: 0

Prediction of the mechanical properties of concrete incorporating simultaneous utilization of fine and coarse recycled aggregate 细粗再生骨料同时使用混凝土力学性能预测

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2023-01-01 DOI: 10.7764/rdlc.22.1.178

Herbert Sinduja Joseph, Thamilselvi Pachiappan, Siva Avudaiappan, P. Guindos

{"title":"Prediction of the mechanical properties of concrete incorporating simultaneous utilization of fine and coarse recycled aggregate","authors":"Herbert Sinduja Joseph, Thamilselvi Pachiappan, Siva Avudaiappan, P. Guindos","doi":"10.7764/rdlc.22.1.178","DOIUrl":"https://doi.org/10.7764/rdlc.22.1.178","url":null,"abstract":"The mechanical properties of concrete were optimized using response surface methodology (RSM) and fuzzy logic. The aggregate portion of the concrete was replaced with recycled aggregate to address the environmental problems caused by building demolition wastes. The essential key factors that influenced the suitability of recycled aggregate in concrete applications are the compressive strength (CS), flexural strength (FS), and the split tensile strength (STS). The experiments were designed with nine combinations of two input factors (percentage of coarse and fine recycled aggregates) at different levels 30, 60, and 100%. Furthermore, optimization techniques were used to determine the strong correlations between the variables and the mechanical parameters. Such optimization techniques helped to identify the optimistic maximum strength for replacing 44% coarse and 65% fine recycled aggregate. Using RSM, the maximum strength results were found to be: CS at 7, 28, 56, and 90 days were 23.61, 35.04, 40.02, and 43.63 N/mm2, respectively, FS 3.6 N/mm2 and STS 2.0 N/mm2. The maximum strength parameters were found using fuzzy logic: CS at 7, 28, 56, and 90 days were 23.5, 35.8, 41, and 46.7 N/mm2, respectively, FS 4.13 N/mm2 and STS 1.97 N/mm2. Such optimization can be carried out to lower the material wastage, energy consumption, and expenses for the production.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71305645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Durability performance of alkali-activated concretes exposed to sulfuric acid attack 碱活化混凝土在硫酸侵蚀下的耐久性性能

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2023-01-01 DOI: 10.7764/rdlc.22.1.16

A. Niş, Melis Bilenler Altundal

{"title":"Durability performance of alkali-activated concretes exposed to sulfuric acid attack","authors":"A. Niş, Melis Bilenler Altundal","doi":"10.7764/rdlc.22.1.16","DOIUrl":"https://doi.org/10.7764/rdlc.22.1.16","url":null,"abstract":"In this research, chemical durability performances of the alkali-activated slag (AAS), 50% ground granulated blast furnace slag and 50% fly ash (AFS), ordinary Portland cement (OPC), and geopolymer (GPC) concretes were investigated thoroughly under 5% sulfuric acid attack. All alkali-activated concrete specimens were produced considering the minimum binder content of 360 kg/m3 and the maximum alkali activator to binder ratio of 0.45 according to the XA3 environment given in EN 206-1 standard for OPC concrete. The visual inspection, weight change and compressive strength tests were performed to understand the influence of sulfuric acid attack on the resulting performances. Also, scanning electron microscope (SEM) and energy dispersive X-ray spectrometry (EDS) analyses were performed to examine the morphological variations in micro-scale. The mechanical performances and durability of alkali-activated concretes were also compared to the OPC concrete for structural utilization. The results revealed that AFS specimens showed the best durability, while GPC specimens exhibited the poorest durability. SEM/EDS results pointed out that AFS specimens exhibited denser and less porous microstructure, and the reductions in Al/Si and Ca/Si atomic ratios were observed under 5% sulfuric acid attack. In contrast, GPC specimens showed less dense and porous microstructure, and high aluminum leaching was observed. In addition, the wider interconnected macro cracks and high calcium leaching were observed in the AAS samples under 5% sulfuric acid attack. Finally, the AAS and AFS specimens can be utilized in structural applications, while GPC specimens should not be used with a minimum binder content proposed by EN 206-1 standard.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71305632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Water absorbing polymer balls as internal water curing agent in concrete to support hydration reaction 吸水聚合物球作为混凝土内水固化剂，支持水化反应

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2022-01-01 DOI: 10.7764/rdlc.21.1.83

Vijayalakshmi Ramalingam, Kamalesh Ramesh, Madhankumar Duraipandi, Jayesh U, Selvam Kuppusamy

{"title":"Water absorbing polymer balls as internal water curing agent in concrete to support hydration reaction","authors":"Vijayalakshmi Ramalingam, Kamalesh Ramesh, Madhankumar Duraipandi, Jayesh U, Selvam Kuppusamy","doi":"10.7764/rdlc.21.1.83","DOIUrl":"https://doi.org/10.7764/rdlc.21.1.83","url":null,"abstract":"polymer balls can supply water to the mortar or concrete mixture when added during the initial stage of mixing the concrete ingredients. It supplies the absorbed water during the hydration process of concrete as an internal water source. Water Absorption polymers (WAP) can absorb water up to hundred times of their own weight. Using this idea, the concrete mixture has been prepared with WAP and without WAP (Control) and subjected to air curing and water curing respectively. In this work WAP has been added in two different percentages i.e., 2.5% and 5% of the weight of cement, and the hardened concrete has been subjected to compression load. The mechanical strength and the volumetric change of these mixes were compared with the water cured control mix (Concrete without WAP). From the result, it was concluded that the air-cured specimen showed strength of 30.37 MPa and 28.74 MPa for 2.5% and 5% of addition of WAP balls respectively. This strength is about 99% and 94.2% of the strength of control water-cured specimen. Results also showed that specimens in air behave for expansion while samples in the water acted for shrinkage. Experiment results also showed that air-cured concrete specimens with WAP balls show significant strength gain over a period of 84 days compared to water-cured normal concrete mix samples.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71304830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of local pozzolans and lime additions on the mineralogical, physical and mechanical properties of compressed earth blocks in Argentina 阿根廷当地火山灰和石灰添加量对压缩土块矿物学、物理和力学性质的影响

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2022-01-01 DOI: 10.7764/rdlc.21.2.248

Santiago Cabrera, K. Elert, Anabela G. Guilarducci, Andrea Margasin

{"title":"The effect of local pozzolans and lime additions on the mineralogical, physical and mechanical properties of compressed earth blocks in Argentina","authors":"Santiago Cabrera, K. Elert, Anabela G. Guilarducci, Andrea Margasin","doi":"10.7764/rdlc.21.2.248","DOIUrl":"https://doi.org/10.7764/rdlc.21.2.248","url":null,"abstract":"The purpose of this research is to evaluate the mineralogical, physical, and mechanical properties of compressed earth blocks (CEB) stabilized with lime and mineral admixtures easily obtained in Argentina: natural pozzolans and brick powder. the admixture mineralogical composition and their pozzolanic potential as well as the development of hydraulic phases upon reaction with calcium hydroxide (lime) were determined, emphasizing the formation of hydrated cementing compounds. Samples with different percentages of lime and mineral additions were prepared in order to test their compressive strength, wet erosion resistance, and water absorption, and contrasting the results with those of their counterparts stabilized exclusively with lime or cement. The results obtained allow us to affirm that both the brick powder and the pozzolan used have pozzolanic properties and, in combination with calcium hydroxide, form amorphous phases of C-(A)-S-H. However, the use of small amounts of both additions in combination with hydrated air lime in the manufacture of CEB, compared to CEB samples stabilized only with hydrated air lime, adversely affected their physical and mechanical properties.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71304854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Torsional performance of reinforced concrete beam with carbon fiber and aramid fiber laminates 碳纤维和芳纶层合板钢筋混凝土梁的抗扭性能

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2022-01-01 DOI: 10.7764/rdlc.21.2.329

S. Shanmugasundaram, R. Mohanraj, S. Senthilkumar, P. Padmapoorani

{"title":"Torsional performance of reinforced concrete beam with carbon fiber and aramid fiber laminates","authors":"S. Shanmugasundaram, R. Mohanraj, S. Senthilkumar, P. Padmapoorani","doi":"10.7764/rdlc.21.2.329","DOIUrl":"https://doi.org/10.7764/rdlc.21.2.329","url":null,"abstract":"In the presented research paper, investigated the torsional performance of reinforced concrete beams with light emissions grade of cement utilizing Carbon fiber and its relative investigation with aramid fiber, for its torsional conduct, utilizing both exploratory and insightful strategies. A distinctive example of its strips folded over RC beams and the torsional conduct of these restrengthened beams is considered. Carbon fiber (CF) is utilized as outside support. Reinforced concrete beam retrofitted with CF tried for torsional disappointment utilizing lever arms exposed to torque. The beams have dimensions of 150mm in width and 200mm in depth and 1 m long, as planned according to IS456-2000. Three bars are intended for a twist. Steel has a stronger ultimate strength but a lower density than aramid FRP, as well as being easier to install and requiring no interim support until it reaches its full strength. The impact of various sorts and designs of CF on the initial stage of breaking load, extreme load conveying limit, and disappointment method of the beam are thought about and its relative examination utilizing finite element programming with aramid fiber gives a better outcome for additional investigation.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71305131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Integration of discrete event simulation with other modeling techniques to simulate construction engineering and management: an overview 离散事件模拟与其他建模技术的集成，以模拟建筑工程和管理:概述

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2022-01-01 DOI: 10.7764/rdlc.21.2.338

F. Araya

{"title":"Integration of discrete event simulation with other modeling techniques to simulate construction engineering and management: an overview","authors":"F. Araya","doi":"10.7764/rdlc.21.2.338","DOIUrl":"https://doi.org/10.7764/rdlc.21.2.338","url":null,"abstract":"Although Discrete Event Simulation (DES) has been the preferred simulation technique in construction operation studies, it suffers from limitations, such as narrowed focus at the operational level. To minimize the effect of DES limitations, researchers have proposed the integration of DES with other simulation techniques, such as agent-based modeling (ABM), system dynamics (SD), and virtual environments (VE). However, limited studies have discussed whether this integration process minimizes DES’ limitations and to what extent. This study summarizes 99 journal manuscripts in the existing literature published between 2010-2020, focusing on integrating DES with ABM, SD, and VE. This study found that the integration of DES with ABM, SD, and VE addressed multiple of DES’ limitations, namely, the lack of human behaviors in process-oriented modeling, the limited strategic perspective, and challenges related to the verification and validation of DES models’ outputs. Ultimately, this study calls for future studies to evaluate the simultaneous integration of DES, ABM, and SD modeling techniques so the complexity of construction projects can be truly accounted for, as comprehensive simulation tools will require the integration of multiple methods to counterbalance their limitations.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71305214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on behavior and seismic performance of reduced beam sections 减截面梁的性能及抗震性能研究

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2022-01-01 DOI: 10.7764/rdlc.21.2.427

İbrahim Ermeydan, Alirıza İlker Akgönen

{"title":"Investigation on behavior and seismic performance of reduced beam sections","authors":"İbrahim Ermeydan, Alirıza İlker Akgönen","doi":"10.7764/rdlc.21.2.427","DOIUrl":"https://doi.org/10.7764/rdlc.21.2.427","url":null,"abstract":"Engineers prefer reduced beam section (RBS) connections in steel moment frames built in earthquake zones due to their many benefits. The RBS shape design significantly affects joint behavior. This paper examines the effect of RBS geometry on joint behavior and seismic performance using ANSYS finite element analysis software. RBS connections are investigated using European profiles and steel grades due to the limited number of studies using European profiles in the literature. The simulation study is carried out in three stages. In the first stage, an experimental study in the literature is simulated, and the reliability of the created finite element model is checked. In the second stage, geometric changes are made to the verified numerical model, and the obtained new models are examined under monotonic loading to observe the effect of RBS geometry on moment-rotation behavior. In the third stage, the effect of the change in the RBS geometry on the seismic performance is investigated under cyclic loading. As a result of the study, the effects of various changes made in the RBS geometry on the joint behavior and seismic performance are presented graphically. By using the results of the analysis under monotonic loading, the regression analysis is carried out, and the formulas giving the elastic-plastic stiffness, elastic moment capacity, and elastic rotation angle of the support are derived. Besides, simulation models show that the RBS joints' seismic performance met the minimum criteria specified in the earthquake code (AISC/ANSI 341-16) when European steel profiles and quality are applied.","PeriodicalId":54473,"journal":{"name":"Revista de la Construccion","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71305450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1