Periodica Polytechnica-Civil Engineering最新文献_第3页

Deflection of a Partially Composite Beam Considering the Effect of Shear Deformation 考虑剪切变形影响的部分组合梁挠度

IF 1.8 4区工程技术

Periodica Polytechnica-Civil Engineering Pub Date : 2023-08-25 DOI: 10.3311/ppci.22319

Hamid Hamli Benzahar, M. Chabaat, H. Ayas

引用次数: 0

Optimizing Landfill Capacity: A Numerical Study of the Slope Inclination Variation Impact on Landfill Storage Capacity and Its influence on the Safety Factors under Different Models 填埋场容量优化:不同模型下边坡倾角变化对填埋场库容影响及其对安全系数影响的数值研究

IF 1.8 4区工程技术

Periodica Polytechnica-Civil Engineering Pub Date : 2023-08-25 DOI: 10.3311/ppci.22790

Feten Chihi, G. Varga

{"title":"Optimizing Landfill Capacity: A Numerical Study of the Slope Inclination Variation Impact on Landfill Storage Capacity and Its influence on the Safety Factors under Different Models","authors":"Feten Chihi, G. Varga","doi":"10.3311/ppci.22790","DOIUrl":"https://doi.org/10.3311/ppci.22790","url":null,"abstract":"As an attempt to enhance landfill capacity and extend its lifespan, this research explores the effect of slope inclination on landfill storage capacity and its implementation on the safety factors using numerical simulations. A geometric approach was used to determine the capacity change with inclination, and a new probabilistic calculation method, which accounts for the heterogeneity of waste layers, was employed to analyze the safety factor for different slope angles. Over 100 conducted calculations for each inclination were used to investigate the effect of slope variation on landfill safety. The results show that increasing inclination leads to a significant increase in landfill capacity. The safety factor results indicate that the conventional method, assuming homogenous waste, classifies 1:3 and 1:2 slopes as safe, while the new suggested method showed that a 2:3 inclination could be considered safe, especially since the calculation is not considering the safety-enhancing effect of daily cover layers. This study highlights the importance of considering the heterogeneity of waste layers in safety factor analysis, and the use of multi-layered nonhomogeneous calculation method, which provides more flexibility in design parameters. This research presents a significant step forward in constructing safe and cost-effective landfills. The use of a new probabilistic calculation method in designing landfills leads to more accurate and reliable results while maintaining safety standards. This research has important implications for the design and management of landfills and can be used as a guide for future studies in this field.\u0000 ","PeriodicalId":49705,"journal":{"name":"Periodica Polytechnica-Civil Engineering","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90978650","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

Physics-inspired Metaheuristics for Construction Site Layout Planning Problem 建筑工地布局规划问题的物理启发元启发式方法

IF 1.8 4区工程技术

Periodica Polytechnica-Civil Engineering Pub Date : 2023-08-24 DOI: 10.3311/ppci.22902

A. Kaveh, A. A. Shirzadi Javid, Y. Vazirinia

引用次数: 0

Influence of Climate Change on Probability of Carbonation-Induced Corrosion Initiation 气候变化对碳致腐蚀起始概率的影响

IF 1.8 4区工程技术

Periodica Polytechnica-Civil Engineering Pub Date : 2023-08-23 DOI: 10.3311/ppci.22101

Mostafa Hassan, L. Amleh

{"title":"Influence of Climate Change on Probability of Carbonation-Induced Corrosion Initiation","authors":"Mostafa Hassan, L. Amleh","doi":"10.3311/ppci.22101","DOIUrl":"https://doi.org/10.3311/ppci.22101","url":null,"abstract":"The consequences of climate change on infrastructure, particularly reinforced concrete (RC) bridges, have rapidly increased in recent years. These consequences are primarily driven by the surge in CO2 emissions, which significantly impacts the carbonation depth of RC structures. This study aims to investigate the probability of carbonation-induced corrosion initiation (PCICI) in RC bridge elements. To achieve this, the investigation incorporates a range of concrete covers, varying from 30 to 50 mm, and considers different concrete mixes with cement contents of 400, 350, and 250 kg/m3. The investigation utilizes the Monte-Carlo simulation method, considering different representative concentration pathways (RCPs) to account for two emission scenarios: RCP2.6 (low emission scenario) and RCP8.5 (high emission scenario). By analyzing projected CO2 concentrations and maximum temperature, the study provides insights into the potential corrosion initiation risks in RC bridges. The findings indicated a significant 66.3% increase in PCICI for a cement content of 250 kg/m3, compared to 400 kg/m3, under the RCP8.5 scenario, specifically when using a concrete cover of 30 mm by 2100. The study also revealed that the PCICI approached an approximate value of zero when concrete covers were set at 45 and 50 mm regardless of the variations in cement contents and the duration considered, for both the RCP2.6 and RCP8.5 scenarios.","PeriodicalId":49705,"journal":{"name":"Periodica Polytechnica-Civil Engineering","volume":"57 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76876123","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 and Numerical Behavior of Basalt Fiber Reinforced Short Concrete Columns Under Axial Loading 玄武岩纤维增强混凝土短柱轴向荷载作用下的试验与数值分析

IF 1.8 4区工程技术

Periodica Polytechnica-Civil Engineering Pub Date : 2023-08-16 DOI: 10.3311/ppci.22070

Dhiyaa H. Mohammed, Adil M. Jabbar, Qais A. Hasan

{"title":"Experimental and Numerical Behavior of Basalt Fiber Reinforced Short Concrete Columns Under Axial Loading","authors":"Dhiyaa H. Mohammed, Adil M. Jabbar, Qais A. Hasan","doi":"10.3311/ppci.22070","DOIUrl":"https://doi.org/10.3311/ppci.22070","url":null,"abstract":"This paper presents experimental and numerical investigations to reveal effecting of incorporating basalt fibers into a concrete matrix on the structural behavior and loading capacity of axially loaded short columns. Six volume fractions of chopped basalt fibers are added to the same concrete mixture to prepare six identically reinforced columns. The results illustrate that the bonding forces between microfilaments and matrix increase to provide good internal confinement for concrete ingredients, which enhances compressive strength and column loading capacity. The 0.3 % basalt fiber awarded the best compressive strength, while 0.15 % and 0.3 % awarded the best load capacity to the column. The Addition of basalt fibers delays cracking to increase the cracking load by about 50 % more than no fiber column, which indicates that it needs more energy to overcome the bonding strength between filaments and matrix. At the ultimate state, the loading capacity increases by 15 % and 17 % for 0.15 % and 0.3 % of basalt fibers and by 10 % and 12 % for 0.45% and 0.6% of basalt fiber. The 0.75 % decreased compressive strength by about 6 % but raised the column's ultimate load by 18 %. Therefore, basalt fiber benefits the cracking load more than the maximum load. The finite element showed approaching the peak load in numerical and experimental results. The longitudinal rebars and ties do not yield at the ultimate state. Increasing the reinforcement ratio raises loading capacity while lowering the yield stress of bars minimizes the maximum load.","PeriodicalId":49705,"journal":{"name":"Periodica Polytechnica-Civil Engineering","volume":"24 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79719211","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 Research and FE Model of a Bolted Steel-CLT Composite Connection 钢- clt螺栓复合连接试验研究及有限元模型

IF 1.8 4区工程技术

Periodica Polytechnica-Civil Engineering Pub Date : 2023-08-16 DOI: 10.3311/ppci.22752

M. Milić, Todor Vacev, P. Petronijević, Ivan Nešović, Andrija Zorić, Stepa Paunović, Biljana Matejević Nikolić

{"title":"Experimental Research and FE Model of a Bolted Steel-CLT Composite Connection","authors":"M. Milić, Todor Vacev, P. Petronijević, Ivan Nešović, Andrija Zorić, Stepa Paunović, Biljana Matejević Nikolić","doi":"10.3311/ppci.22752","DOIUrl":"https://doi.org/10.3311/ppci.22752","url":null,"abstract":"Steel-timber composite structures have numerous advantages compared to steel only and timber only structures. One of the most important parts of a composite structure is the composite connection. Object of this research was a steel-CLT composite connection consisting of a steel profile, a cross-laminated timber (CLT) panel and a bolt with nut and washer. Aim of the research was to develop an efficient finite element (FE) model of a bolted steel-CLT composite connection and to validate it experimentally. The research process consisted of several steps: experimental testing of the considered connection using asymmetrical push-out test, numerical modelling and analysis of the connection using Finite Element Method (FEM), validation of the numerical model using experimental results, and parametric study of the proposed numerical model. For numerical analysis, an innovative method for timber modelling has been proposed. The comparison between the experimental and numerical research results demonstrated that the proposed numerical model was convenient for practical application in structure analyses. The parametric study showed that, in some cases, atypical failure modes of the connection occurred. Based on registered behavior, a recommendation is given to calculate the load capacity of the connection integrally, taking into account both the primary (Johansen’s) and the secondary (rope effect) part of the connection strength, instead partially, as proposed by EN standards.","PeriodicalId":49705,"journal":{"name":"Periodica Polytechnica-Civil Engineering","volume":"14 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79243739","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

Fuzzy Structural Analysis Using Improved Jaya-based Optimization Approach 基于改进jaya优化方法的模糊结构分析

IF 1.8 4区工程技术

Periodica Polytechnica-Civil Engineering Pub Date : 2023-08-16 DOI: 10.3311/ppci.22818

H. Pham, B. Nguyen

引用次数: 0

Thermomechanical Analysis of Glass Powder Based Eco-concrete Panels: Limitations and Performance Evaluation 玻璃粉基生态混凝土板的热力学分析:局限性与性能评价

IF 1.8 4区工程技术

Periodica Polytechnica-Civil Engineering Pub Date : 2023-07-31 DOI: 10.3311/ppci.22781

Abdelmoutalib Benfrid, Abdeldjalil Benbakhti, Zouaoui R. Harrat, Mohammed Chatbi, B. Krour, M. B. Bouiadjra

{"title":"Thermomechanical Analysis of Glass Powder Based Eco-concrete Panels: Limitations and Performance Evaluation","authors":"Abdelmoutalib Benfrid, Abdeldjalil Benbakhti, Zouaoui R. Harrat, Mohammed Chatbi, B. Krour, M. B. Bouiadjra","doi":"10.3311/ppci.22781","DOIUrl":"https://doi.org/10.3311/ppci.22781","url":null,"abstract":"This article presents a comprehensive investigation into the thermomechanical analysis of glass powder as an additive in concrete. The efficient Eshelby's model is utilized to determine the relevant composite properties, considering the spherical shape of the glass powder. A higher-order shear deformation plate theory is employed to theoretically simulate the reinforced concrete panel, ensuring accuracy and simplicity. Equilibrium equations are derived using the virtual work concept, and energy equations are derived using Hamilton's principle. Navier's analytical techniques are applied to obtain closed-form solutions for simply supported plates. A comprehensive parametric study is conducted, analyzing the impact of factors such as glass powder volume, geometric parameters, and thermal loading on the thermomechanical behavior of the panel. The findings highlight the challenges associated with using glass powder in concrete for thermomechanical applications and suggest the need for alternative approaches to optimize its effectiveness in such scenarios, also the study provides first-time numerical results that serve as guidelines for further research on reinforced concrete.","PeriodicalId":49705,"journal":{"name":"Periodica Polytechnica-Civil Engineering","volume":"45 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89726976","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

Overconsolidated Stress and Strain Condition of Pavement Layers as a Result of Preloading during Construction 施工中预压引起的路面层超固结应力应变状况

IF 1.8 4区工程技术

Periodica Polytechnica-Civil Engineering Pub Date : 2023-07-27 DOI: 10.3311/ppci.22258

M. Vamos, J. Szendefy

{"title":"Overconsolidated Stress and Strain Condition of Pavement Layers as a Result of Preloading during Construction","authors":"M. Vamos, J. Szendefy","doi":"10.3311/ppci.22258","DOIUrl":"https://doi.org/10.3311/ppci.22258","url":null,"abstract":"The stiffness and resilient behavior of soils are essential input properties when designing pavements. There are many material models that take into account the stress dependency of stiffness. In pavements, horizontal stresses generally differ from conventional soils because of the preloading of the pavement during construction. In this research, standardized pavement cross sections were analyzed using finite element software with advanced soil constitutive models, and equations describing their behavior were calibrated with the back-analysis of in-situ and laboratory measurements. The pavement was modelled as comprising 4 layers: asphalt pavement, well graded crushed stone base course, granular subbase course and fine-medium sandy subgrade. The ratio of horizontal and vertical stresses σ3/σ1 and strains ε3/ε1 were investigated and assessed in the function of depth and loading, and recommendations are given for the description of these functions. The recommendations give useful input data for future practical applications such as simplified calculation methods that are capable of determining the permanent settlement beneath flexible pavements without the use of finite element methods.","PeriodicalId":49705,"journal":{"name":"Periodica Polytechnica-Civil Engineering","volume":"435 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82637637","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

Optimization of the Engineering Properties of Cement Concrete Containing Gravel and Waste Rock Using Dense Packing and Response Surface Methodology 用致密充填和响应面法优化含碎石和废石水泥混凝土的工程性能

IF 1.8 4区工程技术

Periodica Polytechnica-Civil Engineering Pub Date : 2023-07-26 DOI: 10.3311/ppci.21908

V. M. Nguyen, Minh Nguyen Van, V. Nguyen

{"title":"Optimization of the Engineering Properties of Cement Concrete Containing Gravel and Waste Rock Using Dense Packing and Response Surface Methodology","authors":"V. M. Nguyen, Minh Nguyen Van, V. Nguyen","doi":"10.3311/ppci.21908","DOIUrl":"https://doi.org/10.3311/ppci.21908","url":null,"abstract":"This study introduces a novel methodology for optimizing the distribution of aggregate particles in concrete. Utilizing locally available materials like gravel and waste rock is explored as a sustainable alternative to conventional materials like mountain rock and river sand, which are depleting. Determining the maximum bulk density involves an efficient process of gradually adding different particle sizes of gravel and waste rock to the mixture. The vibrational compaction of the container aids in identifying the optimally combined percentages of these aggregates. Besides, the study also addresses the issue of porosity in concrete. The response surface methodology is employed to optimize the mixture proportions for concrete, considering important factors such as workability, compressive strength, flexural strength, and elastic modulus. This response surface methodology allows for the development of mathematical models that aid in determining the optimal mix ratios. By exploiting the potential of gravel and waste rock, this study aims to procedure cement concrete containing gravels and waste rock (WR) with required compressive strength from 30 MPa to 35 MPa based on reasonable aggregate particle distribution in combination with response surface methodology (RSM) and minimize the disposal of non-biodegradable waste, thereby reducing the environmental pollution. Additionally, utilizing locally available materials helps to effectively use the region's resources for concrete production, promoting sustainability and reducing dependency on scarce resources. The proposed method presents a promising approach to optimizing aggregate distribution in concrete while considering the environmental and resource constraints specific to the Northwest region of Vietnam.","PeriodicalId":49705,"journal":{"name":"Periodica Polytechnica-Civil Engineering","volume":"24 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75415236","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