Periodica Polytechnica Civil Engineering最新文献

Unlocking Resilience: Examining the Influence of Fluid Viscous Dampers on Seismic Performance of Reinforced-concrete Structures in Earthquake-prone Regions 开启复原力：研究流体粘性阻尼器对地震多发地区钢筋混凝土结构抗震性能的影响

Periodica Polytechnica Civil Engineering Pub Date : 2024-07-25 DOI: 10.3311/ppci.37748

Asma Belbachir, Nesrine Belbachir, Sadek Bahar, Abdeldjalil Benbakhti, Zouhir S. M. Louhibi, S. Amziane

{"title":"Unlocking Resilience: Examining the Influence of Fluid Viscous Dampers on Seismic Performance of Reinforced-concrete Structures in Earthquake-prone Regions","authors":"Asma Belbachir, Nesrine Belbachir, Sadek Bahar, Abdeldjalil Benbakhti, Zouhir S. M. Louhibi, S. Amziane","doi":"10.3311/ppci.37748","DOIUrl":"https://doi.org/10.3311/ppci.37748","url":null,"abstract":"In high seismicity regions like Algeria, the seismic performance of structures is of paramount importance. This study investigates the effectiveness of fluid viscous dampers (FVDs) in enhancing the seismic resilience of a 12-story (G+12) reinforced concrete structure. By utilizing Etabs and SeismoSoft softwares, a comparative analysis is conducted between two structural configurations: one with a traditional fixed base and another incorporating fluid viscous dampers. The incorporation of FVDs aims to mitigate the seismic impact by dissipating energy, thereby reducing base shear, displacement, and acceleration during seismic events. The structure's location in a high seismicity zone necessitates robust design strategies to ensure safety and structural integrity. This paper presents a comprehensive analysis of the seismic response and advanced simulation framework providing detailed results on key parameters. The findings highlight the potential of fluid viscous dampers to significantly improve the seismic performance of reinforced concrete structures, offering a promising solution for earthquake-prone areas.","PeriodicalId":512221,"journal":{"name":"Periodica Polytechnica Civil Engineering","volume":"53 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141803716","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 Key Shear Factors on the Shear Performance of Ultra-high Performance Fibre Reinforced Concrete Beam Containing Coarse Aggregate 关键剪切因素对含粗集料的超高性能纤维加固混凝土梁剪切性能的影响

Periodica Polytechnica Civil Engineering Pub Date : 2024-07-22 DOI: 10.3311/ppci.36817

Abutu Simon John Smith, Gang Xu

{"title":"Influence of Key Shear Factors on the Shear Performance of Ultra-high Performance Fibre Reinforced Concrete Beam Containing Coarse Aggregate","authors":"Abutu Simon John Smith, Gang Xu","doi":"10.3311/ppci.36817","DOIUrl":"https://doi.org/10.3311/ppci.36817","url":null,"abstract":"This paper assesses the effect of direct and indirect factors on the shear performance of ultra-high performance fibre reinforced concrete beam containing coarse aggregate (UHPFRC-CA) using four point loading arrangement. The obtained results were used to categorize UHPFRC-CA beam's failure mode, establish the influence of key factors on shear performance, and develop UHPFRC-CA beam's compression zone resistance and first shear cracking load equations whose results were compared with those from this research, other researchers and existing equation. Findings revealed that UHPFRC-CA beam fails in cable stayed, shear partial compression, cable stayed-diagonal tension and cable stayed-partial shear tension. Shear span-depth ratio (a/d) has the most influence on the beams' failure mode. Higher percentage volume of steel fibre improves ultimate load capacity and midspan displacement resistance at failure load. Hooked-end steel fibre improves deformation (crack width and midspan displacement at failure load) resistance. Higher a/d is more beneficial to midspan displacement resistance at failure load than load capacity; while lower stirrup spacing leads to higher midspan displacement at failure load. Finally, the developed first shear cracking load equation can adequately capture the true first shear cracking load of UHPFRC-CA beam; and the developed compression zone resistance equation can be conveniently used to represent the joint contribution of compressive strength and fibre factor to UHPFRC-CA beam's shear resistance.","PeriodicalId":512221,"journal":{"name":"Periodica Polytechnica Civil Engineering","volume":"6 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141817427","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

Numerical Procedure for Solving the Nonlinear Behaviour of a Spherical Absorber 解决球形吸收器非线性行为的数值程序

Periodica Polytechnica Civil Engineering Pub Date : 2024-07-22 DOI: 10.3311/ppci.25903

Marek Kawulok, Martin Čermák, Stanislav Pospíšiil, D. Juračka

引用次数: 0

Meso-scale Study of Bond Behavior between Ribbed Steel Rebar and Fiber-reinforced Cementitious Composite Considering Rebar Rib Geometry 考虑钢筋肋几何形状的带肋钢筋与纤维增强水泥基复合材料粘结行为中尺度研究

Periodica Polytechnica Civil Engineering Pub Date : 2024-07-16 DOI: 10.3311/ppci.28772

Reza Akbarifar, Alireza Mortezaei, Ali Babaei

{"title":"Meso-scale Study of Bond Behavior between Ribbed Steel Rebar and Fiber-reinforced Cementitious Composite Considering Rebar Rib Geometry","authors":"Reza Akbarifar, Alireza Mortezaei, Ali Babaei","doi":"10.3311/ppci.28772","DOIUrl":"https://doi.org/10.3311/ppci.28772","url":null,"abstract":"This study aims to develop a meso-scale finite element approach to investigate the pull-out behavior of ribbed steel rebar and fiber-reinforced cement composites. We considered separately the three phases of steel fibers, cement composite matrix, and rebar within the meso-scale finite element model. A random distribution of fibers was generated in the matrix based on the geometric characteristics of the fibers and their volume fraction. By employing the interfacial transition zone (ITZ) model, the interaction between rebar and fibers with cement composite was simulated. Experimental pull-out tests were conducted to determine the parameters of the model. A meso-scale finite element model was validated and the effect of rebar diameter and fiber volume fraction on the bond behavior of rebar with fiber-reinforced cement composites was examined. In accordance with the experimental results, the bond-slip curve obtained with the meso-scale finite element model can be divided into five areas: non-slip, slight slip, splitting, decreasing, and residual. Additionally, it can be observed that fiber-free cement composites fail by splitting, whereas specimens containing fibers fail by sliding. This numerical model is therefore able to predict and estimate the influence of a variety of parameters on the pull-out response between fiber-reinforced cement composite and ribbed bar and failure mechanisms without the need for expensive and time-consuming testing.","PeriodicalId":512221,"journal":{"name":"Periodica Polytechnica Civil Engineering","volume":"11 45","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141640527","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

The Effect of Nonlinear Sloshing Response of Water on Seismic Behavior of Reinforced Concrete Elevated Water Tanks 水的非线性滑动响应对钢筋混凝土高架水箱抗震性能的影响

Periodica Polytechnica Civil Engineering Pub Date : 2024-07-15 DOI: 10.3311/ppci.23600

Olgun Köksal, Zeki Karaca, Erdem Türkeli

{"title":"The Effect of Nonlinear Sloshing Response of Water on Seismic Behavior of Reinforced Concrete Elevated Water Tanks","authors":"Olgun Köksal, Zeki Karaca, Erdem Türkeli","doi":"10.3311/ppci.23600","DOIUrl":"https://doi.org/10.3311/ppci.23600","url":null,"abstract":"In this study, the fluid-structure interactive behavior by using the Westergaard approach and the Smoothed Particle Hydrodynamics (SPH) method of a 1000 m3 reinforced concrete (RC) elevated water tank under different seismic activities i.e., Kocaeli, Van, Kahramanmaraş and Kobe earthquakes was investigated. In the SPH method, the resulting hydrodynamic pressures were applied to the interior of the wall of the structure as an external force which is made as mass additions to the tank walls in Westergaard approach. With the help of software developed, the load carrying system of the elevated water tank was modeled using the MATLAB Partial Differential Equation Toolbox (PDE) software, based on the finite element method, and its verification was made by comparing with ANSYS software model. Dynamic condensation method was used to perform time history analyses for the cited earthquakes. The time-dependent solutions of partial differential equations are solved with the help of ODE45 functions based on Runge-Kutta method, by arranging the equation of motion in state-space format. The cited tank was analyzed linearly under different seismic activities for empty, half-filled (50%) and full-filled (100%) cases and the obtained results were compared with each other. It has been concluded that considering nonlinear behavior of the fluid during the earthquake with the SPH method provided consistency with the real behavior of RC elevated water tanks and gave more realistic results than the traditional Westergaard approach.","PeriodicalId":512221,"journal":{"name":"Periodica Polytechnica Civil Engineering","volume":"13 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141648111","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

Investigation on NSM-CFRP Ropes Shear Strengthened RC Beams with an Inclusion of Steel-reinforced Geopolymer in the Compressive Zone 关于在压缩区加入钢筋土工聚合物的 NSM-CFRP 绳索剪切加固 RC 梁的研究

Periodica Polytechnica Civil Engineering Pub Date : 2024-07-11 DOI: 10.3311/ppci.23815

G. H. Sudibyo, S. Tudjono, I. Nurhuda

{"title":"Investigation on NSM-CFRP Ropes Shear Strengthened RC Beams with an Inclusion of Steel-reinforced Geopolymer in the Compressive Zone","authors":"G. H. Sudibyo, S. Tudjono, I. Nurhuda","doi":"10.3311/ppci.23815","DOIUrl":"https://doi.org/10.3311/ppci.23815","url":null,"abstract":"The field of structural engineering was focused on the growth of the latest technologies, materials, and techniques that promoted sustainability, and the use of Carbon Fiber Reinforced Polymer (CFRP) as well as geopolymer was a prime example of this effort. Several investigations and developments in composite materials have generated a wide range of materials that could be used to enhance the strength and durability of structures. This study introduces a novel approach to shear strengthening of reinforced concrete (RC) beams by utilizing Near Surface Mounted (NSM) CFRP ropes in combination with steel-reinforced geopolymer in the compressive zone. The investigation aims to assess the effectiveness of these advanced composite materials in enhancing the structural performance of RC beams, as opposed to conventional steel rebar. Three specimens were subjected to three-point bending tests, demonstrating that the NSM-CFRP ropes, paired with steel-reinforced geopolymer, significantly increased load-carrying capacity. Additionally, the results indicated substantial improvements in ductility and energy absorption. This research contributes to the field by providing a sustainable and efficient alternative to traditional strengthening techniques, supported by a comprehensive assessment of both experimental and numerical findings.","PeriodicalId":512221,"journal":{"name":"Periodica Polytechnica Civil Engineering","volume":"90 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141657641","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

The Effect of Mineral Composition on the Correlation between Point Load Index with the Uniaxial Compressive Strength of Sulfate Rocks and their Point Loading Deformation 矿物成分对硫酸盐岩点荷载指数与单轴抗压强度及其点荷载变形相关性的影响

Periodica Polytechnica Civil Engineering Pub Date : 2024-07-10 DOI: 10.3311/ppci.37013

Mohammad Reza Rahimi, S. D. Mohammadi

{"title":"The Effect of Mineral Composition on the Correlation between Point Load Index with the Uniaxial Compressive Strength of Sulfate Rocks and their Point Loading Deformation","authors":"Mohammad Reza Rahimi, S. D. Mohammadi","doi":"10.3311/ppci.37013","DOIUrl":"https://doi.org/10.3311/ppci.37013","url":null,"abstract":"Point load test is a common, inexpensive and fast test for the indirect achievement of compressive or tensile strength of the rocks in the laboratory and the field. In this research, by conducting uniaxial compression test (UCT), axial (APLT), and diametral (DPLT) point load tests on gathered sulfate rock blocks from the Gachsaran Formation outcrops at the four under-construction reservoir dam sites in Iran, investigate the effect of mineral composition on the relationships between point load index, the uniaxial compressive strength (UCS) and their point load deformation. Regarding that, firstly by creating a correlation between axial (APLI) and diametral (DPLI) point load index and UCS, relationships for each specific mineral composition were provided. Secondly, by comparing the reliability of the APLT and DPLT results in predicting UCS, the conversion factors of the APLI and DPLI to the UCS were calculated. Thirdly, the effect of unique or multiple sampling locations in the analysis results was compared, and finally, for the first time, the deformation of loading points in point load tests was investigated. The results of this study confirmed that by variation of mineral composition of sulfate rocks, the relationships between APLI and DPLI, and UCS, conversion factors as well as loading points deformation patterns during point load tests are changed significantly, and the results of APLT and DPLT can be used to predict UCS with the same reliability in dry and saturated conditions.","PeriodicalId":512221,"journal":{"name":"Periodica Polytechnica Civil Engineering","volume":"17 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141659147","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

Failure Mechanism and Structural Optimization of the Primary Support Structure for Expressway Tunnel in Soft Rock: A Case Study 软岩中高速公路隧道主支撑结构的失效机理与结构优化：案例研究

Periodica Polytechnica Civil Engineering Pub Date : 2024-07-08 DOI: 10.3311/ppci.36949

Yamin Wu, Junfeng Duan, Jinfeng Xu, Wanmin Xu

{"title":"Failure Mechanism and Structural Optimization of the Primary Support Structure for Expressway Tunnel in Soft Rock: A Case Study","authors":"Yamin Wu, Junfeng Duan, Jinfeng Xu, Wanmin Xu","doi":"10.3311/ppci.36949","DOIUrl":"https://doi.org/10.3311/ppci.36949","url":null,"abstract":"When the highway tunnel crosses the soft rock, the primary support structure often fails and damages because it cannot withstand the excessive surrounding rock pressure. For the Magu tunnel in Yunnan Province, which is in the upper hard and lower soft stratum, the surrounding rock deformation is large, and the primary support structure occurs spray concrete cracking, steel arch frame twisting deformation. According to the convergence constraint curve, this paper proposes to adopt the primary support optimization design scheme of \"shortening the bench length + optimizing the length and arrangement of anchor rods\". According to the numerical simulation results of FLAC3D, the important indexes such as deformation convergence, surrounding rock stress, anchor axial force and thickness of plastic zone in different excavation support conditions are analyzed. The conclusions are as follows: 1. The soft rock at the foot of the benches does not provide sufficient support resistance, resulting in large settlement and convergence deformation that can cause the primary support structure to fail and become damaged. 2. The length of the middle bench and the primary support strength and stiffness contribute most to the deformation. 3. The deformation control effect of the short anchor rods on the surrounding rock is relatively weak. Increasing the length of anchor can better play the role of anchor suspension enhancement and give full play to the surrounding rock's own bearing capacity. Finally, the deformation of the tunnel is under control after adopting the optimized primary support structure, which ensures the smooth construction.","PeriodicalId":512221,"journal":{"name":"Periodica Polytechnica Civil Engineering","volume":"120 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141666932","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

Numerical Analysis of Combined Effect Hybrid Fibres and Fire Insulation on the Fire Resistance Performance of SCC Beams 混合纤维和防火隔热材料对 SCC 梁耐火性能的综合影响数值分析

Periodica Polytechnica Civil Engineering Pub Date : 2024-07-03 DOI: 10.3311/ppci.36548

Mohamed Zitouni, A. Kada, B. Lamri, Mário Rui Arruda

{"title":"Numerical Analysis of Combined Effect Hybrid Fibres and Fire Insulation on the Fire Resistance Performance of SCC Beams","authors":"Mohamed Zitouni, A. Kada, B. Lamri, Mário Rui Arruda","doi":"10.3311/ppci.36548","DOIUrl":"https://doi.org/10.3311/ppci.36548","url":null,"abstract":"The use of self-compacting concrete in structural members has become increasingly prevalent in various construction applications. However, these structures are susceptible to one of the most hazardous disasters, which is the fire. This paper presents a numerical investigation of the fire resistance performance of self-compacting reinforced concrete (SCC) beams, as well as a parametric study to assess the impact of hybrid fibres and fire insulation on enhancing their performance under fire conditions. The study is conducted by developing a 3D finite element (FE) model using ANSYS software, where temperatures are applied according to the ISO834 standard fire. Geometric and material nonlinearities are considered in the evaluation of the behaviour of beams under fire conditions. The developed FE model is validated by comparing the predicted results with those of the experimental tests in literature. The fire resistance performance of SCC beams was compared with that of normal strength concrete (NSC) beams. The parametric study is conducted using three types of fire insulation, namely Tyfo WR-AFP, CAFCO 300, and Carboline Type-5MD. The results showed that SCC beam has lower fire resistance performance than the NSC beam. However, the incorporation of hybrid fibres allows a 17% improvement in the fire resistance of SCC beams. The use of fire insulations has increased the fire resistance time of SCC beams, and more particularly Carboline Type-5MD insulation with an increase of 28%. The combined use of hybrid fibres and fire insulation improved the fire resistance of SCC beams by 43%.","PeriodicalId":512221,"journal":{"name":"Periodica Polytechnica Civil Engineering","volume":"103 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141683620","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

The Combined Effect of Glass and Plastic Waste on Concrete Properties: Experimental Study 玻璃废料和塑料废料对混凝土性能的综合影响：实验研究

Periodica Polytechnica Civil Engineering Pub Date : 2024-06-13 DOI: 10.3311/ppci.23337

Houssam Eddine Abdelli, S. Kennouche, José Luis Barroso De Aguiar, Carlos Jesus

引用次数: 0