Civil and Environmental Engineering最新文献_第10页

Experimental Investigation on Mechanical Properties of Lightweight Aggregate Concrete 轻骨料混凝土力学性能试验研究

IF 1.2

Civil and Environmental Engineering Pub Date : 2022-11-07 DOI: 10.2478/cee-2022-0061

A. D. Kumar, P. Poluraju, Hanuma Kasagani

{"title":"Experimental Investigation on Mechanical Properties of Lightweight Aggregate Concrete","authors":"A. D. Kumar, P. Poluraju, Hanuma Kasagani","doi":"10.2478/cee-2022-0061","DOIUrl":"https://doi.org/10.2478/cee-2022-0061","url":null,"abstract":"Abstract This present research work mainly focusses on an investigation of the workability and strength properties of lightweight aggregates, particularly Palm oil shell and pumice aggregate, used in the production of concrete with (PA) and (POS), which were substituted for conventional Hard Broken Stone (HBG) coarse aggregate. Through the use of lightweight aggregate (POS and PA) in place of some of the coarse aggregate, the properties of a lightweight concrete M30 have been concentrated in this experimental study. The lab tests that were conducted include the compaction factor test, Schmidt Hammer test (rebound hammer test), and compressive strength. A total of 108 numbers of cube specimen were employed of size 2400 kg/m3. As part of a parametric study, the total number of cube specimens was divided into two groups according to various percentages: palm oil shell and pumice aggregate. In order to cast the cube specimens, dry weight of coarse aggregate was substituted for 0, 10 %, 20 %, 30 %, 40 %, and 50 % of POS and PA lightweight aggregate, respectively. A total of 9 cube specimens were cast and tested for 3, 7, and 28 days after successful curing in order to obtain accurate results. Average values were obtained from the test program and are shown in the corresponding Tables. Slump, compaction factor, rebound hammer compressive strength, and compressive strength values with different amounts of light aggregate were used to assess how well concrete performed when coarse aggregate was partially replaced with light aggregate. The test findings revealed that when the amount of conventional aggregates substituted by POS and PA increased, the slump test, compaction factor test, and strength of the lightweight aggregate concrete (LWAC) rapidly diminished. With an increase in the amount of aggregates replaced by POS and PA, the LWAC’s absorption has gradually increased as water. It is stated at the outset that the POS has shown to perform better than the PA when construction is done using structural lightweight concrete.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45017488","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

Punching Shear Behavior of Fibrous High Strength Concrete Slabs Reinforced with BFRP Bars BFRP筋加筋纤维高强混凝土板的冲剪性能

IF 1.2

Civil and Environmental Engineering Pub Date : 2022-11-07 DOI: 10.2478/cee-2022-0054

H. Falah, Dhuha Adnan

{"title":"Punching Shear Behavior of Fibrous High Strength Concrete Slabs Reinforced with BFRP Bars","authors":"H. Falah, Dhuha Adnan","doi":"10.2478/cee-2022-0054","DOIUrl":"https://doi.org/10.2478/cee-2022-0054","url":null,"abstract":"Abstract This study offers test findings from research work conducted to investigate the punching shear behavior of fibrous high strength concrete flat slabs reinforced with Basalt fiber-reinforced polymer (BFRP) bars. Eleven two-way concrete slabs were tested until they failed under central concentrated force. BFRP bars were employed to reinforce ten of the eleven slabs for flexural reinforcement, while steel bars were used to reinforce one slab for comparison. Each slab measured 1000 × 1000 × 70 mm with a 60 × 60 mm steel column at the center of the slab. The flexural-reinforcement type, flexural-reinforcement ratio, and steel fibers content were the test parameters. According to the test findings, raising the BFRP reinforcement ratio improved the slabs’ punching shear capability and load-deflection response. In comparison to slabs with a lower reinforcing ratio, these slabs also showed fewer, narrower cracks. Steel fibers were added, which improved the failure mode from brittle, unexpected failure to ductile failure. The experimental findings are compared to a shear strength equation offered by several concrete design codes, including ACI 440.1R-15, CAN/CSA S806-12, and JSCE.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45764166","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

Enhancing the Structural Analysis of Rc Piled - Raft Foundation by Actual Behaviour of Supporting Piles 用支护桩的实际性能加强钢筋混凝土桩筏基础的结构分析

IF 1.2

Civil and Environmental Engineering Pub Date : 2022-11-07 DOI: 10.2478/cee-2022-0062

A. H. Al-Zuhairi, S. Q. Abdualrahman, A. N. Hanoon, A. Abdulhameed, Ali I. Taj, Ahmed W. Al Zand

引用次数: 0

Numerical Prediction of Foundation Settlement Resting on Peat Soil at Kafr Saad, Domiat, Egypt 埃及Kafr Saad泥炭土地基沉降数值预测

IF 1.2

Civil and Environmental Engineering Pub Date : 2022-11-07 DOI: 10.2478/cee-2022-0051

K. Bahloul

引用次数: 1

Influencing Factors of Cost Control and Environmental Sustainability in Saudi Arabia for Low-Rise Building Construction 沙特低层建筑施工成本控制和环境可持续性的影响因素

IF 1.2

Civil and Environmental Engineering Pub Date : 2022-11-07 DOI: 10.2478/cee-2022-0038

S. Alhammadi

{"title":"Influencing Factors of Cost Control and Environmental Sustainability in Saudi Arabia for Low-Rise Building Construction","authors":"S. Alhammadi","doi":"10.2478/cee-2022-0038","DOIUrl":"https://doi.org/10.2478/cee-2022-0038","url":null,"abstract":"Abstract Several elements contribute to the environmental effect of building construction, and many stakeholders share responsibility for these issues. Architects and engineers have a considerable interest in the design of the materials and building methods because they are vital in the creation of a design. The environmental effect of various building construction materials should be evaluated to select environmentally friendly building materials. The environmental effect of life cycle of a material comprises not only the energy used in its production but also emissions released into the environment at each stage of production. Embodied energy is one way of measuring construction and recycling environmental impact and the effectiveness of CO2 emissions. The use of indigenous and local construction materials together with energy-saving and environmentally friendly alternatives, including different forms, construction, and management techniques, reduces needless spending by cutting down on construction expenses. This study focuses on developing a comprehensive and integrated approach to environmental sustainability and cost control in low-rise building construction in Saudi Arabia and some other Arab countries by using alternative construction and management techniques and environmentally friendly and energy-efficient innovative materials. Multiple design alternatives, which utilize appropriate cost effective building materials, consider the physical environment, utilize methods of industrialization, and incorporate cost effective construction techniques, are discussed.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43677036","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

Verification of Precast Concrete Girder Bridge Under Static Load 静力荷载作用下预制混凝土梁桥的验证

IF 1.2

Civil and Environmental Engineering Pub Date : 2022-11-07 DOI: 10.2478/cee-2022-0070

P. Bujňáková, J. Kraľovanec, Z. Perkowski, A. Bouchair

引用次数: 3

Performance of Prestressed Concrete Hunched Beams with Multi-Quadrilaterals Openings 多四边形开口预应力混凝土悬臂梁的性能

IF 1.2

Civil and Environmental Engineering Pub Date : 2022-11-07 DOI: 10.2478/cee-2022-0043

Amjad Majeed Al-Hilali, A. F. Izzet

引用次数: 0

Comparison of the Efficiencies of Web Cutouts for Steel Plate Girders with Corrugated Webs Versus Flat Webs Under Pure Shear 纯剪下波形腹板与平腹板钢板梁腹板开孔效率的比较

IF 1.2

Civil and Environmental Engineering Pub Date : 2022-11-07 DOI: 10.2478/cee-2022-0059

A. S. Tohamy, Sherif Farouk Badaran, Ahmed A. El-Serwi, R. Sadeek, A. Saddek

{"title":"Comparison of the Efficiencies of Web Cutouts for Steel Plate Girders with Corrugated Webs Versus Flat Webs Under Pure Shear","authors":"A. S. Tohamy, Sherif Farouk Badaran, Ahmed A. El-Serwi, R. Sadeek, A. Saddek","doi":"10.2478/cee-2022-0059","DOIUrl":"https://doi.org/10.2478/cee-2022-0059","url":null,"abstract":"Abstract Corrugated steel-plate girders are used as structural elements in many applications because of their properties, cutouts are always provided in these plate elements to enable inspection and servicing. This study presents an experimental and analytical study to investigate the efficiency of a steel-plate girder with corrugated webs (GCWs) and flat webs (GFWs) having cutouts under shear loading. In this study, we investigated the influence of some important parameters on the girders’ load-bearing capacity. The experimental program was conducted on six full-scale plate girders, which have been tested under central load at mid-span. The analysis was conducted using ANSYS V20 to perform a nonlinear technique for the determination of the ultimate load of the tested girders. Finally, experimental and finite element model were used to define the ratio of increasing carrying capacity in plate girder with flat and corrugated web, having cutout under shear loading. The ultimate strength, failure mechanism, and load-deflection curves from the experimental and analytical study show that the shear capacity of the girder with corrugated web girders extends loads by 22 % compared with the flat web.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47349380","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

Optimization of Red Sand Particle Size and Composition in Mixture with Ordinary Sand to Enhance Concrete Quality 优化红砂与普通砂配合料的粒径和成分，提高混凝土质量

IF 1.2

Civil and Environmental Engineering Pub Date : 2022-11-07 DOI: 10.2478/cee-2022-0039

Mukti Hamjah Harahap, W. Ritonga, I. Irfandi, M. Zubir

引用次数: 0

Seismic Performance of Special Truss Moment Frames With X-Bracing Type: Influence of Building Height x支撑型特殊桁架弯矩框架抗震性能:建筑高度的影响

IF 1.2

Civil and Environmental Engineering Pub Date : 2022-11-07 DOI: 10.2478/cee-2022-0058

Hidajat Sugihardjo, A. B. Habieb, Robi Karuniawan

{"title":"Seismic Performance of Special Truss Moment Frames With X-Bracing Type: Influence of Building Height","authors":"Hidajat Sugihardjo, A. B. Habieb, Robi Karuniawan","doi":"10.2478/cee-2022-0058","DOIUrl":"https://doi.org/10.2478/cee-2022-0058","url":null,"abstract":"Abstract This study investigated the implementation of Special Truss Moment Frames (STMF) X-braced type in accordance with the recommendations of the National Earthquake Hazards Reduction Program (NEHRP), 1997:2000 and Indonesian National Standards (SNI) 1726 where it is stated that the STMF may only be used up to a maximum building height of 48 m (160 feet) for Seismic Design Category of D. The analyses compared the seismic response of apartment buildings using STMF system with different height: 44 m (11 stories), 48 m (12 stories), and 52 m (13 stories). The nonlinear behaviors were investigated through a series of nonlinear time history and pushover analyses, including the inelastic response of the structural components, top-roof displacement, drift ratio, and ductility. The structural modeling and the selection of steel sections were performed in SAP 2000 based on SNI 1726 code, considering that the structure was built on medium soil in Aceh region. Seismic performance was examined through a series of pushover and nonlinear time history analysis (NLTHA) using three scaled accelerogram: Elcentro 1940, Northridge 1994 and Kobe 1995 records. The results of the study show that in case of STMF structure with the height of 52 m (higher than the maximum height of STMF structure stated in the codes), the seismic performance of the structure was excellent and met the requirements. Axial plasticization occurred only in X-braces, not followed by the formation of plastic hinges at the ends of the ductile segments. Meanwhile, the other structural components remained elastic. This indicates that the structure can still be used after the earthquake, by replacing only the X-braced components. The drift ratio met the requirements and the roof displacements behavior was asymptotic, indicating that there is no residual horizontal displacement of the building after the seismic loads occurred.","PeriodicalId":42034,"journal":{"name":"Civil and Environmental Engineering","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41538037","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