Archives of Civil Engineering最新文献_第4页

Study on temperature characteristics of multi-tower cable-stayed bridge 多塔斜拉桥温度特性研究

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147675

Chengyuan Liu, Zhuowei Han, Li Wei, Zhao Lin

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Investigation of thermal and air efficiency in trombe wall of modular building 模块化楼房桁架墙的热效率和空气效率研究

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147682

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Prediction of concrete life under coupled dry and wet-sulfate erosion based on damage evolution equation 基于损伤演化方程预测干湿硫酸盐耦合侵蚀下的混凝土寿命

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147683

Nan Nie

{"title":"Prediction of concrete life under coupled dry and wet-sulfate erosion based on damage evolution equation","authors":"Nan Nie","doi":"10.24425/ace.2023.147683","DOIUrl":"https://doi.org/10.24425/ace.2023.147683","url":null,"abstract":": In a corrosive environment with coupled dry-wet-sulfate action, concrete structures are susceptible to erosion by sulfate ions, which seriously aﬀects the safe operating life. To forecast the operational lifetime of concrete below the inﬂuence of the dry-wet cycle and sulfate erosion environment, four diﬀerent admixtures of polypropylene ﬁber: 0, 0.6, 0.9, and 1.2 kg/m 3 , were incorporated into concrete specimens, and indoor accelerated tests were designed to observe the macroscopic and microscopic deterioration law analysis of concrete specimens; using the precept of damage mechanics, the damage of concrete under solubility cycle was established. The damage evolution equation of concrete under freeze-thaw cycles was established and the operational life of concrete was predicted. The results showed that the overall mass loss rate of concrete specimens increased with the number of tests, and the relative energetic modulo decreased with the number of tests; the pore change pattern, microstructure, and internal material composition of specimens under diﬀerent working conditions were obtained by using NMR scanning technique, SEM electron microscope scanning technique and XRD physical phase analysistechnique. Thedamageevolutionequationshows thataddingacertainamount ofpolypropylene ﬁber to concrete can improve the working life of concrete under dry and wet connected sulfate assault.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"46 6","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138951669","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}

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Characteristic of small-strain stiffness of fine-grained soils based on advanced laboratory tests 基于先进实验室测试的细粒土小应变刚度特征

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147648

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Analysis of the effects of using various backfill materials in the buried pipelines construction 分析在埋设管道施工中使用各种回填材料的影响

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147657

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Influence of anchoring and bracing system on dynamic characteristics of façade scaffolding 锚固和支撑系统对外墙脚手架动态特性的影响

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147672

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Validity and reliability testing of the questionnaire used to finalize criteria for the evaluation of the contractor’s performance 对用于最终确定承包商业绩评估标准的调查表进行有效性和可靠性测试

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147671

Sunil Mahadik, Vinay Topkar

{"title":"Validity and reliability testing of the questionnaire used to finalize criteria for the evaluation of the contractor’s performance","authors":"Sunil Mahadik, Vinay Topkar","doi":"10.24425/ace.2023.147671","DOIUrl":"https://doi.org/10.24425/ace.2023.147671","url":null,"abstract":": The paper aims to determine the criteria and sub-criteria for evaluating the contractor’s performanceandﬁnalizeamasterlistofthecriteriaandsub-criteriatobeusedforevaluatingcontractor’s performancewiththeirrespectiveweights.Themethodisincorporatedintheframeworkproposedfortheevaluationofthecontractor’sperformanceduringtheexecutionphase.Anexploratorystudy hasbeenopted,usingastructured,close-endedmultiple-choicequestionnairesurveyapproach.Thequestionnairesurveywasconductedintwophases,i.e.validationsurvey,andreliabilitysurvey.Fifteen expertsrespondedtothevalidationsurvey,andthirtyexpertstothereliabilitysurvey.TheexpertswerefromGovernmentandpublicsectorsinIndia,workingatvariousseniorlevels.Theweightsofcriteria andsub-criteriawerecalculatedfromdatacollectedinthesurvey,relativeimportancewascalculatedthroughtherelativeimportanceindexandcriteriawereranked.Thepaperprovidescriteriaandsub-criteriawhichwereﬁnalizedthroughaquestionnairesurveybyclassiﬁcationofcriteriaidentiﬁedinliteratureandtenderreview.Therespectiveweightswereﬁnalized,whichcanbemeasuredwhile evaluatingcontractors’performance.Theweightsassignedtocriteriathroughthesurveyare;healthandsafetyis13.19%,followedbyﬁnance11.93%,time11.93%,quality13.38%,clientsatisfaction 12.42%, environmental safety 12.32%, productivity 12.51% and regulation 12.32%. The paper provides the criteria and sub-criteria with their weights needed for evaluating the performance of contractors during the project execution phase. This research can lead to a culture of continuous measurement of performance for the satisfactory completion of projects.","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"56 42","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138949348","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 cracking performance of UHPC overlaid concrete deck at hogging moment zone of steel-concrete composite girders 钢-混凝土复合梁滞后弯矩区超高强度混凝土面层开裂性能研究

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147669

Zhiyong Wan, Guohe Guo, Zhiguo Wang, Shaohua He, Juliang Tan, Libo Hou

{"title":"Investigation on cracking performance of UHPC overlaid concrete deck at hogging moment zone of steel-concrete composite girders","authors":"Zhiyong Wan, Guohe Guo, Zhiguo Wang, Shaohua He, Juliang Tan, Libo Hou","doi":"10.24425/ace.2023.147669","DOIUrl":"https://doi.org/10.24425/ace.2023.147669","url":null,"abstract":": The concrete deck at the negative bending moment region of a continuous steel-concrete compositegirderbridgeistheweakestpartofthestructure.Introducingultra-highperformanceconcrete (UHPC) to the hogging region may overcome the shortage and break through the bottleneck. This paper explores the cracking performance of steel-concrete composite girders with concrete slabs topped by athinlayerofUHPCsubjectedtoanegativebendingmoment.Arealcontinuouscompositegirderbridge is brieﬂy introduced as the engineering background, and the cracking characteristic of the concrete deck over the middle piers of the bridge is numerically modeled. Approaches to strengthen the cracking performance of the concrete deck at the hogging region through topping UHPC overlays are proposed. The eﬀectiveness of the approaches is examined by conducting a series of numerical and experimental tests. Numerical results indicate that the normal concrete (NC) deck near the middle forums of the bridge would crack due to the large tensile stress from negative bending moments. Replacing the top concrete withan identical-thick UHPCoverlay can increasethe cracking resistanceof the deckunder the moment. As the thickness of the UHPC overlay increased from 6.0 cm to 12.0 cm, the maximum shear stress at the UHPC overlay-to-NC substrate interface under diﬀerent load combinations was decreased by 56.3% ∼ 65.3%. Experimental results show that the ﬁrst-cracking load of the composite beam using","PeriodicalId":45753,"journal":{"name":"Archives of Civil Engineering","volume":"9 3","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138951923","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}

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Modeling the vibratory roller compaction process of road soils 路面土壤振动压路机压实过程建模

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Archives of Civil Engineering Pub Date : 2023-12-21 DOI: 10.24425/ace.2023.147668

Dragos Capatina, M. Nițu, Mihaiela Iliescu

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148897 148897

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Archives of Civil Engineering Pub Date : 2023-12-20 DOI: 10.24425/ace.2024.148897

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