Case Studies in Structural Engineering最新文献

Seismic vulnerability assessment of an Italian historical masonry dry dock 意大利历史砖石干船坞地震易损性评价

Case Studies in Structural Engineering Pub Date : 2017-01-01 DOI: 10.1016/j.csse.2016.11.001

Marco Zucca, Pietro Giuseppe Crespi, Nicola Longarini

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引用次数: 9

Role of construction materials in the collapse of R/C buildings after Mw 7.8 Pedernales – Ecuador earthquake, April 2016 2016年4月厄瓜多尔Pedernales 7.8级地震后建筑材料在R/C建筑倒塌中的作用

Case Studies in Structural Engineering Pub Date : 2017-01-01 DOI: 10.1016/j.csse.2016.12.001

Fabricio Yépez , Oswaldo Yépez

引用次数: 13

Fatigue reliability assessment of ageing railway truss bridges: Rationality of probabilistic stress-life approach 老化铁路桁架桥梁疲劳可靠性评估:概率应力-寿命法的合理性

Case Studies in Structural Engineering Pub Date : 2016-12-01 DOI: 10.1016/j.csse.2016.04.002

Nirosha D. Adasooriya

{"title":"Fatigue reliability assessment of ageing railway truss bridges: Rationality of probabilistic stress-life approach","authors":"Nirosha D. Adasooriya","doi":"10.1016/j.csse.2016.04.002","DOIUrl":"10.1016/j.csse.2016.04.002","url":null,"abstract":"<div><p>Rail authorities all over the world are paying attention to extend the service lives of railway bridges. The famous Miner’s rule employed deterministic or probabilistic fatigue assessment approaches are generally used to predict remaining fatigue life of ageing railway bridges. Under many variable amplitude loading conditions, life predictions have been found to be unreliable since Miner’s rule does not properly take account the loading sequence effect. Therefore, this paper presents a comparison of a new probabilistic fatigue assessment approach with deterministic approach consisting of a new damage indicator, which captures the loading sequence effect of variable amplitude loads more precisely than the Miner’s rule. The comparison is performed by applying both fatigue assessment approaches to predict the remaining fatigue life of an ageing railway bridge. This comparison intends to conclude the possibility of capturing uncertainty behind loading sequence effect by proposed probabilistic fatigue assessment approach. Initially the paper presents the both approaches. Then the proposed approaches are applied to predict the fatigue lives of an ageing railway bridge. Finally predicted fatigue lives are compared and rationality, significance and validity of the proposed approaches are discussed.</p></div>","PeriodicalId":100222,"journal":{"name":"Case Studies in Structural Engineering","volume":"6 ","pages":"Pages 1-10"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.csse.2016.04.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83602391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 26

Strut effectiveness factor for reinforced concrete deep beams under dynamic loading conditions 动载条件下钢筋混凝土深梁的支撑有效系数

Case Studies in Structural Engineering Pub Date : 2016-12-01 DOI: 10.1016/j.csse.2016.08.001

Ammar N. Hanoon , M.S. Jaafar , Farzad Hejazi , F.N.A. Abd Aziz

{"title":"Strut effectiveness factor for reinforced concrete deep beams under dynamic loading conditions","authors":"Ammar N. Hanoon , M.S. Jaafar , Farzad Hejazi , F.N.A. Abd Aziz","doi":"10.1016/j.csse.2016.08.001","DOIUrl":"10.1016/j.csse.2016.08.001","url":null,"abstract":"<div><p>In a current study, a new strut effectiveness factor based on Strut-and-Tie Model (STM) is proposed to assess the ultimate shear strength of reinforced concrete (RC) deep beam subjected to dynamic loads. The derivation of the new effectiveness factor of concrete struts is based on Mohr–Coulomb criterion failure. Two types of concrete failure, diagonal splitting and concrete crushing failure modes, are proposed and examined. The modification of the proposed model is simulated in a MATLABSIMULINK environment. The proposed model exhibits efficiency in assessing dynamic shear resistance for deep beams. Moreover, a parametric study is then conducted to examine the effect of flexural reinforcement ratio, transverse reinforcement and shear-span to depth ratio on shear behavior of RC deep beams with consideration of the changes in strain rate. The proposed effectiveness factor is validated by utilizing the experimental results obtained from the literature and shows good accuracy for prediction the shear strength of reinforced concrete deep beams under different loading conditions.</p></div>","PeriodicalId":100222,"journal":{"name":"Case Studies in Structural Engineering","volume":"6 ","pages":"Pages 84-102"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.csse.2016.08.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90103479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Material strength of long-term used penstock of a hydroelectric power plant 某水电站长期使用压力管材料强度

Case Studies in Structural Engineering Pub Date : 2016-12-01 DOI: 10.1016/j.csse.2016.06.002

F. Kawamura , M. Miura , R. Ebara , K. Yanase

引用次数: 5

A wireless railway catenary structural monitoring system: Full-scale case study 无线铁路接触网结构监测系统:全尺寸案例研究

Case Studies in Structural Engineering Pub Date : 2016-12-01 DOI: 10.1016/j.csse.2016.05.003

Petter Nåvik , Anders Rønnquist , Sebastian Stichel

{"title":"A wireless railway catenary structural monitoring system: Full-scale case study","authors":"Petter Nåvik , Anders Rønnquist , Sebastian Stichel","doi":"10.1016/j.csse.2016.05.003","DOIUrl":"10.1016/j.csse.2016.05.003","url":null,"abstract":"<div><p>Full-scale structural measurements of new and existing railway catenary systems are becoming increasingly important due to continually increasing train speeds and the resulting consequences. Higher speeds lead to increased loads and greater structural dynamic responses, necessitating that both static and dynamic regulations be fulfilled. Sampling directly on railway catenary sections is necessary to assess their structural behaviour. The results can both be analysed directly and be used for validating and/or improving numerical models, which in turn can be used to explore the structural response at higher speeds. This case study presents and explores a newly developed wireless sensor system that includes multiple sensors that can be mounted arbitrarily on any of the wires in a catenary system. All sensors synchronously sample accelerations and rotational velocities over a range of up to 1400m. This paper shows the results of mounting the developed sensor system and sampling the data of an existing railway catenary section at the Hovin station in Norway. Sampling was performed from both self-excited tests and 140 scheduled train passages. The outputs have been analysed to show that the data can be used to successfully assess railway catenary structural response components.</p></div>","PeriodicalId":100222,"journal":{"name":"Case Studies in Structural Engineering","volume":"6 ","pages":"Pages 22-30"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.csse.2016.05.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87473718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Case study of load-bearing precast wall system subject to low seismic intensity by linear and nonlinear analyses 基于线性和非线性分析的低烈度荷载预制墙体系实例研究

Case Studies in Structural Engineering Pub Date : 2016-12-01 DOI: 10.1016/j.csse.2016.05.001

Patrick Liq Yee Tiong , Sing Ping Chiew , Beng Hur Teow

{"title":"Case study of load-bearing precast wall system subject to low seismic intensity by linear and nonlinear analyses","authors":"Patrick Liq Yee Tiong , Sing Ping Chiew , Beng Hur Teow","doi":"10.1016/j.csse.2016.05.001","DOIUrl":"10.1016/j.csse.2016.05.001","url":null,"abstract":"<div><p>This paper investigates the behaviour of load-bearing precast wall system (namely the HC Precast System − HCPS) subject to seismicity in Malaysia. Recent tremors felt across the country heeded the call for the need of seismic design guidelines to be implemented. For this study, the design ground acceleration for Malaysia has not been finalized. Throughout the years, several schools of thought that occurred among different researchers pertaining to the value of design ground acceleration, ranging from 0.05g to 0.1g. The implications of the selected values can be great especially in designing new buildings or retrofitting existing ones. Thus, linear analysis using Modal Response Spectrum Analysis (MRSA) and nonlinear pushover analysis of representative HCPS were performed for this study. The finite element (FE) model focused particularly on the nonlinear behaviour of the interface between a precast wall and cast in-situ column. Prior to the modal and pushover analyses, the FE model was validated against quasi-static cyclic test results of identical precast system obtained from literature. Differences between the MRSA and pushover approaches are presented and discussed. Performance levels of the structural system were subjected to three levels of design ground acceleration (0.05, 0.075 and 0.1g) have been included.</p></div>","PeriodicalId":100222,"journal":{"name":"Case Studies in Structural Engineering","volume":"6 ","pages":"Pages 11-21"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.csse.2016.05.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86900516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An analytical model for inelastic cyclic response of eccentrically braced frame with vertical shear link (V-EBF) 带竖向剪力杆偏心支撑框架的非弹性循环响应解析模型

Case Studies in Structural Engineering Pub Date : 2016-12-01 DOI: 10.1016/j.csse.2016.05.002

Jack Bouwkamp , Mohamad Ghasem Vetr , Ali Ghamari

引用次数: 45

Current UK trends in the use of simple and/or semi-rigid steel connections 当前英国使用简单和/或半刚性钢连接的趋势

Case Studies in Structural Engineering Pub Date : 2016-12-01 DOI: 10.1016/j.csse.2016.05.004

M. Kidd, R. Judge, S.W. Jones

引用次数: 8

An approximate method of dynamic amplification factor for alternate load path in redundancy and progressive collapse linear static analysis for steel truss bridges 一种冗余交替荷载路径动态放大系数的近似方法及钢桁架桥梁的渐进倒塌线性静力分析

Case Studies in Structural Engineering Pub Date : 2016-12-01 DOI: 10.1016/j.csse.2016.06.001

Hoang Trong Khuyen , Eiji Iwasaki

{"title":"An approximate method of dynamic amplification factor for alternate load path in redundancy and progressive collapse linear static analysis for steel truss bridges","authors":"Hoang Trong Khuyen , Eiji Iwasaki","doi":"10.1016/j.csse.2016.06.001","DOIUrl":"10.1016/j.csse.2016.06.001","url":null,"abstract":"<div><p>Linear static analysis with an alternate load path using dynamic amplification factor (DAF) is often used for redundancy and progressive collapse analysis of steel truss bridges to avoid using the more time-consuming dynamic analysis. This study presents an empirical equation to calculate the DAF for this type of analysis against the initial sudden member fracture. Currently, this analysis employs an approximate model with a single degree of freedom to calculate the DAF. With a 5% damping ratio, the constant DAF of 1.854 is used for all types of steel truss bridges. However, this approach is inaccurate because the DAF varies between bridges and with the location of the fractured members as well. Considering some of the approaches developed for building structures but adapting them to steel truss bridges, this paper proposes an empirical equation that allows for the computation of the DAF from the maximum norm stress <span><math><mrow><msub><mi>σ</mi><mrow><mi>i</mi><mi>s</mi></mrow></msub><mo>/</mo><msub><mi>σ</mi><mrow><mi>i</mi><mi>y</mi></mrow></msub></mrow></math></span> in static linear elastic analysis of the damaged model with a member removal. A total of 30 illustrative cases for two typical steel truss bridges are investigated to obtain the data points for the empirical equation. The proposed empirical equation is the enveloped line offset from the best fit line for the data points in illustrative cases.</p></div>","PeriodicalId":100222,"journal":{"name":"Case Studies in Structural Engineering","volume":"6 ","pages":"Pages 53-62"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.csse.2016.06.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81432070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16