Proceedings of the Institution of Civil Engineers-Structures and Buildings最新文献_第8页

Numerical simulation of damaged reinforced concrete half-joint beams: towards appraisal and retrofitting 钢筋混凝土半缝梁损伤的数值模拟:评估与改造

IF 1.6 4区工程技术

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2022-04-20 DOI: 10.1680/jstbu.21.00004

S. Abeysinghe, H. Yapa

{"title":"Numerical simulation of damaged reinforced concrete half-joint beams: towards appraisal and retrofitting","authors":"S. Abeysinghe, H. Yapa","doi":"10.1680/jstbu.21.00004","DOIUrl":"https://doi.org/10.1680/jstbu.21.00004","url":null,"abstract":"Half-joint concrete beams are characterized by local reductions in the overall beam depth at the support and are ideal for structural connections. The beam joint region is however vulnerable for deterioration and for design/detailing shortcomings. This study explored the nonlinear numerical modelling potential of the behaviour of a series of impaired half-joint beams. The major defects were: diagonal-bar/ U-bar unavailability; shear reinforcement inadequacy; and reinforcement corrosion. The results highlighted the numerical simulation capabilities to capture global/local behaviours of the beam series. The load capacity prediction offset was in an impressive range of −16.7% to +1.5% and, in contrast, the predictions from the commonly used strut-and-tie model (STM) showed offsets in the extent of −39.2% to 16.9%. Subsequently, an experimental study was established using the FE model to explore the retrofitting potential of defective half-joint beams with a deep embedded (DE) technique. The strength enhancement was almost 30% and the internal load paths as well as the failure mode of the defective beam alternated favourably with the post-installation of the retrofitting element. Thus, the DE technique was identified to be an ideal option to retrofit impaired half-joint beams.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86965075","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: 2

Dynamic monitoring of a tunnel-like masonry structure via WSN 基于WSN的隧道型砌体结构动态监测

IF 1.6 4区工程技术

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2022-03-16 DOI: 10.1680/jstbu.21.00082

G. Bartoli, M. Betti, M. Girardi, C. Padovani, D. Pellegrini, G. Zini

引用次数: 1

Post-fire performance of exterior beam-column joint made with slag-based geopolymer concrete 渣基地聚合物混凝土外梁柱节点火后性能研究

IF 1.6 4区工程技术

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2022-02-24 DOI: 10.1680/jstbu.21.00183

B. Roy, Arshad Hussain Choudhury, A. Laskar

引用次数: 0

IF 1.6 4区工程技术

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2022-02-24 DOI: 10.1680/jstbu.21.00143

N. Baddoo

{"title":"More from less: Greater materials efficiency using high strength steels","authors":"N. Baddoo","doi":"10.1680/jstbu.21.00143","DOIUrl":"https://doi.org/10.1680/jstbu.21.00143","url":null,"abstract":"The use of high strength steels (HSS) enables members to have smaller cross-sections, or be lighter, or both. The extent of the weight savings depends on the type of member and the mode of loading. Lighter sections lead to reductions in carbon and, usually, lower material costs. The reduction in weight can also lead to a cost saving in the foundations, welding, fabrication, transportation and erection. As a result of these benefits, steels of higher strength are being used increasingly in a range of applications in construction, particularly for heavy columns, transfer beams, trusses and bridge girders. Certain aspects of the design and fabrication of HSS require special attention in order to exploit fully the benefits of the high strength. In 2018, ICE awarded a grant from the ICE Research and Development Enabling Fund for SCI to write a guide covering both design and execution of HSS of yield strength from 420 MPa up to 700 MPa, giving ‘holistic’ guidance covering strength, stability, serviceability and fabrication. The High Strength Steel Design and Execution Guide, was written in collaboration with experts in the steel construction supply chain, and was published in 2020.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78822587","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: 2

Seismic vibration control of discontinuous suspended ceilings in semiconductor and LCD fabs 半导体和LCD晶圆厂不连续吊顶的地震振动控制

IF 1.6 4区工程技术

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2022-02-24 DOI: 10.1680/jstbu.21.00153

Yung-Tsang Chen, Chien‐Liang Lee, William Soo Lon Wah, Mei-Yu Chen, Yen-Po Wang, Jui-Kun Chen, Hsing-Chih Yu

{"title":"Seismic vibration control of discontinuous suspended ceilings in semiconductor and LCD fabs","authors":"Yung-Tsang Chen, Chien‐Liang Lee, William Soo Lon Wah, Mei-Yu Chen, Yen-Po Wang, Jui-Kun Chen, Hsing-Chih Yu","doi":"10.1680/jstbu.21.00153","DOIUrl":"https://doi.org/10.1680/jstbu.21.00153","url":null,"abstract":"In semiconductor and liquid crystal display (LCD) industries, suspended ceilings are widely used in wafer and LCD panel fabs. Despite several preventive measures been taken, substantial financial loss was reported in the past earthquakes, and one of the main causes was attributed to damage or collapse of the ceilings due to excessive ceiling sway during earthquakes. This paper proposes a practical approach of incorporating customized viscous dampers into the suspended ceilings to mitigate their seismic response. Unlike conventionally been done in most fabs where diagonal bracing rods were added between suspended ceilings and structural floor slab to mitigate ceilings’ vibration, it is proposed to install customized viscous dampers in between the ceiling and the column/wall. An analytical model to simulate the vibration of a suspended ceiling is first developed, followed by shake table tests of the ceiling-structure model to verify the effectiveness and feasibility of the proposed approach. Results indicated that when equipped with the viscous dampers, the displacement responses of the suspended ceiling can be significantly reduced, and incorporating the dampers into the ceiling with added bracing rods is shown to give the best seismic performance.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90863807","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

Corrosion-induced cracking of recycled aggregate concrete beams under static load 静荷载作用下再生骨料混凝土梁腐蚀开裂研究

IF 1.6 4区工程技术

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2022-01-24 DOI: 10.1680/jstbu.21.00088

Jian Wang, Han Su, Jinsheng Du, Jing Yu

{"title":"Corrosion-induced cracking of recycled aggregate concrete beams under static load","authors":"Jian Wang, Han Su, Jinsheng Du, Jing Yu","doi":"10.1680/jstbu.21.00088","DOIUrl":"https://doi.org/10.1680/jstbu.21.00088","url":null,"abstract":"To investigate the corrosion-induced cracking of recycled aggregate concrete beams under static load, twelve recycled aggregate concrete beams considering three types of recycled coarse aggregate (RCA) replacement ratios and four levels of static load were prepared and tested. The test results showed that the area of corrosion-induced cracking on the tension surface of the beams firstly increased when the static load level increased from 0 to 0.2, then decreased as the static load level increased from 0.2 to 0.4, thereafter increased until the static load level reached 0.6. The maximum width of longitudinal corrosion cracks had a strong linear relationship with corrosion duration and tended to increase with static load level and RCA replacement ratio. The lognormal distribution satisfactorily described the probability distribution of the width of longitudinal corrosion cracks. For the beams with a larger static load level, the degree of scatter of the crack width tended to increase, and the shape of the probability distribution curve tended to be flat. The research results are helpful to improve the durability design theory of recycled aggregate concrete beams under load and can play an important role in promoting the engineering application of recycled aggregate concrete beams.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90747308","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: 2

Wood-fibre composite moulded connectors for roundwood trusses Part 1: Structural and material design 圆木桁架用木纤维复合模压连接器。第1部分:结构和材料设计

IF 1.6 4区工程技术

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2022-01-24 DOI: 10.1680/jstbu.21.00155

Tarick Chahade, K. Schober

引用次数: 0

Structural and Thermal Performance of a Novel Form of Cladding Panel: the I-beam Beetle Elytron Plate 一种新型覆层板的结构和热性能:工字梁甲虫鞘翅板

IF 1.6 4区工程技术

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2021-11-12 DOI: 10.1680/jstbu.21.00043

Li Hu, Zhijie Zhang, Jinxiang Chen, Hao Ren

{"title":"Structural and Thermal Performance of a Novel Form of Cladding Panel: the I-beam Beetle Elytron Plate","authors":"Li Hu, Zhijie Zhang, Jinxiang Chen, Hao Ren","doi":"10.1680/jstbu.21.00043","DOIUrl":"https://doi.org/10.1680/jstbu.21.00043","url":null,"abstract":"To develop a nonbearing prefabricated straw sandwich concrete wallboard (I-beam beetle elytron plate: IBEPsc), the effect of certain structural parameters (e.g., panel thickness T, number of I-cores N and core height h) on the mechanical and thermal insulation performance was investigated by using the finite element method. The results are as follows: 1) The bearing capacity of the IBEPsc is controlled by the maximum principal tensile stress; the optimal structural parameters of the IBEPsc for a self-insulated wall with a large safety margin are presented. 2) The consideration of strips vs. whole plates and the selected upper bearing constraint type have little influence on the mechanical properties. In practical applications, the strips and whole plates can be reasonably selected according to engineering needs, and these components can be connected with the main structure by conventional mortar. 3) According to a qualitative analysis and comparison with common I-shaped thermal insulation walls, the IBEPsc requires the least material and weight while ensuring a sufficient safety margin in terms of mechanical and thermal insulation performance. Hence, biomimic techniques can play a key role in breaking through the limitations of traditional structures. This paper can help direct the application of beetle elytron plates in prefabricated wallboards.","PeriodicalId":54570,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Structures and Buildings","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90870678","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

Performance of variously shaped glass-fibre-reinforced polymer bars in concrete columns 不同形状玻璃纤维增强聚合物钢筋在混凝土柱中的性能

IF 1.6 4区工程技术

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2021-11-12 DOI: 10.1680/jstbu.20.00242

Afaq Ahmad, M. Elchalakani, M. Iqbal, Yimou Huang, G. Ma

引用次数: 0

Damage Detection of Offshore Platforms Using Dispersion Analysis in HHT Frequency Spectrum 基于HHT频谱色散分析的海洋平台损伤检测

IF 1.6 4区工程技术

Proceedings of the Institution of Civil Engineers-Structures and Buildings Pub Date : 2021-10-27 DOI: 10.1680/jstbu.21.00075

S. B. Beheshti Aval, Mohammad Maldar, E. Darvishan, Bahareh Gholipour, Nakisa Mansouri Nejad, B. Asgarian

引用次数: 2