详情

原文传递 Flexural Performance of UHPC-Concrete-ECC Composite Member Reinforced with Perforated Steel Plates

题名：	Flexural Performance of UHPC-Concrete-ECC Composite Member Reinforced with Perforated Steel Plates
正文语种：	eng
作者：	Huang, Bo-Tao;Dai, Jian-Guo;Weng, Ke-Fan;Zhu, Ji-Xiang;Shah, Surendra P.
作者单位：	Hong Kong Polytech Univ Dept Civil & Environm Engn Kowloon Hong Kong Peoples R China;Hong Kong Polytech Univ Dept Civil & Environm Engn Kowloon Hong Kong Peoples R China;Hong Kong Polytech Univ Dept Civil & Environm Engn Kowloon Hong Kong Peoples R China\|Southern Univ Sci & Technol Dept Ocean Sci & Engn Shenzhen 518055 Guangdong Peoples R China;Hong Kong Polytech Univ Dept Civil & Environm Engn Kowloon Hong Kong Peoples R China;Univ Texas Arlington Civil Engn Struct & Mat Arlington TX 76019 USA\|Univ Texas Arlington Ctr Adv Construct Mat Dept Civil Engn Arlington TX 76019 USA\|Northwestern Univ Dept Civil & Environm Engn Civil Engn Evanston IL 60201 USA
关键词：	Ultrahigh-performance concrete (UHPC);Engineered cementitious composites (ECC/SHCC);Perforated steel plate;Composite member;Underground utility tunnel;Flexural performance;Digital image correlation (DIC)
摘要：	A novel reinforced concrete structural member comprising ultrahigh-performance concrete (UHPC) and engineered cementitious composite (ECC) was proposed for use in underground structures, such as prefabricated utility tunnels. In this composite member, UHPC was used as the exterior (i.e., soil side) protective layer to prevent the penetration of water and corrosive agents, and ECC was used as the interior (i.e., service environment side) protective layer to improve the member's crack-control capacity and fire resistance. Ordinary concrete was filled between the UHPC and ECC layers. The composite member was reinforced with perforated steel plates to achieve strong mechanical interaction between the composite materials and to ensure structural integrity. The proposed composite was experimentally characterized as follows. The tension-stiffening effect in ECC panels with a perforated steel plate was evaluated using direct tensile tests. The flexural behavior of the reinforced UHPC-concrete-ECC members was characterized with four-point bending tests. The failure processes of the composite members were analyzed via the digital image correlation (DIC) method. Finally, a simplified theoretical method was developed to estimate the yield and ultimate load-carrying capacities of the composite member, and the estimated results showed good agreement with the test results. Overall, the proposed composite member had favorable mechanical performance and durability due to the strategic use of UHPC and ECC. (C) 2021 American Society of Civil Engineers.
出版年：	2021
期刊名称：	Journal of structural engineering
卷：	147
期：	6