钢纤维自密实混凝土节段拼装桥墩拟静力试验研究  

Experimental Study on Seismic Performance of Precast SegmentalBridge Columns with Steel Fiber Self-Compacting Concrete

作　　者：高文军[1,2] 兰海燕[1,2] 刘少乾[3] 唐光武 GAO Wenjun;LAN Haiyan;LIU Shaoqian;TANG Guangwu(State Key Laboratory of Bridge Engineering Structural Dynamics,Chongqing 400067;China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067;Sichuan Highway Planning,Survey,Design and Research Institute Ltd,Chengdu 610041)

机构地区：[1]桥梁工程结构动力学国家重点实验室,重庆400067 [2]招商局重庆交通科研设计院有限公司,重庆400067 [3]四川省公路规划勘察设计研究院有限公司,成都610041

出　　处：《公路交通技术》2021年第2期40-44,共5页Technology of Highway and Transport

基　　金：国家国际科技合作专项项目(2011DFA83300);交通运输部应用基础研究项目(2013319740090);国家重点研发计划项目(2017YFC0806009)。

摘　　要：为减少地震作用下节段拼装桥墩接缝处混凝土的破坏,以及研究钢纤维自密实混凝土的耗能能力,分别制作了普通自密实混凝土和钢纤维自密实混凝土的节段拼装桥墩模型。采用拟静力试验研究2个试验模型的抗震性能,对试验过程中的节段接缝破坏特点、力-位移滞回曲线和耗能能力进行了分析。研究结果究表明:钢纤维能有效延缓裂缝的发展和混凝土剥落的发生,但拟静力试验中钢纤维自密实混凝土的耗能能力并没有得到提高。In order to reduce the damage of the concrete at the joints of the precast segmental bridge columns under earthquakes,and to study the energy dissipation capacity of the steel fiber self-compacting concrete,the seismic performance of two segmental column models constructed with self-compacting concrete and concrete steel fiber self-compacting concrete are tested by pseudo static test.The failure characteristics of the joints,the force-displacement hysteresis curve and the energy dissipation capacity during the quasi-static experiment were analyzed.It is concluded that steel fibers can effectively delay the development of cracks and the concrete damage,but the energy dissipation capacity in the quasi-static experiment has not been improved.

关 键 词：钢纤维 自密实混凝土 节段拼装桥墩 拟静力试验 抗震性能 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]