双槽渡槽结构剩余抗震性能拟静力试验研究  

Quasi-static test study on the residual seismic performance of aqueduct with double troughs structures

作　　者：张金鹏 柳世宇 曹飞 徐建国[2] 姚广 ZHANG Jinpeng;LIU Shiyu;CAO Fei;XU Jianguo;YAO Guang(Henan Puze Expressway Co.,Ltd,Puyang 457000,China;School of Water Conservancy and Transportation,Zhengzhou University,Zhengzhou 450000,China;Henan Provincial Highway Engineering Group Co.,Ltd,Zhengzhou 450000,China)

机构地区：[1]河南濮泽高速公路有限公司,河南濮阳457000 [2]郑州大学水利与交通学院,河南郑州450000 [3]河南省公路工程局集团有限公司,河南郑州450000

出　　处：《世界地震工程》2024年第3期208-221,共14页World Earthquake Engineering

基　　金：国家自然科学基金面上项目(52079128);河南省科技攻关项目(212102310289)。

摘　　要：为评估大型钢筋混凝土渡槽结构在主震后的剩余抗震性能,以南水北调中线工程某双槽渡槽为原型先进行1/6缩尺振动台试验后,再对渡槽槽身和支架构件分别进行静力和拟静力试验。研究了各构件的破坏模式和剩余抗震能力,同时建立损伤后的有限元模型进行对比验证,并采用能力谱法对渡槽支架结构的剩余抗震性能给予了评估。研究结果表明:主震后槽身试件的破坏模式与以往研究中略有不同;尽管支架试件在主震中产生不同等级震害损伤,在拟静力试验中构件滞回性能、延性系数、承载力衰减、抗侧刚度和耗能性能等参数虽有所差异,但其下降幅度不大且二者损伤发展情况相似;数值模拟结果与试验曲线较为吻合;最后通过能力谱法对渡槽构件的评估说明结构仍具有较好的剩余抗震能力。To evaluate the residual seismic performance of large-scale reinforced concrete aqueduct structures following a main earthquake,a 1/6 scale shaking table test was conducted using a prototype double aqueduct from the South-to-North Water Diversion Middle Route Project.Subsequently,static and pseudo-static tests were conducted on the aqueduct body and bracket components separately,investigating the failure modes and residual seismic capacities of each component.Additionally,a post-damage finite element model was established for comparative validation.The residual seismic performance of the aqueduct bracket structures was assessed using the capacity spectrum method.The research findings indicate that the post-main earthquake failure mode of the aqueduct body specimen slightly differs from previous studies.Despite the varying levels of damage observed in the bracket specimens during the main earthquake,the pseudo-static test demonstrated that parameters such as hysteresis behavior,ductility coefficient,load-carrying capacity reduction,lateral stiffness,and energy dissipation performance had only minor differences between the two damage levels.Additionally,the numerical simulation results closely match the experimental curves.Lastly,the assessment using the capacity spectrum method confirms that the aqueduct components still maintain a satisfactory residual seismic capacity.

关 键 词：双槽渡槽 渡槽支架 已损伤结构 拟静力试验 剩余抗震性能 

分 类 号：TV672.3[水利工程—水利水电工程]