装配叠合式单舱管廊模型振动台试验研究  

Shaking table test research on assembled composite single-cabin pipe gallery model

作　　者：杨艳敏[1] 李子根 李永庆 徐冉 YANG Yanmin;LI Zigen;LI Yongqing;XU Ran(School of Civil Engineering,Jilin Jianzhu University,Changchun 130118,China;Changchun Wate Conservancy Planning and Research Institute,Changchun 130062,China)

机构地区：[1]吉林建筑大学土木工程学院,长春130118 [2]长春市水利规划研究院,长春130062

出　　处：《建筑结构》2023年第13期28-34,共7页Building Structure

基　　金：吉林省科技厅重点研发项目(20200403071SF);国家应急管理部安全事故防治科技项目(jilin-0001-2018AQ);吉林省教育厅“十三五”科学技术项目(JJKH20200281KJ)。

摘　　要：为研究一种装配叠合式单舱管廊结构的抗震性能,基于模型试验相似理论,设计4个管廊模型进行振动台试验,研究不同腋角高度、配筋率以及场地条件对其结构抗震性能的影响。综合分析管廊结构在单向水平地震激励下加速度、层间位移和钢筋应变等动力响应规律。结果表明,在一定范围内增大腋角高度能降低地震对管廊结构的影响,在地震波峰值加速度为0.8g时,层间位移峰值降低41%~55%;相对于全黏土场地,含有可液化砂土夹层的黏土场地对管廊具有一定的减震作用,在El Centro波激励下,管廊侧墙与上腋角交点位置钢筋应变峰值最小降低19.58%;在一定配筋率范围内,提高配筋率能降低管廊的钢筋应变,增大配筋率后,管廊侧墙与上腋角交点位置的钢筋应变峰值相比小配筋率管廊最大降幅达69.01%,利于结构整体抗震;在不同类型地震波激励下,随着其峰值加速度的增大,管廊的层间位移峰值增长特征不同,在Kobe波激励下层间位移峰值增速最大、El Centro波次之、汶川波最小。In order to study the seismic performance of an assembled composite single-cabin pipe gallery structure,four pipe gallery models were designed to carry out shaking table tests based on the similarity theory of model tests.The influences of different axillary angle heights,reinforcement ratios and site conditions on the seismic performance of the structure were studied.The dynamic response laws of the pipe gallery structure,such as acceleration,interlayer displacement and reinforcement strain,were comprehensively analyzed under unidirectional horizontal seismic excitation.The results show that increasing the height of axillary angle within a certain range can reduce the influence of earthquake on the pipe gallery structure.When the peak acceleration of seismic wave is 0.8g,the peak value of interlayer displacement decreases by 41%~55%.Compared with the whole clay field,the clay field with the interlayer of liquefied sand has a certain damping effect on the pipe gallery.Under the excitation of El Centro wave,the peak value of reinforcement strain at the intersection of the side wall and the upper axillary angle of the pipe gallery with a minimum reduction of 19.58%.In a certain range of reinforcement ratio,the increase of reinforcement ratio can reduce the steel bars strain of pipe gallery.When the increase of reinforcement ratio,the maximum reduction of the peak value of steel bar strain at the intersection of the side wall and the upper axillary angle of the pipe gallery is 69.01%,which is conducive to the seismic resistance of the whole structure.Under the excitation of different types of seismic waves,with the increase of peak acceleration,the peak growth characteristics of interlayer displacement of the pipe gallery were different,and the peak growth rate of interlayer displacement was the largest under Kobe wave excitation,followed by El Centro wave and Wenchuan wave.

关 键 词：装配叠合式管廊 振动台试验 场地条件 动力响应 

分 类 号：TU990.3[建筑科学—市政工程]