大流量斜拉压力输水管桥振动台模型试验研究  

Shaking table model test of cable-stayed bridge with large flow water pressure pipeline

作　　者：周敉[1] 冯昭 张鹏利 秦伟[1] ZHOU Mi;FENG Zhao;ZHANG Pengli;QIN Wei(Key Laboratory of Transport Industry of Bridge Detection Reinforcement Technology,Chang’an University,Xi’an 710064,China;CCCC Highway Bridge National Engineering Research Centre,Limited Company,Beijing 100160,China;Hanjiang-to-Weihe River Valley Water Diversion Project Construction Limited Company,Xi’an 710032,China)

机构地区：[1]长安大学旧桥检测与加固技术交通运输行业重点实验室,陕西西安710064 [2]中交公路长大桥建设国家工程研究中心有限公司,北京100160 [3]陕西省引汉济渭工程建设有限公司,陕西西安710032

出　　处：《浙江大学学报（工学版）》2024年第10期2149-2161,共13页Journal of Zhejiang University：Engineering Science

基　　金：陕西省自然科学基础研究计划项目-联合基金资助项目(2021JLM-47);国家自然科学基金资助项目(51978062);陕西省重点研发计划(2024SF-YBXM-644);长安大学中央高校基本科研业务费专项资金资助项目(300102212209).

摘　　要：为了研究斜拉输水管桥的抗震性能,以某大跨径多塔斜拉输水管桥为对象,根据相似理论设计缩尺比为1∶20的等代试验模型,开展振动台试验研究.从不同地震波、不同台面输入地面峰值加速度以及空满管工况等多个角度探究斜拉输水管桥地震响应与抗震性能.采用试验与数值模拟相结合的方法,系统分析大跨径斜拉输水管桥的抗震性能.结果表明,E1地震下结构保持弹性;E2地震下部分钢筋进入屈服,混凝土出现裂缝但结构整体安全.纵桥向地震输入时,考虑流固耦合效应的满管工况相较于空管工况的地震响应增幅小于仅采用附加质量模拟水体时的响应增幅;横桥向地震输入时的结果相反.To study the seismic performance of a large-span,multi-tower cable-stayed water pipeline bridge,an equivalent test model with a scale ratio of 1∶20 was designed based on similarity theory for a shaking table test.The seismic response and seismic performance of the cable-stayed water pipeline bridge were analyzed from various perspectives,including different seismic waves,peak ground acceleration inputs on the platform,and conditions with both empty and full pipes.A combined approach of experimental and numerical simulations was used to comprehensively analyze the seismic performance of the large-span cable-stayed water pipeline bridge.Results show that under the E1 seismic scenario,the structure remains elastic.Under the E2 seismic scenario,some reinforcements yield,and concrete exhibits cracks,but the overall structure remains safe.The increase in seismic response for the full pipe case considering the fluid-structure coupling effect compared to the empty pipe case is smaller than the increase in response when only the water body is modeled with the added mass for the longitudinal bridge seismic input,and the opposite result is obtained for the transverse bridge seismic input.

关 键 词：斜拉管桥 振动台试验 抗震性能 缩尺模型 有限元分析 

分 类 号：TU448[建筑科学—岩土工程]