上-下部结构相互作用对水电站厂房地震响应的影响研究  

Effect of interaction between superstructure and substructure on the seismic response of hydropower station plant

作　　者：张剑峰 宋志强[1] 王飞 朱少坤 王娟[1] ZHANG Jianfeng;SONG Zhiqiang;WANG Fei;ZHU Shaokun;WANG Juan(Faculty of Water Resource and Hydro-Electric Engineering,Xi'an University of technology,Xi'an 710048,China)

机构地区：[1]西安理工大学水利水电学院

出　　处：《水资源与水工程学报》2019年第6期186-193,共8页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(51479165)

摘　　要：为了探究上-下部结构相互作用对水电站地面厂房地震响应的影响,基于工程实例,针对当前普遍应用的简化分析方法,确定了4种方案对比分析下部结构的放大效应、上下部结构的耦联以及下部结构混凝土材料采用线弹性本构模型对厂房结构地震响应的影响。结果表明:不考虑下部结构放大效应或者不考虑上下部结构耦联会使厂房结构的地震响应偏小且偏差较大,据此设防将不利于结构的抗震安全;不考虑下部结构混凝土材料的塑性力学行为时,厂房结构的地震响应偏大但较为接近真实值,进一步比较结构的各项能量分配和受拉损伤演化过程,此方案上部结构的塑性变形耗能和损伤耗能均减小,损伤范围也减小,下游墙体的损伤程度却更为严重,但结构破坏模式相似,均为上下部结构的相交部位发生损伤破坏,所以认为应用此方法做抗震简化分析能够较为准确地反映上-下部结构的相互作用,并且有利于水电站地面厂房的抗震安全。In order to explore the influence of the interaction between superstructure and substructure on the seismic response of ground plant of hydropower station and aiming at the simplified analysis method widely used in seismic research at present,four schemes were selected to compare and analyse the influence of the amplification effect of the substructure,the coupling of the superstructure and substructure,and the linear elasticity model for concrete materials of the substructure on the seismic response of hydropower station plant based on engineering examples.The results showed that the seismic response of the powerhouse structure will be smaller and deviate greatly without considering the amplification effect of the substructure or the coupling of the superstructure and substructure,which will not be conducive to the seismic design of the structure,so it should be considered in the seismic analysis.The seismic response of powerhouse structure is larger but closer to the true value without considering the plastic mechanical behavior of the concrete material of the substructure.Further comparison of the energy distribution and damage evolution process of the hydropower station plant structure showed that the plastic deformation energy,the damage energy of the superstructure,and the damage region reduced.The damage of the downstream wall was more serious,but the failure models of the structure were similar,both are damaged at the intersection part of superstructure and substructure.Therefore,it is considered that the simplified seismic analysis with this method can reflect the interaction between superstructure and substructure more accurately,and it is also conducive to the seismic safety of ground plant of hydropower station.

关 键 词：上-下部结构相互作用 水电站地面厂房 地震响应 能量分配 结构损伤 

分 类 号：TV731[水利工程—水利水电工程] TV312