基于有限元法的跌水闸闸室结构抗震安全复核研究  

Research on the Seismic Safety Recheck of Drop Gate Chamber Structure Based on Finite Element Method

作　　者：郭博文 鲁立三[1,2] 王荆[1,2] 宋力 GUO Bo-wen;LU Li-san;WANG Jing;SONG Li(Yellow River Institute of Hydraulic Research,Zhengzhou 450003,Henan Province,China;Research Center for Levee Safety and Disaster Prevention,Ministry of Water Resources,Zhengzhou 450003,Henan Province,China)

机构地区：[1]黄河水利科学研究院,郑州450003 [2]水利部堤防安全与病害防治工程技术研究中心,郑州450003

出　　处：《中国农村水利水电》2021年第7期155-160,共6页China Rural Water and Hydropower

基　　金：黄河水利科学研究院基本科研业务费专项项目(HKYJBYW-2019-04)。

摘　　要：抗震安全复核是水闸安全鉴定工作中的重要组成部分,为保证水闸结构安全运行,需要进行抗震安全复核研究。以某跌水闸为例,基于ADINA有限元分析软件,建立了跌水闸闸室结构三维有限元模型,采用振型分解反应谱法对闸室结构进行了地震动响应计算分析,并根据计算结果对跌水闸闸室结构进行了抗震安全评价。计算结果表明:①闸墩与闸底板相交处出现了2.00 MPa拉应力,根据结构力学方法复核,该处能承受的最大拉应力为4.41 MPa,满足安全需求;②跌水闸公路桥跨中底部位置和启闭机房底板部分区域出现了较大拉应力区,其数值远超混凝土动态轴心抗拉强度标准值,为安全起见,宜采取相应的抗震加固措施;③跌水闸闸室结构抗滑稳定安全系数大于《水闸设计规范》(SL265-2016)标准值,满足安全需求;④跌水闸闸室结构抗震安全满足《水工建筑物抗震设计标准》(GB51247-2018)要求,但存在不影响总体安全的缺陷,其抗震等级评定为B级。Seismic safety review is an important part of sluice safety appraisal.In order to ensure the safe operation of the sluice structure,seismic safety review research is required.Taking a drop sluice as an example,based on ADINA finite element analysis software,a three-dimensional finite element model of the drop gate chamber structure is established,and the seismic response of the chamber structure is calculated and analyzed by using the mode decomposition response spectrum method,and the seismic safety evaluation of the sluice is carried out according to the calculation results.The results show that:①there is a tensile stress of 2.00 MPa at the intersection of the pier and the bottom plate of the gate.According to the structural mechanics method,the maximum tensile stress at this place is 4.41 MPa,which meets the safety requirements.②There is a large tensile stress area at the bottom of the middle span of the highway bridge of the drop sluice and part of the bottom plate of the hoist room,which is far beyond the standard value of dynamic axial tensile strength of concrete.For the sake of safety,the corresponding anti-seismic reinforcement measures should be taken.③The anti-sliding stability safety factor of the sluice chamber structure is greater than the standard value of sluice design code(SL 265-2016),which meets safety requirements.④The anti-seismic safety of the drop gate chamber structure meets the requirements of the standard for the seismic design of hydraulic structures(GB 51247-2018),but there are seismic defects which do not affect the overall safety,and its seismic grade is evaluated as Grade B.

关 键 词：闸室结构 数值模拟 振型分解反应谱法 抗震安全复核 

分 类 号：TV691[水利工程—水利水电工程]