随着《中国地震动参数区划图》的变更,部分地区水闸结构抗震等级发生变化,为保证水闸结构安全运行,需要进行抗震安全复核研究。以渭河拦河闸为例,基于ADINA有限元分析软件,建立了拦河闸三维有限元模型,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,并根据计算结果对拦河闸进行了抗震安全评价。计算结果表明：(1)拦河闸闸室结构前五阶振型主要体现为横梁和机架桥结构的振动,符合一般规律；(2)边孔横梁与机架桥联接部位以及机架桥与闸墩联接部位出现了较大拉应力,其最大拉应力数值超过了混凝土动态抗拉强度标准值,但考虑局部配筋量后,拉应力数值满足安全需求；(3)地震作用最不利工况下,拦河闸整体闸室结构抗滑稳定安全系数为1.68,满足安全需求；(4)拦河闸抗震安全满足标准要求,其抗震等级评定为A级。

With the change of "seismic parameter zoning map of China", the seismic grade of sluice structure in some areas has changed. In order to ensure the safe operation of sluice structure, it is necessary to review the seismic safety. Taking Weihe River Sluice as an example, based on ADINA finite element analysis software, a three-dimensional finite element model of the sluice was established. The seismic response of the sluice chamber structure was calculated and analyzed by using the mode decomposition response spectrum method, and the seismic safety evaluation of the sluice was carried out according to the calculation results. The results showed that: (1) The first five vibration modes of the sluice chamber structure were mainly reflected in the vibration of the beam and frame bridge, which conformed to the general law; (2) the larger tensile stress appeared at the connection part between the side hole beam and the frame bridge and between the frame bridge and the gate pier, and the maximum tensile stress value exceeded the standard value of the dynamic tensile strength of the concrete, but after considering the local reinforcement amount, the tensile stress value met the safety requirements; (3) under the most unfavorable condition of earthquake action, the anti-sliding stability safety factor of the whole sluice chamber structure was 1.68, which met the safety requirements; (4) the seismic safety of the sluice met the standard requirements, and its seismic grade was Grade A.

TV691

黄河水利科学研究院基本科研业务费专项项目(HKY-JBYW-2019-04)