摘要
为研究AP1000核电厂基底隔震性能,设计了缩尺比为1/40的AP1000核电厂模型结构,进行了AP1000核电厂模型基底隔震振动台试验。试验中采用铅芯橡胶隔震支座进行隔震,并选取RG1.60人工波、El Centro波和Kobe波作为地震动输入。本文从加速度响应、楼层加速度反应谱、加速度峰值放大系数、减震率等方面对隔震与非隔震核电厂结构的地震响应特性进行了研究。试验结果表明:隔震能明显减小上部结构水平向加速度响应和加速度反应谱峰值,而在隔震频率处隔震模型加速度反应谱有所增加;隔震模型由于摇摆效应在隔震频率处的水平向楼层加速度反应谱随楼层高度的升高先减小后增大;在三向输入地震动作用下,隔震和非隔震AP1000模型各楼层在竖向基频附近的竖向加速度反应谱较竖向输入的地震动放大较为明显。
In order to study the base isolation performance of the AP1000 nuclear power plant( NPP), the AP1000 model structure was designed with a scale ratio of 1/40, and abase-isolation shaking table test was carried out. In the test, the lead rubber bearing was used for isolation, and RG 1.60 artificial wave, El Centro wave and Kobe wave were selected as ground motion input. In this paper, the seismic response characteristics of isolated and non-isolated NPP structure are studied from acceleration response, floor acceleration response spectrum, acceleration peak amplification factor andshock absorption rate. The test results show that the isolation can significantly reduce the horizontal acceleration response and the peak of the acceleration response spectrum of the superstructure, while the acceleration response spectrum of the isolation model increases at the isolation frequency.Because of the rocking effect,the horizontal acceleration response spectrum of the isolation model at the isolation frequency decreases first and then increases with the increase of the floor height.The seismic effect gradually increases with the increase of the input amplitude.Under the three-way input, the floor response spectrum values of isolated and non-isolated AP1000 model near the vertical fundamental frequency are obviously amplified compared with the input ground motion spectrum.
作者
周志光
周龙定
赵锦一
ZHOU Zhiguang;ZHOU Longding;ZHAO Jinyi(Department of Civil Engineering of Tongji University,Shanghai 200092,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2020年第2期64-72,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金面上项目(51778491)。
关键词
核电厂
隔震
振动台试验
加速度反应谱
摇摆效应
nuclear power plant
isolation
shaking table test
accelerationresponse spectrum
rocking effect
