摘要
从长周期地震加速度反应谱、地震位移反应谱与阻尼比等方面对不同标准体系低温储罐设计标准中晃动波高计算方法进行了分析对比,得出在同等地震动参数条件下按国内标准计算的低温储罐晃动波高计算值远大于欧美标准。分析主要原因为国内长周期地震加速度反应谱值较高且不符合地震反应谱统计特征。提出了以下几点建议:继续搜集实测长周期地震动参数,优化现有标准长周期地震加速度反应谱;优化应与现有地震加速度反应谱的短中周期段进行有效衔接;以可靠长周期地震动位移作为输入,考虑流固耦合下的时程分析,获得较为真实的液面晃动波高;晃动波高计算时可引入抗震重要度系数;进一步明确晃动波高的液位计算基准以及各设防水准下罐壁自由高度的控制值;详细分析计算液体晃动部分对罐体以及土建基础的倾覆力矩作用。
From the aspects of long-period seismic acceleration response spectrum, seismic displacement response spectrum and damping ratio, the calculation methods of sloshing wave height of cryogenic tank with different standard systems are analyzed and compared. It is concluded that under the same ground motion parameters, the sloshing wave height of cryogenic tank calculated according to Chinese standards is much higher than that of European and American standards. The main reason is that the long-period seismic acceleration response spectrum in China is high and does not conform to the statistical characteristics of seismic response spectrum. The corresponding suggestions are put forward. Continue to collect measured long-period ground motion parameters and optimize the long-period seismic acceleration response spectrum of existing standard. The optimization shall be effectively connected with the short and medium period of the existing seismic acceleration response spectrum. Taking the reliable long-period ground motion displacement as the input and considering the time history analysis of FSI, obtaining a more real liquid sloshing wave height. Seismic importance coefficient can be introduced into sloshing wave height calculation. Further define the liquid level calculation benchmark of sloshing wave height and the control value of tank wall free height under each waterproof standard. The overturning moment of the liquid sloshing part on the tank and civil foundation is analyzed and calculated in detail.
作者
许超洋
Xu Chaoyang(SINOPEC Guangzhou Engineering Co.,Ltd.,Guangzhou,Guangdong 510620)
出处
《炼油技术与工程》
CAS
2022年第7期30-34,共5页
Petroleum Refinery Engineering
关键词
低温罐
晃动波高
长周期
地震反应谱
阻尼比
cryogenic tank
sloshing wave height
long-period
seismic response spectrum
damping ratio
