摘要
地下LNG罐与地上LNG罐相比,拥有更好的抗震性、更高的安全性等优点,其工程应用是LNG罐结构的发展趋势,目前我国大陆尚无地下LNG罐的应用先例。振动台试验是研究地下LNG罐地震响应的一个重要手段,为考察不同地震动强度、不同液位、不同埋深情况下地下LNG罐的地震响应特性,基于1个结构模型设计并进行了2组层状剪切试验箱的振动台试验。LNG罐模型参照某22万m^(3)LNG罐进行简化,考虑储液与结构、土与结构的动力相互作用关系对储液、结构、土(包括基岩)进行了相似设计。通过试验设计对模型和边界进行了合理的设置,振动台试验考察了不同工况下的地震响应规律,获得了LNG罐结构的动力响应特性。结果表明试验中展现出的储液-结构-土相互作用的部分特征与相近工程实测结果、经典理论具有一致性。
Compared with the above-ground LNG tank,the underground LNG tank has the advantages of better seismic resistance and higher safety.Its engineering application is the development trend of LNG tank structure,and there is no precedent for the application of underground LNG tank in the Chinese mainland.Shaking table test is an important means to study the seismic response of underground LNG tank.In order to investigate the seismic response characteristics of underground LNG tank under different seismic intensity,different liquid level and different buried depth,two sets of shaking table tests of layered shear test tank were designed and carried out based on a structural model.The LNG tank model is simplified with reference to a 220000m^(3) LNG tank,and the liquid,structure and soil(including bedrock)are similarly designed considering the dynamic interaction between liquid and structure and between soil and structure.Through the test design,the model and boundary are set reasonably.The seismic response rules under different working conditions were investigated by shaking table test,and the dynamic response characteristics of LNG tank structure were obtained.The experimental results show that some of the characteristics of the liquid-structure-soil interaction are consistent with the experimental results and classical theories.
作者
杜斌
高文生
赵晓光
肖立
DU Bin;GAO Wensheng;ZHAO Xiaoguang;XIAO Li(Institute of Foundation Engineering,China Academy of Building Research,Beijing 100013,China;Technology R&D Center,CNOOC Gas and Power Group,Beijing 100028,China)
出处
《建筑结构》
北大核心
2024年第10期134-144,共11页
Building Structure
基金
中海石油气电集团有限责任公司地下LNG储罐振动台试验研究(GP-YF-CB-2019-034)。
