摘要
唐山和汶川等历史震害实例分析说明罕遇地震作用时砂土液化判定的重要性。本文采用建筑抗震设计规范规定的标准贯入试验液化判别方法和基于中心点法的液化判别方法对38个场地收集的钻孔进行砂土液化的判别,其中24个工程场地的钻孔在设防地震作用下判别为不液化,但在罕遇地震作用时却为液化。建议在重大工程建设抗震设防中,宜进一步考虑罕遇地震作用时砂土液化对工程的影响。
The importance of sand liquefaction estimation under rare earthquake action was showed by analyzing historical examples of Tangshan and Wenchuan earthquake damage, etc. The standard penetration test liquefaction estimation method in ＇ Code for Seismic Design of Buildings＇ and liquefaction estimation method based on the center point method were adopted to estimate liquefaction condition of 38 field drilling collected, 24 of which were estimated as not liquefied under fortification earthquake action,but liquefied under rare earthquake action. It is suggested that the liquefaction effect on engineering under rare earthquake action should be further considered in the seismic fortification of major building projects.
出处
《工程抗震与加固改造》
北大核心
2014年第4期137-142,共6页
Earthquake Resistant Engineering and Retrofitting
基金
国家重大专项(SinoProbe-08-02-04)
关键词
砂土液化判定
设防地震作用
罕遇地震作用
重大工程设防
sand liquefaction estimation
fortification earthquake action
rare earthquake action
major engineering fortification
