考虑群桩效应的桩基储罐地震振动分析

DYNAMIC ANALYSIS ON PILED STORAGE TANK SUPORT WITH CONSIDERATION OF GROUP EFFECT

桩基是大型储罐设计时经常采用的重要形式,在地震区必须对其进行抗震设计.根据豪斯纳储罐振动理论,建立了桩基储罐在水平地震作用下的振动模型,提出了对桩的内力和变形的动力分析方法,在计算中考虑了群桩效应对内力和变形的影响,同时根据文克尔地基模型提出一个简单而实用的群桩效应计算方法,分别按考虑和不考虑群桩效应进行了算例分析.结果表明,两种计算结果差别很大.文中提出的分析方法对工程设计有重要的意义.

Pile is one of the most important foundations for the storage tanks. In the seismic area, the seismic design for the pile is necessary. A vibration model for storage tanks supported by pile group foundation under the lateral vibration is established. A dynamic analysis method is proposed by consideration of the effect of pile group. A simple and effective calculation method for the effect of pile group is given on the basis of Winkle subsoil model. A calculation example is presented. The result shows that this method is effective for engineering design.