摘要
本文在推求群桩刚度矩阵中,从群桩中对称的两根桩的基本情况出发,考虑了桩的轴向刚度对整体摇摆刚度的影响;在形成电视塔和群桩总刚度矩阵中运用了矩阵简约方法,在形成地基土柔度矩阵中利用了对称性原理,有效地减少了计算工作量;还将传递矩阵法与振型分解法有效地结合,用FORTRAN-77语言编制了专用计算程序,实现了在微机上进行电视塔-桩-土相互作用地震反应分析。通过算例分析得到一些规律性的结论,可供电视塔抗震设计参考。
In this paper,stiffness matrix of pile group is derived baesd on the fundamental situation of two symmetrical piles in pile group in consideration of the contribution of axial stiffness to the total rocking stiffness.In forming the total stiffness matrix, the method of reduced stiffness matrix is applied.By use of the principle of symmetry the calculation of soil flexibility matrix is significantly simplified,thus,the computation time is greatly saved.Furthermore,the transfer matrix method is used in effective combination with the mode superposition method in analyzing seismic response of TV tower-pile -soil interaction system.Based on the above-mentioned theory,a special computer program using FORTRAN 77 language is compiled,so that the TV tower-pile-soil interaction analysis can be carried out on microcomputer. Finally,a numerical example concerning the regularities of dynamic behavior and seismic response of TV tower-pile-soil system as well as some useful opinions for seismic design of TV tower are presen ted.
出处
《土木工程学报》
EI
CSCD
北大核心
1991年第3期71-79,共9页
China Civil Engineering Journal
