地基弹性与惯性对拱坝振动的影响     

张楚汉  王光纶  李未显 《地震工程与工程振动》1985,(3)

拱坝与地基的动力相互作用对拱坝的振动特性与地震反应有重要的影响。本文着重讨论地基的弹性与惯性相互作用问题。弹性相互作用主要指地基的弹性动力变形对拱坝自振特性的影响;惯性相互作用主要指地基质量的惯性对拱坝自振特性与坝体反应的影响。文中除用反应谱方法外,还用反应历程法对上述影响进行了讨论。  相似文献   

Seismic response of arch dams considering infinite radiation damping and joint opening effects   总被引：3，自引：0，他引：3  

刘新佳  徐艳杰  王光纶  张楚汉 《地震工程与工程振动(英文版)》2002,1(1):65-73

Effects of two important factors on earthquake response of high arch dams are considered and combined into one program. These factors are: effects of radiation damping of the infinite canyon and local non-linearity of the contraction joint opening between the dam monoliths. For modeling of rock canyon, the discrete parameters are obtained based on a curve fitting, thus allowing the nonlinear dam system to be solved in the time domain. The earthquake uniform free-field input at the dam-canyon interface is used. An engineering example is given to demonstrate the significant effects of the radiation damping on the structure response.  相似文献   

复杂地基上拱坝的抗震试验研究   总被引：1，自引：0，他引：1  

张楚汉  李未显  王光纶 《地震工程与工程振动》1986,(3)

本文利用复杂地基的地质力学模型,进行了拱坝与地基的抗震性能试验研究,得到的拱坝各阶自振特性与有限单元法的理论分析结果甚为符合。试验表明:规模较大的坝肩断层构造对地基动力响应有一定影响,这种影响表现为断层交会的被切割岩体的动力反应明显增大。  相似文献   

论拱坝抗震   总被引：4，自引：0，他引：4  

张楚汉  王光纶 《地震工程与工程振动》1986,(4)

本文阐述了拱坝抗震设计与动力分析中的一些主要问题。文中综述了目前对这些问题的研究现状,并提出了若干观点和建议。  相似文献   

A seismic free field input model for FE-SBFE coupling in time domain     

阎俊义  金峰  徐艳杰  王光纶  张楚汉 《地震工程与工程振动(英文版)》2003,2(1):51-58

A seismic free field input formulation of the coupling procedure of the finite element (FE) and the scaled boundary finite-element (SBFE) is proposed to perform the unbounded soil-structure interaction analysis in time domain. Based on the substructure technique, seismic excitation of the soil-structure system is represented by the free-field motion of an elastic half-space. To reduce the computational effort, the acceleration unit-impulse response function of the unbounded soil is decomposed into two functions; linear and residual. The latter converges to zero and can be truncated as required. With the prescribed tolerance parameter, the balance between accuracy and efficiency of the procedure can be controlled. The validity of the model is verified by the scattering analysis of a hemi-spherical canyon subjected to plane harmonic P, SV and SH wave incidence. Numerical results show that the new procedure is very efficient for seismic problems within a normal range of frequency. The coupling procedure presented herein can be applied to linear and nonlinear earthquake response analysis of practical structures which are built on unbounded soil. Supproted by: the National Key Basic Research and Development Program under Grant No. 2002CB412709  相似文献