论文部分内容阅读
在核工程抗震计算中 ,普遍还是采用线弹性模型进行动力计算 ,但一般结构物在强震中有可能进入弹塑性变形阶段。该文的主要目的是考察结构物在线弹性模型和弹塑性模型下地震响应的不同。以反应堆厂房为例 ,介绍了线性动力算法和非线性动力算法的不同特点 ,计算了厂房在线弹性模型和弹塑性模型下地震响应 ,并对结构响应进行了比较。与线性模型相比 ,弹塑性计算所得到的结构位移和加速度较大 ,但结构内力却相差不多。结果表明 ,采用非线性模型进行抗震计算可以得到更为真实的结构响应 ,可以更加合理地指导结构设计
In the seismic calculation of nuclear engineering, linear elastic model is generally used for dynamic calculation, but the general structure may enter the stage of elastic-plastic deformation in strong earthquakes. The main purpose of this paper is to investigate the difference of seismic response between the on-line elastic model and the elastoplastic model. Taking the reactor building as an example, the different characteristics of the linear dynamic method and the nonlinear dynamic method are introduced. The seismic responses under the on-line elastic model and the elastoplastic model are calculated and the structural responses are compared. Compared with the linear model, the structure displacements and accelerations obtained by the elastoplastic calculation are larger, but the structural internal forces are similar. The results show that the use of nonlinear model for seismic calculation can be more realistic structural response, can be more reasonable to guide the structural design