某电厂主厂房框排架结构在基础位移作用下的非线性分析

NONLINEAR ANALYSIS OF FRAMEWORK STRUCTURE OF ONE GENERATING STATION′S POWER HOUSE AFFECTED BY THE FOUNDATION DISPLACEMENTS

采用非线性有限元分析方法 ,对某电厂主厂房加固完成后的框排架结构在基础位移作用下的受力性能进行了非线性全过程分析 ,计算过程中考虑了混凝土的开裂、钢筋的屈服和塑性铰的形成等非线性特性及外包钢结构的二次受力特点 ,根据计算结果对主厂房结构的加固效果及其安全度进行了综合分析和评价 ,提出了主厂房结构达到临危状态的标志及相应时间的有关建议 ,可供电厂抗滑治理工作和临危预报参考。

By adopting nonlinear finite element analysis method,an all course analysis of the frame′s forced performance as a result of the foundation displacements after finishing the reinforcement of the power house is conducted.During the computation,some nonlinear characteristics that include cracking of concrete,yielding of reinforcing bar and appearance of plasticity hinge,and the secondary force character of steel encased concrete frame structure are taken into account.Finally,based on the calculation results,the effects and the safety degree after reinforcing the structure are analyzed and evaluated synthetically,some suggestions for the signs and the time that the power house is going to be in face of danger are also advanced.It can be applied to resisting and harnessing the slippage and predicting hazard for the power house.