【摘要】 以6、8、12层平面钢筋混凝土框架结构作为算例模型,首先介绍了从层间水平总位移中减掉弯曲位移以得到剪切位移、并利用此位移来确定真实剪切刚度的计算方法;其次,提出了利用D值法理论刚度调整值和本文推导的刚度比与层数比的拟合曲线,来确定真实剪切弹性刚度实用值的方法和恢复力模型相关参数的方法。最后通过一个10层结构的例子进行了地震反应弹塑性时程分析,验证了真实剪切刚度实用计算方法的合理性和恢复力模型相关参数的可靠性。结果表明,所提的框架结构剪切弹性刚度实用值计算方法和各层恢复力模型参数的确定方法简单易懂,精度高,在确定剪切刚度环节中,可以替代繁琐复杂的推覆分析。更多还原

【Abstract】 Taking plane reinforced concrete frames of 6-storey,8-storey and 12-storey respectively as examples,this paper,introduces a computational method for determining the true shear stiffness by use of the shear displacement which is difference between total interstorey displacement and flexural displacement. Secondly,the paper puts forward a method for determining practical value of true shear elastic stiffness and related parameters of the restoring force model by use of the adjusted stiffness from D-value method and the fitting curves between shear stiffness ratio and the storey ratio,Finally,taking a 10-storey structure as an example,its elastoplastic time history analysis was conduted,the rationality of the practical method for calculating true shear stiffness and reliabilily of relative parameters of restoring force model were varified. The results show that the presented practical calculation method for calculating elastic shear stiffness of frame structure and determination method for restoring forece model parameters are simple,easy and accurate and can replace complex pushover analysis.更多还原