某多层不规则RC框架结构的弹塑性时程分析

基于有限元软件ETABS,将弹塑性时程分析方法作为主动设计方法,利用其对某地区多层不规则中学建筑进行分析,依据分析结果找到结构薄弱部位,然后采用加大梁柱截面及加支撑两种方式进行结构方案的调整。将调整后的两种结构型式与原纯框架结构进行对比分析,结果表明:层间最大位移较原结构分别减小了57.8%和73.6%;结构周期分别减少了10%和23.5%。弹塑性时程分析方法可以作为一种主动设计手段,指导设计人员有针对性地进行结构方案调整和性能化设计。

Elastic-plastic Time-history Analysis of a Certain Irregular RC Frame Structure

Based on the finite element software ETABS,this paper takes elastic-plastic time-history analy-sis as the active design method,using the elastic-plastic time-history analysis to make analysis of a certain multilayer irregular secondary school building.And then it finds the weak structure position according to the analysis results.Then it uses the two methods of the increase of section of beam and column and sup-ports adding to make the adjustment of structural concept.Then,it makes comparative analysis between the two adjusted structure and the original pure framed structure,the maximal displacement between the layers have reduced 57.8% and 73.6% when compared to the original structure,respectively.And the structure pe-riod has reduced 10% and 23.5%,respectively.The results show that:nonlinear time history analysis method can be used as a active design method to guide designers to make structural adjustment and per-formance-based design.