对施工阶段套建增层巨型框架的内力分析

为了解传统的分析方法在施工阶段套建增层巨型框架内力计算中的误差,找出合理的分析方法,并了解不同施工方法对构件内力的影响,以一个典型套建增层巨型框架为例,利用有限元分析方法,分别采用三种分析方法分析了三种施工方法条件下构件在施工阶段的内力变化.采用不同分析方法计算构件施工完成时刻内力值,按传统方法分析时,计算值的误差较大;按简单模拟施工的方法进行分析,在很大程度上能够改善传统分析方法不合理的情况.对不同的施工方法而言,采用逐层施工法时,构件在施工中产生的内力峰值与施工完成后的内力终值相差悬殊,采用巨梁层自承重施工法和主次施工法时,构件的内力峰值与内力终值接近.

Analysis on internal force of outer-jacketing mega frame for story-adding during construction

To make clear the error of traditional analysis method in calculating the internal force of outer-jacketing mega frame for story-adding during construction, find out the reasonable analysis methods and master the influence of different construction methods on internal force of member, taking an typical of outer-jacketing mega frame for story-adding as an example, its internal force of member is analyzed adopting three analysis methods and three construction methods by using Finite Element Method. The analysis results show that: for different analysis methods, when analyzing the internal force of member at the time the construction is over, using traditional method, the error is bigger, using the simple simulation construction method, the condition is better, and the irrationality cased by traditional method can be improved. for different construction methods, using the story-by-story method, the peak value of internal force of member during construction and the final value after the construction is over is greatly different, using the story-by-story method of self-supporting huge-beam-story and the primary and secondary method, the peak value of internal force of member and the final value is similar.