某单跨框架结构抗震加固方案

Seismic Strengthing Scheme of a Single Span Frame Structure

针对某单跨框架结构抗震承载力和构造不足的问题,进行了几种加固方案的对比,确定增设支撑加固方案。考虑二次受力和不考虑二次受力的竖向荷载作用的内力分析结果表明,两种方法计算内力相差较大,实际工程中采用考虑二次受力是必要的。在分析支撑位置和截面尺寸对结构内力、周期、侧移影响规律基础上,确定了支撑的设计参数。

Three reinforcement schemes for a single-span-frame strucuture are put forward to improve the insufficient seismic bearing capacity and unreasonable structure. After the comparison of the advangtages and disadvantages,the additional bracing reinforcement scheme is determined. Internal force analysis on strengthened structure is carried out by considering two-stage loading method and onestage loading method respectively,and the results are much difference,so it is necessary to use two-stage loading analyzing method in practical engineering design. Based on the analysis of the influence on the internal force,period and lateral displacement by position and size of the support,the more reasonable value of design parameters are adviced.