钢筋混凝土框架抽柱托换加固后的抗震性能试验研究  

Experimental Study on Anti-seismic Performance of Reinforced Concrete Frame Structure Demolishing Column after Underpinning Reformation

作　　者：高群[1] 李家青[1] 俞伟根[1] 肖飞[1] 韦芳芳[2] 

机构地区：[1]江苏省建筑科学研究院有限公司,江苏南京210008 [2]河海大学土木与交通学院,江苏南京210098

出　　处：《淮海工学院学报（自然科学版）》2015年第3期57-63,共7页Journal of Huaihai Institute of Technology:Natural Sciences Edition

基　　金：江苏省科学技术厅基础研究计划(自然科学基金)-面上研究项目(BK2011836)

摘　　要：介绍了混凝土框架结构抽柱托换改造后的抗震性能试验研究.试验模型为3个两层两跨1∶3缩尺平面框架,分为未抽柱框架结构试验模型YKJ、预应力转换梁抽柱托换模型YYL和桁架抽柱托换模型HJ.通过对3个缩尺框架结构模型进行低周反复试验,观察各框架的破坏过程,得到各结构的破坏模式以及不同加固方案对结构抗震性能的影响.试验结果表明:低周反复荷载试验下,3个框架试件均属于延性破坏,破坏前有明显预兆;YYL和HJ框架的承载力相比YKJ框架均有不同程度的提高;对比抽柱托换前后的结构滞回曲线、延性、耗能能力等各项指标,可以看出抽柱托换改造后的结构滞回曲线饱满、延性较好、刚度更大.This article introduces the experimental study on anti-seismic performance of reinforced concrete frame structure demolishing column after underpinning reformation. The test models in- clude three 1 ： 3 scaled-down experimental models of two-story and two-span plane frames. One frame structure model is named as the model without demolishing column （YKJ）. Another model is named as the model of demolishing column underpinned by prestressed beam （YYL）. The last model is named as the model of demolishing column underpinned by truss （HJ）. Through the low cyclic experiments on these three scaled-down models, the failure process, the failure mode and the affect on anti-seismic behaviors of structures with different reinforcement options were obtained. The experimental results show that these three models occurred ductile failure with obvious omens, frames YYL and HJ had higher bearing capacity, more full hysteretic curve, better ductility and greater stiffness than that of YKJ.

关 键 词：框架抽柱 托换加固 抗震性能 低周反复试验 

分 类 号：TU375[建筑科学—结构工程]