粘贴钢板加固钢筋混凝土梁的可靠度分析  

RELIABILITY ANALYSIS OF THE RC BEAMS STRENGTHENED BY STEEL PLATES

作　　者：杨建江[1] 张敏[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《工业建筑》2017年第6期168-173,共6页Industrial Construction

摘　　要：对于粘钢加固钢筋混凝土构件进行了可靠度分析和剩余寿命预测。粘钢加固梁是由新、旧材料构成的组合构件,对粘钢加固梁的受力可分为原有部分与新加部分进行分析,研究了其原有部分的抗力衰减模型和新加部分与原有部分的荷载分配。介绍了两者的抗力、荷载统计参数及可靠指标计算方法。通过调节卸载程度及粘贴钢板的面积使原有部分与新加部分的可靠指标相协调,从而使两者具有相同的可靠度,并结合实例分析了卸载程度和钢板厚度对构件可靠指标的影响。最后基于可靠度对粘钢加固梁进行了剩余寿命预测。The reliability and residual service life of reinforced concrete member strengthened by steel plate were analyzed. RC beams strengthened by steel plate are composite member made of old and new materials. It was divided into old part and new part to analyze the stress condition. The resistance decrease model of the old part was analyzed,as well as the load distribution of the new part and the old part. The statistical parameters of resistance and load and reliability index calculation method were introduced. The results showed that by adjusting the unloading degree and steel plate area,the reliability index of the old part and the new part were coordinated so that both had the same reliability. The effect of steel plate thickness and unloading degree on reliability was analyzed with a practical project.Finally,the residual service life of RC beams strengthened by steel plate was predicted based on reliability.

关 键 词：可靠度 粘钢加固 卸载 滞后应变 剩余寿命 

分 类 号：TU375.1[建筑科学—结构工程]