钢筋混凝土矩形柱地震破坏模式的概率分析  

Probability analysis of seismic failure modes of RC rectangular columns

作　　者：马颖 程学斌 吕瑞晗 许新勇 张建伟 MA Ying;CHENG Xuebin;Lü Ruihan;XU Xinyong;ZHANG Jianwei(School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Key Laboratory of Building Collapse Mechanism and Disaster Prevention,China Earthquake Administration,Sanhe 065201,China;Beijing Survey,Design and Research Institute Co.,Ltd.,China Power Construction Group,Beijing 100024,China)

机构地区：[1]华北水利水电大学水利学院,郑州450046 [2]中国地震局建筑物破坏机理与防御重点实验室,河北三河065201 [3]中国电建集团北京勘测设计研究院有限公司,北京100024

出　　处：《振动与冲击》2022年第5期49-54,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金青年项目(51408223);国家自然科学基金面上项目(51979109,51679091);中国地震局建筑物破坏机理与防御重点实验室开放基金资助项目(FZ211102);河南省高等学校重点科研项目计划(22A560003)。

摘　　要：鉴于破坏模式对既有钢筋混凝土柱抗震性能评价和震后恢复决策的重要性,从美国太平洋地震研究中心钢筋混凝土柱抗震性能试验数据库(PEER-Structural Performance Database)中收集214根钢筋混凝土矩形截面柱的拟静力试验数据,分析了弯曲、弯剪或剪切三种破坏模式的破坏特征及主要影响因素。根据钢筋混凝土柱塑性铰区截面剪力需求与抗剪承载力的关系,计算了发生三种不同破坏模式时剪力需求与抗剪强度的比值,并分别给出了相应的概率分布函数。结果表明,基于剪力需求和抗剪强度比值的概率分析能够合理地反映钢筋混凝土柱的地震破坏模式。Here, in view of importance of failure mode to aseismic performance evaluation and post-earthquake recovery decision-making of existing RC columns, pseudo-static test data of 214 RC rectangular cross-section columns were collected from the PEER-structural performance database of US Pacific seismic research center to analyze failure characteristics and main influencing factors of their 3 failure modes including bending, bending-shear and shear. According to the relationship between section shear demand and shear-bearing capacity in plastic hinge area of RC columns, ratios of shear demand to shear strength were calculated when 3 different failure modes happen, and the corresponding probability distribution functions were given, respectively. The results showed that the probability analysis based on the ratio of shear demand to shear strength can reasonably reflect seismic failure modes of RC columns.

关 键 词：钢筋混凝土(RC) 矩形截面柱 破坏模式 概率分布 剪力需求 抗剪强度 

分 类 号：TU375.3[建筑科学—结构工程]