基于集中塑性铰模型的弯曲破坏锈蚀RC框架柱数值模拟方法  

Numerical simulation method for corroded RC frame columns of flexural failure based on lumped plastic hinge model

作　　者：董立国 郑山锁[1,2] 左河山 张艺欣 周炎 龙立[1] 李健[1] DONG Liguo;ZHENG Shansuo;ZUO Heshan;ZHANG Yixin;ZHOU Yan;LONG Li;LI Jian(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi’an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《建筑结构学报》2020年第4期140-150,共11页Journal of Building Structures

基　　金：“十二五”国家科技支撑计划(2013BAJ08B03);国家自然科学基金(51678475);陕西省重点研发计划(2017ZDXM-SF-093);陕西省教育厅产业化项目(18JC020);西安市科技计划项目(2019113813CXSF016SF026)。

摘　　要：出于近海大气环境下锈蚀RC框架结构抗震性能评估的需要,提出了基于集中塑性铰模型的锈蚀RC框架柱数值模拟方法,并通过对15根锈蚀RC框架柱试验结果进行回归分析,得到了该模拟方法所需的可考虑钢筋锈蚀影响的塑性铰弯曲(弯矩-转角)恢复力模型,进而采用OpenSEES有限元分析软件,建立了弯曲型破坏锈蚀RC框架柱的集中塑性铰模型。通过数值模拟结果与试验结果对比发现:采用该模拟方法得到的各试件的骨架曲线以及试件最终破坏时的累积耗能均与试验结果符合较好,表明所建立的锈蚀RC框架柱集中塑性铰模型能较为准确地反映锈蚀RC框架柱的受力性能和抗震性能,可用于近海大气环境下锈蚀RC框架结构抗震性能评估。In order to evaluate the seismic performance of corroded RC frames in the offshore atmospheric environment,a numerical simulation method of corroded RC frame columns based on the lumped plastic hinge model was proposed.The parameters of flexural hysteresis model( i. e. moment-rotation relationship) for the plastic hinge was developed by regression analysis toward test data of 15 corroded RC frame columns. Then,the lumped plastic hinge model for corroded RC frame columns subjected to flexural failure was established using OpenSEES as the finite element analysis software. By comparing the numerical simulation results with the experimental data,it can be found that both the skeleton curves and the cumulative energy dissipation of the specimens obtained by proposed method are in good agreement with the experimental data. Therefore,the lumped plastic hinge model for corroded RC frame columns proposed in this paper can reflect the mechanical and seismic performance of corroded RC frame columns accurately,indicating its adaptiveness for evaluating the seismic performance of corroded RC frame structure in the offshore atmospheric environment.

关 键 词：锈蚀RC框架柱 集中塑性铰模型 弯曲恢复力模型 有限元分析 抗震性能 

分 类 号：TU375.4[建筑科学—结构工程] TU311.41