摘要
为研究地震作用下损伤累积对型钢高强混凝土框架节点抗震性能的影响,基于5榀型钢高强混凝土框架节点低周反复加载试验结果,分析节点构件损伤累积过程及其对刚度和强度的影响。从材料自身损伤入手,通过引入刚度影响系数考虑循环荷载作用下混凝土的单边效应,对Faria-Oliver本构模型进行改进,进而建立适应于型钢混凝土结构的材料损伤累积本构模型。同时基于该模型采用ANSYS分析软件对地震作用下的型钢高强混凝土框架节点进行数值分析,并与试验结果进行对比分析。结果表明:采用本文建立的材料损伤累积本构模型能较好地反映地震作用下型钢高强混凝土框架节点的损伤特性。在此基础上,进一步分析构件轴压比、配箍率、配钢率等设计参数对型钢高强混凝土框架节点抗震性能的影响。研究成果可为该类结构构件的抗震设计提供理论和技术支撑。
To investigate the effect of damage accumulation on the seismic behavior of steelreinforced highstrength concrete (SRHSC) frame joints under earthquake,five groups of SRHSC frame joints under low cyclic loading tests were studied,and the damage accumulation process and its effects on the stiffness and strength of the frame joints were analyzed.This study begins with the modeling of material damage.First,the unilateral effect of the concrete under a cyclic load is considered by introducing the stiffness influence coefficient,and then the FariaOliver constitutive model is improved to establish a material damage cumulative constitutive model adapted to the steelreinforced concrete structure.Based on the material damage constitutive model,a refined numerical analysis model was established for seismic SRHSC frame joints using ANSYS.Compared with the hysteretic curves of SRHSC frame joints under low cyclic loading,the results show that the cumulative damage model can reflect the damage characteristics of SRHSC frame joints under seismic loading.The influences of the parameters of axial compression ratio,stirrup ratio,and steel ratio on the seismic behavior of SRHSC frame joints were further analyzed.The research results can provide theoretical and technical references for the study of the cumulative damage of similar SRHSC frame joints under earthquake.
作者
王斌
吕斌
郑山锁
WANG Bin;LU Bin;ZHENG Shansuo(School of Civil and Architecture Engineering,Xi’an Technological University,Xi’an 710021,Shaanxi,China;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,Shaanxi,China)
出处
《地震工程学报》
CSCD
北大核心
2019年第5期1177-1185,共9页
China Earthquake Engineering Journal
基金
国家科技支撑计划项目(2013BAJ08B03)
国家自然科学基金项目(51108041,51678475)
陕西省科技厅科研计划项目(2018JQ5158)
陕西省教育厅科研计划项目(18JK0382)
关键词
型钢混凝土节点
损伤累积
材料本构
数值模拟
参数分析
steel reinforced concrete joints
damage accumulation
material constitutive relation
numerical simulation
parameter analysis
