不同因素对钢框架内承载性能的影响模型仿真  

Model Simulation of Influence of Different Factors on Bearing Capacity of Steel Frames

作　　者：牟星宇 李贤[1,2,3] 吴元周 吕恒林[1,2,3] MOU Xing-yu;LI Xian;WU Yuan-zhou;LV Heng-lin(State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology Xuzhou Jiangsu 221000,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221000,China;JiangSu Collaborative Innovation Center for Building Energy Saving and Construction Technology,Xuzhou Jiangsu 221000,China)

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221000 [2]中国矿业大学力学与土木工程学院,江苏徐州221000 [3]江苏建筑节能与建造技术协同创新中心,江苏徐州221000

出　　处：《计算机仿真》2022年第4期303-306,397,共5页Computer Simulation

基　　金：2016年徐州市重点研发计划(社会发展)课题(KC166SS088);国家自然科学基金(面上项目)(51978656)。

摘　　要：设计5个小跨高比钢框架内填混凝土剪力墙试件,采用ABAQUS有限元软件模拟分析低周反复加载下,不同跨高比、配钢率等因素对试件承载性能的影响,统计分析试件应力云图、骨架曲线、耗能能力等指标。实验结果表明,CBB1试件的危险应力区域最大,试件最容易破坏。CBB5试件危险应力区域最小,最不容易被破坏;试件跨高比和配钢率越高,试件骨架曲线弹性段越长,峰值荷载越高,试件承压性能越好;跨高比相同时,随着试件配筋率的增加,试件的屈服、峰值、破坏阶段耗能随之增加;配筋率相同时,随着跨高比增加,试件在屈服、峰值荷载阶段的耗能无较大波动变化,试件在破坏荷载阶段累积耗能呈大幅度增长趋势;试件跨高比、配钢率越大,试件刚度退化曲线越高,耐损伤能力越强。In this paper, five specimens of concrete-filled shear walls in steel frames with a small span-toheight ratio were designed. Under low cycle repeated loading, the effects of different span height ratios and steel ratios on the bearing property of specimens were analyzed in detail by ABAQUS software. The stress nephogram, skeleton curve and energy dissipation capacity of the specimen were also investigated. The results show that the CBB1 specimen has the largest dangerous stress area. CBB5 test piece has the minimum dangerous stress area. The higher the span height ratio and steel ratio, the longer the elastic section of the skeleton curve, the higher the peak load, and the better the bearing property. When the span height ratio is the same, the reinforcement ratio is directly proportional to the energy consumption in yield, peak value and failure stage. With the same reinforcement ratio, the change of span height ratio has no effect on the energy consumption in the yield and peak load stage but is directly proportional to the cumulative energy consumption in the failure load stage. The larger the span height ratio and steel ratio, the higher the stiffness degradation curve and the stronger the damage resistance.

关 键 词：小跨高比 钢框架 内填混凝土 剪力墙 承压性能 耗能能力 

分 类 号：TU398.22[建筑科学—结构工程]