强震下高层钢筋混凝土框架结构体系抗震耗能分析  

Time History Response Analysis of High-rise Reinforced Concrete Frame Structure System Under Strong Earthquake

作　　者：吕辉 肖冲 罗靓 LV Hui;XIAO Chong;LUO Liang(College of Civil Engineering and Architecture,Nanchang Hangkong University,Nanchang,Jiangxi 330063,China;Jiangxi Smart Building Engineering Research Center,Nanchang,Jiangxi 330063,China)

机构地区：[1]南昌航空大学土木建筑学院,江西南昌330063 [2]江西省装配式建筑与智能建造重点实验室,江西南昌330063

出　　处：《水利与建筑工程学报》2023年第3期158-164,共7页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金项目(52268031);2022年度江西省住房城乡建设领域科技项目计划(16)。

摘　　要：为研究框架结构在地震作用下的耗能机理,依据现有规范设计并建立10层、15层钢筋混凝土空间框架结构体系的三维实体精细有限元模型,并对该两种框架进行地震波弹塑性时程分析,分析不同水平地震波对框架结构层间位移角与塑性耗能的影响。结果表明:两种框架各层最大绝对位移随楼层与地震波峰值的增大而增大,各层的最大层间位移在2层、3层,多遇、罕遇地震下两种框架的最大层间位移角均未超过位移角限值1/50,当地震波烈度分别达到1 500 gal、1 200 gal时,10层、15层框架结构体系的最大层间位移角超过1/50;小震时,框架结构的总塑性耗能值很小,表明框架仍处于弹性状态,随着地震波加速度的增大,框架的总塑性耗能迅速增加,特别是地震强度超过1 000 gal以后;随地震波加速度的增大,框架的各部件的塑性耗能值增大,梁、柱的耗能占比增大而楼板的耗能占比减小。In order to explore the energy dissipation mechanism of frame structure under earthquake action,the 3D solid fine finite element model of 10 and 15 story reinforced concrete spatial frame structure system is designed and established according to the existing specifications,and the elastic-plastic time-history analysis of seismic wave is carried out for the two kinds of frames,and the influence of different horizontal seismic waves on the inter-story displacement angle and plastic energy dissipation of the frame structure is analyzed.The results showed that the maximum absolute displacement of each floor of the two frames increases with the increase of the peak value of the floor and seismic wave.The maximum inter-story displacement of each floor is in the second and third floors.The maximum inter-story displacement angle of the two frames under frequent and rare earthquakes does not exceed 1/50 of the displacement angle limit.When the seismic wave intensity reaches 1500 gal and 1200 gal,the maximum inter-story displacement angle of the 10th and 15th floor frame structure system exceeds 1/50.In small earthquakes,the total plastic energy consumption of the frame structure is very small,indicating that the frame is still in elastic state.With the increase of seismic wave acceleration,the total plastic energy consumption of the frame increases rapidly,especially after the earthquake intensity exceeds 1000 gal;With the increase of seismic wave acceleration,the plastic energy consumption value of each component of the frame increases,the energy consumption ratio of beams and columns increases,and the energy consumption ratio of floors decreases.

关 键 词：高层钢筋混凝土框架 楼层绝对位移 层间位移角 塑性耗能 时程响应 有限元 

分 类 号：TU375[建筑科学—结构工程]