摘要
地铁上盖建筑底部大空间常会导致竖向构件不连续,结合其他因素导致结构超限,需进行性能化设计方可保证整体结构的安全性。本文对某8度区大底盘多塔高层住宅设计进行了介绍,前期找出结构关键部位制定性能指标,计算分析当底部大底盘部分墙肢无法落地时,通过增设短墙肢,底部转换梁、转换柱采用型钢混凝土加强,主要墙肢采用钢板剪力墙等措施,使多塔结构在小震弹性计算时承载力验算满足规范要求,性能化设计满足预定指标。大震下进行动力弹塑性分析,大部分墙体属于轻度~中度破坏,局部墙肢破坏严重,连梁大部分损坏严重形成铰机制,耗能明显。框架结构整体损伤不大,未出现贯通成片的严重损坏,满足大震性能目标需求,验证了结构布置的合理性。
The large space at the bottom of the superstructure of the subway often leads to discontinuous vertical components,and combined with other factors,the structure exceeds the code specification,and performance-based design is required to ensure the safety of the overall structure.This paper introduces the design of a multi-tower high-rise residential building with a large chassis in site for seismic fortification level 8.In the early stage,the key parts of the structure were found to formulate performance indicators,and the calculation and analysis were carried out.When the part of the walls in the bottom of the large chassis could not be landed,the transformation columns are used for steel reinforced concrete columns,and the main wall piers are adopted for steel plate shear wall,so that the bearing capacity of the multi-tower structure can meet the specification requirements through the elastic calculation under frequent earthquakes loading,and the performance-based design can meet the predetermined index.The dynamic elastic-plastic analysis was carried out under the rare earthquakes loading.Most of the walls were damaged slightly or moderately,only local part of the wall piers were damaged severely,and most of the coupling beams were damaged severely to form plastic hinges,and the energy consumption was obvious.The overall damage of the frame structure is not large,and there is no serious damage to penetrate into pieces,which meets the target requirements of rare earthquake performance.The rationality of the structural layout is verified.
作者
黄存智
Huang Cun-zhi(National Engineering Research Center of Building Technology,Beijing 100013,China;China Aeademy of Building Rescarch Co.Ltd,Beijing 100013,China)
出处
《工程抗震与加固改造》
北大核心
2024年第2期130-137,共8页
Earthquake Resistant Engineering and Retrofitting
关键词
大底盘多塔结构
弹性时程分析
性能化设计
动力弹塑性
抗震性能分析
large chassis multi-tower structure
elastic time history analysis
performance-based design
dynamic elastic-plastic
seismicperformanceanalysis
