巨型型钢混凝土框撑-核心筒结构性能分析

Analysis on performance of mega SRC braced frame-core wall structure

巨型型钢混凝土框撑-核心筒结构是由巨型型钢混凝土框架、巨型支撑、混凝土核心筒和伸臂桁架组成的一种具有多道抗震防线的新型超高层结构体系。对设置X形和倒V形巨型支撑以及设置巨型支撑的同时去除巨型梁下层次柱的结构体系进行了分析。结果表明:设置X形巨型支撑可以使结构的整体刚度明显增大,提高了框架作为第二道抗震防线的承载力;倒V形巨型支撑对结构刚度的贡献相对较小,但引起的局部构件内力突变也较小;设置巨型支撑的同时去除次柱会造成局部构件的内力突变,但可以使巨型框架的主、次结构受力更明确,提高主结构的效率,同时满足建筑大开间的要求。

Mega SRC braced frame-core wall structure is a new type of structural system for super high-rise buildings,consisting of mega SRC frame,mega braces,RC core wall,and outrigger trusses.Analysis was carried out on the performance of the structures with X type of mega braces and inverted V type of mega braces,and with mega braces but the common columns under mega beams were moved away.The results indicate that the integrated stiffness can be improved more effectively by using X type of mega braces than inverted V type of mega braces,but the mutation of internal forces of some members induced by using inverted V type of mega braces is relatively small.Moving away the common columns under mega beams will induce sudden changes of internal forces of several members,but make the load transfer path more clear between main structure and substructure,and higher material utilization of mega members is obtained.In addition,architectural requirement for open space can be satisfied.