高位收进、高位出挑高层建筑技术解决方案

Technical solutions for high-rise buildings with high-level retraction and high-level overhang

本工程为99.450m高层框架-剪力墙结构,具有高位收进、高位大悬挑、局部楼层中庭开洞等特点。设计中采用BRB支撑,调整高位收进、高位出挑带来的刚心偏离的问题,改善结构扭转位移比,同时增加结构抗侧力二道防线。采用型钢混凝土柱和钢悬挑梁解决高位出挑问题,并对大出挑部位进行竖向楼板舒适度分析。采用弹性时程对结构进行小震补充分析,采用动力弹塑性时程对结构在大震下的抗震性能分析,对减震子结构进行大震下极限承载力设计。为类似项目,提供技术方案参考。

This project is a 99.450m high-rise frame shear wall structure, which has the characteristics of high-level retraction, high-level overhang, and openings in the atrium of some floors. BRB brace is selected to adjust the problem of rigid center deviation caused by high retraction and high overhang, improve the torsional displacement ratio of the structure, and at the same time increase the second defenseline against lateral force.Steel reinforced concrete column and steel beam is used to solve the problem of high overhangs, and the comfort analysis of vertical floor slabs is carried out for large overhangs. The elastic time historyanalysis is used as a supplement analytical method under equently occurred earthquake. Through dynamic elastic-plastic analysis, the seismic performances under rare earthquake is evaluated, and the plastic damage of the weak parts and key components is determined. Provide technical solution reference for similar projects.