人字撑对框架-核心筒结构的影响

Influence of herringbone support on frame-core wall structure

根据建筑功能需要,结构在34层需要实现竖向构件转换,但梁高受限,采用人字撑进行转换,对比分析单层人字撑和两层人字撑方案对结构整体指标的影响,同时分析人字撑对结构梁板和核心筒的影响。分析结果表明,两层人字撑方案对结构更有利,同时人字撑对核心筒剪力墙产生较大的水平推力,剪力墙需要采取设置型钢支撑的加强措施才能满足地震性能目标的要求,并加强相关节点构造,使节点构造满足节点后于构件破坏。

To satisfy the functional requirement of high-rise buildings,implementing a transformation into vertical members at the 34th floor is asked.However,due to the height limit of beams,a conversion is first proposed in the paper by using the herringbone support.Further,the influence of a single-layer herringbone support and a two-layer herringbone support scheme on the overall performance of the structure is compared and analyzed.Also,the influence of the herringbone on the structural beam and slabs as well as the core tube is analyzed.The analytical results show that the twolayer herringbone scheme is more favorable to the structure.But at the same time,the herringbone supports cause a large horizontal thrust to the core cylinder shear wall.Therefore,the shear wall is suggested to be enhanced with profiled steel to meet the seismic resistance and the structural joints also need to be strengthened not to fail before the component fails.