首都滑冰馆结构改造设计研究

Research on structural reconstruction design of Capital Skating Hall

首都滑冰馆建造于20世纪80年代,主体结构为60榀倒L形预应力刚架,地下1层顶板采用整体预应力装配式板柱结构,屋面采用空间梭形桁架结构。介绍了首都滑冰馆结构概况以及冬奥会改造的内容,对结构初始建造、1~3层附属结构逐步拆除过程进行施工分析,提出拆除过程对现有结构内力的影响,特别是看台斜梁构件拆除对主体结构的影响,继而制定监测要求及控制标准,确保结构拆除过程安全可控;研究了整体预应力装配式板柱结构的受力特点及预应力损失情况,针对该结构加固、拔柱改造等要求,提出相应的加固做法,为此类型结构的改造提供了借鉴。

Capital Skating Hall was built in the 1980s.Its main structure include 60 pieces of inverted L-shaped prestressed rigid frame,of which the top layer of the underground layer adopted the integral prestressed prefabricated slab-column structure and spatial shuttle truss structure was adopted in roof.The general situation of the structure of Capital Skating Hall and the content of the reconstruction for the Winter Olympic Games were introduced.The initial construction of the structure and the gradual demolition of the 1~3 storey subsidiary structure were analyzed,and the influence of the demolition process on the internal force of the existing structure was put forward,especially the influence of the demolition of the inclined beam on the main structure,and then the monitoring requirements and control standards were formulated to ensure the safety and controllability of the demolition process.The mechanical characteristics and prestress loss of the integral prestressed prefabricated slab-column structure were studied,and the corresponding reinforcement methods were put forward according to the requirements of the structure reinforcement and column pulling-out reconstruction.This provides a reference for the reconstruction of this type of structure.