随州公共活动中心结构设计

Structural design of Suizhou Public Activity Center

随州公共活动中心是体型复杂的多馆合一式综合性城市公共建筑,具有平面单向超长、质量分布明显不对称、大跨度、大悬挑、顶板大开洞等特点。在对该结构体系进行了重难点分析的基础上,采用现浇预应力钢筋混凝土框架+屈曲约束支撑的减震结构体系,利用屈曲约束支撑解决平面单向超长造成的扭转,同时使结构形成多道抗震防线;大跨度楼盖采用预应力密肋楼盖控制结构高度;针对顶板大开洞的嵌固端问题提出了具体的加强措施。提出了针对该类结构的BRB布置及减震参数设计,通过有限元数值仿真分析论证了BRB的减震效果。针对超限情况提出了抗震性能目标及抗震措施。

The Suizhou Public Activity Center is a complex multi halls integrated urban public building with features such as unidirectional length,significantly asymmetric mass distribution,large-span,large overhang and large roof openings.Based on the analysis of key and difficult points,a seismic reduction structural system consisting of cast-in-place prestressed reinforced concrete frame and buckling constraint support was adopted.Buckling restrained brace was used to solve the torsion caused by plane unidirectional superlong,while forming multiple seismic defense lines in the structure.The large-span floor adopts pre-stressed ribbed floor to control the height of the structure.Specific strengthening measures have been proposed for the embedded end problem of large openings in the roof.A BRB layout and seismic reduction parameters design for this type of structure were proposed,and the seismic reduction effect of BRB was demonstrated through finite element numerical simulation analysis.Aiming at the situation of exceeding the limit,seismic performance targets and seismic measures have been proposed.