武威市游泳馆结构设计

Structural design of Wuwei Natatorium

武威市游泳馆采用框架-排架结构,屋面采用空间钢桁架,存在长宽比较大、扭转偏大、楼板不连续、各处刚度差异较大等不规则情况。通过设置屈曲约束支撑、屋面水平钢支撑等措施加强了结构整体性和抗扭能力;通过控制基底零应力区,保证排架的抗倾覆能力;根据性能设计提出抗震性能目标,采用多种有限元软件进行计算分析,保证了结构的抗震性能。

Frame-bent structure with spatial steel truss roof is adopted in Wuwei Natatorium. It is an irregular structure with large length-width ratio, large torsional effects, discontinuous floors, and unevenly distributed stiffness. To strengthen the integrity and anti-torsion capacity of the structure, buckling restrained braces and horizontal steel braces on roof were set. Overturning stability was ensured by controlling the zero stress areas. Seismic performance objectives were proposed according to performance-based design. The structure was analyzed by several FEM analysis programs to ensure the seismic safety.