大跨双向空腹桁架结构在高烈度地区的工程应用

Engineering practice of long span two-way vierendeel truss structure in high intensity seismic region

针对德亨学校校园用地紧张的问题,利用风雨操场屋顶设置一块非标足球场。风雨操场屋盖采用大跨双向空腹桁架结构,为充分利用材料的性能,桁架上弦采用钢筋混凝土梁,下弦及腹杆采用矩形钢管。根据《云南省隔震减震建筑工程促进规定》(云南省人民政府令第202号),项目采用消能减震技术,设置黏滞阻尼器,结构各项指标均能满足规范要求,抗震性能满足预定性能目标。采用MIDAS软件对风雨操场大跨度上人屋顶楼板进行了舒适度分析,结果表明其楼盖结构的竖向振动频率、竖向振动加速度峰值均满足规范要求。并对楼盖结构的舒适度提出了相应的测试试验要求。

The roof of the gymnasium of Deheng School was designed as a non-standard football field for the land shortage.Long span two-way vierendeel truss structure had been applied on the roof of the gymnasium.For taking full advantage of materials,reinforced concrete beam had been designed as the upper chord and rectangular steel tubes had been used as the bottom chord.According to Yunnan Provincial Regulations on the Promotion of Architectural Engineering Seismic Base Isolation and Energy Dissipation(Yunnan Province People’s Government Order No.202 Document),seismic energy dissipation technology and viscous energy dissipation devices had been adopted in this project.All the structure indicators meet the structure design code requirements and the structure seismic performance achievs intended design targets.MIDAS software was used to carry out comfort analysis of the gymnasium long span roof.The results show that both structure vertical vibration frequency and vertical vibration acceleration peak value meet the code requirements.Also,the corresponding requirements for the roof structure comfort level tests were proposed.