防屈曲支撑在高位机厂房抗震结构中的应用

Application of Buckling Proof Support to Aseismic Structure of Tall Steam Turbine Plant

某高位机厂房主体结构采用钢筋混凝土框架剪力墙结构,结构层高差较大,开洞较多且不规则,部分楼层设计荷载极大。与其紧邻的锅炉厂房采用纯钢框架支撑结构,该厂房内设备与高位机厂房中的汽机存在管道连接,为保障设备正常使用,抗震设计须满足规定的变形差目标。通过在高位机厂房与锅炉钢框架之间架设3道防屈曲支撑,使2座厂房间的管道可抵抗地震的作用。对防屈曲支撑进行了静力分析、模态分析和弹塑性时程分析,检验了结构的安全性。分析认为,防屈曲支撑方法在高位机厂房及工业建筑中值得被广泛推广应用。

The reinforced concrete frame shear wall structure is adopted as the main structure of a tall steam turbine plant with large height difference of the structural floor,many irregular openings,and great design load of some floors.The boiler plant adjacent to it adopts steel frame supporting structure.There is a pipeline connection between the equipment in the boiler plant and the steam turbine in the tall steam turbine plant.In order to ensure the normal use of the equipment,the seismic design must meet the specified target of deformation difference.By erecting three anti buckling supports between the tall steam turbine plant and the boiler steel frame,the pipes in the two plants can resist the action of earthquake.The static analysis,modal analysis and elastic-plastic time-history analysis are carried out to check the safety of the structure.The analysis shows that the buckling proof support method is worth popularizing and applying to the tall steam turbine plant and the industrial building.