某景观工程构筑物钢结构的设计与分析

Design and Analysis of Steel Structure of a Landscape Engineering Structure

采用Midas GEN软件对东岸塔、观鸟塔、树屋钢框架结构进行了一阶弹性分析、二阶弹性分析、稳定性分析等。主要计算指标、强度、稳定、变形、舒适度验算等均满足现行规范要求,结构安全可靠。计算结果表明:圆形平面建筑在风荷载和地震作用计算时,应按15°增量方向角进行包络计算,确定该荷载作用下的最大方向角;立面形态复杂的建筑结构,应进行二阶弹性分析;高宽比较大、第一周期也较大的圆形平面建筑,应进行临界风速的验算;对于曲柱,应进行稳定性验算。

The Midas GEN software is used to carry out first-order elastic analysis,second-order elastic analysis,stability analysis,etc.on the steel frame structure of the east bank tower,bird-watching tower and tree house.The main indicators,strength,stability,deformation,comfort check,etc.all meet the requirements of the current specification,and the structure is safe and reliable.Calculations proves that:in the calculation of wind load and earthquake action for circular plane buildings,the envelope calculation shall be carried out according to the 15°incremental direction angle,and the maximum direction angle under the load shall be determined;For building structures with complex facade morphology,second-order elastic analysis should be carried out;For a circular plane building with a large height-to-width ratio and a large first period,the critical wind speed should be checked;For curved columns,stability analysis shall be performed.