迁安文化会展中心平面张弦梁结构稳定性研究

Analysis and research on the stability performance of plane beam string structure

对于平面张弦梁结构设计,结构体系撑杆平面外稳定是结构设计的关键因素。以迁安文化会展中心平面张弦梁结构为分析实例,通过改变上弦梁与撑杆的连接方式及不同的预应力度、撑杆抗弯刚度、次梁抗弯刚度,建立仿真计算模型。考虑结构初始几何缺陷,对此类结构的稳定问题进行分析,得出了撑杆约束条件、预应力度对平面张弦梁结构整体稳定性能的影响规律。进一步提出基于结构体系稳定安全的节点力学性能化设计方法,对于直梁式平面张弦梁结构设计具有一定的指导意义。

For plane beam string structure, structure system bar＇s out-plane stability is the key factor for design. Base on the plane beam string structure of Qianan Culture Exhibit Center, considering structural initial geometric imperfection the stability performance of plane beam string structure is analyzed while the joint of stay bar, prestress ratio change. The effect rules of bar restriction condition, prestress ratio is obtained on overall stability of plane beam string structure. The join construction and mechanics performance design method are put forward for the structure. The conclusion can provide reference for other similar structural projects.