新型钢-索楼梯的结构设计分析

Design of New Type Stair with Steel-cable Structure

对天津大学第25教学楼的新型钢-索楼梯进行了动力特性、抗震性能的计算分析以及楼梯结构构件和节点的设计。结果表明:该新型钢-索楼梯结构的自振频率呈密集型分布,结构地震反应很小,具有良好的抗震性能;风荷载一般对该新型钢-索楼梯结构结构设计起控制作用;设计的连接节点与计算模型吻合很好,能有效安全地传递内力。

A new type stair with steel-cable structure located in Tianjin University is researched,dynamic characteristics, seismic fortification capability and the design of the stair's members and joints are investigated.The results indicate that the natural vibration frequencies of the stair concentrate in a small range,and its seismic performance is very small,which means it will have a good performance when fall across the earthquakes; always the wind load plays a main effect on the design of the new stair; and the designed joints match with the analysis model very well,which can transform the internal force safely.