【摘要】 Geiger索穹顶结构是由索杆膜结构组成的柔性体系,该结构属于对振动敏感的结构,膜结构作为索穹顶的一部分在受力分析中必不可少,并且膜面初始预应力的大小直接影响结构的内力,因此本文以两种不同的膜面预应力作为初始条件进行非线性有限元找形,对索杆膜结构的整体找形结果进行自振特性分析和El Centro波作用下的地震时程分析,结果表明改变膜结构的初始预应力可以有效地增强结构的刚度,提高结构的抗震能力。更多还原

【Abstract】 Geiger cable dome is a flexible structure including cable strut and membrane which is sensitive to vibration. The initial prestress of membrane directly affects structural initial force,so two kinds of initial prestresses on membrane are considered in this paper to realize form-finding of the whole structure,to obtain vibration characteristics and time history analysis under El Cenro. The solutions show that: increasing the initial prestress on membrane can strengthen the stiffness of structure and improve structural seismic capacity.更多还原