So, to study the seismic responses of long-span cable-stayed Bridges with multi-support excitation will be very important to seismic design and seismic safety.
因此，对大跨斜拉桥在多点输入下的反应开展研究，对进行正确有效的抗震设计，确保其抗震安全性具有非常重要的意义。
The system reliability analysis of long-span cable-stayed bridges is difficult because the failure of the structural systems may be happened in many different failure modes.
大跨度斜拉桥由于存在众多不同的失效模式，导致其体系可靠度分析比较困难。
The results show that the accuracy of analyzing geometrical nonlinearity of long-span cable-stayed bridges by the presented procedure is validated. The initial cable forces can be well determined.
建立的方法对大跨度斜拉桥进行几何非线性分析具有较高的计算精度．同时能够合理确定斜拉桥初始索力。
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