摘要
结合海洋平台工程实践,利用有限元计算软件对跨度为50 m的空间钢结构栈桥进行了动力分析和地震反应分析,总结了三种作用状况下构件的内力响应,并进行了大量的计算分析,结果表明:在极限风荷载、自重和活载条件下,结构的最大拉应力发生在下弦跨中背风面;在地震作用下,由于横向弯曲振动的影响,结构上弦和下弦的应力都有不同程度的波动,且下弦的应力波动较大。
Combining the practice of offshore platform engineering, the static and dynamic analysis and seismic analysis of the reac- tion for the 50 m-span cross-bridge with finite element analysis software is done, the dynamic response of the components of under three load cases are summarized. The results show that the maximum stress is at the bottom chord bar under the condition of ultimate wind load, self weight and the live load. Because of the effect of the lateral bending vibration, the upper and bottom chord bar appears fluctuation and the bottom chord bar＇s stress fluctuation is more strong.
出处
《海洋技术》
北大核心
2009年第2期84-87,共4页
Ocean Technology
基金
国家自然科学基金项目(50809047)
关键词
栈桥
力学分析
cross-bridge
mechanical analysis
