【作者】 严慧； 张明山；

【Author】 Yan Hui Zhang Mingshan (Zhejiang University)

【机构】 浙江大学；

【摘要】 本文对由单角钢组成的输电铁塔,考虑了节点偏心的影响,采用常加速度 Newmark 法对其几何非线性动力响应进行了分析,在每一时间步内采用 Newton-Raphson 法进行迭代。在风荷载和阶跃荷载作用下,对一个实际输电铁塔按不同结构体系情况的几何非线性受力特性进行了计算分析和比较,得出了一些有益的结论。更多还原

【Abstract】 In this paper,a computational procedure for predicting the geometric nonlinear dy- namic response of transmission towers comprised of angle members is presented.The method treats the angles as the space bar elements and general asymmetric thin-walled space beam ele- ments.In order to allow for any eccentroid of the joint connections,eccentric transformation ma- trix is derived.The Newmark constant-average acceleration method is employed,coupled with a Newton-Raphson iterative procdure at each time step.Under the wind loads and step loads,a practical transmission tower is analyzed and compared with different structural systems.Some valuable conclusions are obtained.更多还原