高层建筑结构设计中的风荷载效应与控制策略

为深入探究高层建筑结构设计风荷载效应及控制策略,以风荷载作用下高层建筑结构稳定性,疲劳寿命以及振动舒适度为研究对象,提出结构形态优化,动力特性调整,材料创新和智能化控制的控制策略。采用理论分析,数值模拟与实验验证相结合的手段,对风荷载效应理论基础及在高层建筑中的响应机理进行研究,并对已有理论模型进行适用性与局限性分析。研究成果为高层建筑安全设计提供理论依据与实用指导,对于增强高层建筑抗风性能有着重要的指导意义。

Finite element model for arch bridge vibration dynamics considering effect of suspender length adjustment on geometry stiffness matrix

In this paper, we established a finite element (FEM) model to analyze the dynamic characteristics of arch bridges. In this model, the effects of adjustment to the length of a suspender on its geometry stiffness matrix are stressed. The FEM equations of mechanics characteristics, natural frequency and main mode are set up based on the first order matrix perturbation theory. Applicantion of the proposed model to analyze a real arch bridge proved the improvement in the simulation precision of dynamical characteristics of the arch bridge by considering the effects of suspender length variation.