大跨度桥梁分析方法的一些进展

介绍了大跨度桥梁设计中抗震,抗风分析和振动控制技术的一些近期进展。首先,针对大跨度桥梁的地震响应分析的特点,介绍了精胡度高效平稳／非平稳随机振动计算方法;其次,介绍了基于有限元模型用于求解大跨度桥梁颤振和抖振问题的理论模式体系及全桥三维风振分析方法;最后,针对大跨度桥梁地震响应控制和风振响应控制问题,介绍了各类控制方案的应用和研究进展,概述了主动控制系统实现的多种控制策略及算法研究方面的进展。

Development of analytical method for long-span bridges

The recent development of the earthquake response and wind\|induced vibration analyses as well as vibration control of long\|span bridges are introduced in this paper. Firstly, the stationary/non\|stationary random vibration computation method with high precision and efficiency is presented in the light of the characteristics of the earthquake response analysis. Secondly, a systematic formulation as well as its computational algorithm for bridge flutter and buffeting analyses which is featured by finite element method is presented. Lastly, for the earthquake response control and the wind\|induced response control, the applications and the developments of control schemes are introduced. In addition, the development of the active control schemes and algorithm researches are also presented.