三拱肋钢管混凝土系杆拱桥—江海大桥动力特性分析

Triple Arch Rib Concrete-Filled Steel Tube Tied Arch Bridge-Analysis of Jianghai Bridge Dynamic Characteristics

结合申张线金港段江海大桥的工程实例,采用有限元法建立三肋钢管混凝土系杆拱桥动力特性分析模型。为了了解该桥动力性能,采用子空间迭代法计算得到桥梁前15阶振动频率及振型,计算结果为该桥提供设计依据。提供了三肋钢管混凝土系杆拱桥的自振频率及振型特征,这对了解该类桥梁的动力性能有着重要参考价值。

In line with engineering example of Jianghai Bridge in Jingang section of Shenzhang finite element method to build a mode to analyze the dynamic characteristics of triple arch rib concrete line, we use - filled steel tube tied arch bridge. In order to understand the dynamic performance of the bridge, we take the subspace iteration method to calculate vibration frequencies and modes of the first 15 levels of the bridge. The results provide design basis for the bridge. It also provides natural frequencies and mode shapes characteristic of triple arch rib concrete - filled steel tube tied arch bridge, which has an important reference value to understand the dynamic performance of such bridges.