混凝土连续梁桥自振特性影响因素对比分析

 王胜利

(西安公路研究院,陕西 西安  710065

  连续梁桥的自振特性研究是桥梁动力学研究中的一个重要课题。影响混凝土连续梁桥自振特性的因素众多,其中包括桥梁的跨径、孔数及主梁截面形式等。本文采用有限元分析方法,应用桥梁结构分析程序Midas Civil建立模型,对混凝土连续梁桥的桥跨结构进行动力分析。通过对三个因素进行对比分析,得出桥梁的跨径、孔数及主梁截面对混凝土连续梁桥自振特性的影响规律。

关键词混凝土连续梁桥自振特性有限元分析影响因素

中图分类号:U441          文献标识码:A

Factor Analysis of Free Vibration Characteristics

about The Concrete Continuous Girder Bridge

WANG Sheng-li

Xi‘an Highway Research InstituteXi‘an 710065China

Abstract: The natural vibration characteristics of the continuous girder bridge research is an important subject in the study of bridge dynamics. Many factors affect natural vibration characteristics of the concrete continuous girder bridgeincluding the span of the bridgethe number of holes and section of the main girder. This article uses the finite element analysis methodthrough setting up model of bridge with structure analysis program Midas Civilto analysis dynamic of the concrete continuous girder bridge. Through the study of the comparison and analysis of three factorsit is concluded that the span of the bridgethe number of holes and the main girder cross section on the influence law of natural vibration characteristics of concrete continuous girder Bridges.

Keywords: concrete continuous girder bridgenatural vibration characteristicsthe finite element analysisthe influencing factors