异形斜拉拱桥自振特性分析  

A Self-vibration Characteristics Analysis of Special-shaped Cable-stayed Arch Bridge

作　　者：李长平[1] 张宏祥[1] 孙全胜[1] 

机构地区：[1]东北林业大学,黑龙江哈尔滨150040

出　　处：《中国市政工程》2015年第3期19-21,110-111,共3页China Municipal Engineering

摘　　要：以正在建设的大连卧龙湾商务区滨海路凤翔河桥为例,利用大型通用有限元程序ANSYS和MIDAS/Civil建立异形斜拉拱桥的2种三维空间有限元模型,利用模型分析桥梁结构的自振频率和振型,分析相关因素对自振频率和振型的影响。通过分析可知,凤翔河桥采用异形拱要比湘江四桥采用的双肋无铰平行拱结构形式稳定。分析所得结论可为该桥后期施工和使用阶段的健康检测和维护提供技术参数和依据。Taking Binhai Rd.Fengxiang River Bridge of the construction period located in Wolongwan Business District,Dalian for example,the 2 kinds of 3D finite element models of special-shaped cable-stayed arch bridge are established by use of ANSYS & MIDAS/Civil.The bridge structure is analyzed by the 2 models focusing on the related factors' effects on the natural vibration frequencies & modes.Through the analysis,it is clear that the special-shaped arch of Fengxiang River Bridge is more stable than the parallel double rib hingeless arch of the Fourth Bridge of Xiangjiang River.The calculating results & conclusions can provide technical parameters & bases for the health detection& maintenance of the bridge in later period construction and service stages.

关 键 词：异形斜拉拱桥 自振特性 有限元 振型 

分 类 号：U448.29[建筑科学—桥梁与隧道工程]