简支T型梁桥动力分析与减振优化设计  

Dynamic Analysis and Optimal Vibration-damping Design of Simply Supported T-Beam Bridge

作　　者：孙金坤[1,2] 吴柯衡 刘杰[1,2] 念红芬[1,2] 李学伟[1,2] 

机构地区：[1]攀枝花学院土木与建筑工程学院,四川攀枝花617000 [2]攀枝花市工程结构技术研究中心,四川攀枝花617000

出　　处：《工程抗震与加固改造》2015年第2期46-51,74,共7页Earthquake Resistant Engineering and Retrofitting

摘　　要：应用ANSYS软件建立有限元模型,研究了移动荷载对简支T型梁桥动力响应的影响,计算分析了不同运行速度的移动荷载通过简支T型梁桥引起的动力响应。结果表明,随着运行速度的提高,位移响应也相应提高;随着梁联数的增加,自振频率相应增加。基于振动分析,对简支T型梁桥的减振方案进行优化设计。分析表明,通过改变截面减小位移响应的方法减振效果不太明显,而采用X型横向连接方式减振效果优于传统的横向连接减振方式。研究结果可为简支T型梁桥结构的减振设计和施工提供理论参考。In this paper,ANSYS software is used to build the finite element model,upon which the effect of moving load on the dynamic response of simply-supported T-beam bridge is studied,and furthermore,the dynamic response,generated when traveling load at varied running rate travels through a simply-supported T-beam bridge,is calculated and analyzed. The results show that with the increase of traveling speed,the displacement response will accordingly increase; and with the increase of connecting beams in number,the natural vibration frequency will also increase. Based on the vibration analysis,an optimal design of effective vibration damping control for simply-supported T-beam bridge is proposed. The analysis shows that the vibration damping effect from the way to reduce displacement response by changing the cross-section is not ideal,while the X-type cross binding approach generates better results than the conventional cross binding vibration damping means. The study results can serve as theoretical reference for the vibration damping design and construction of simply-supported T- beam Bridge.

关 键 词：ANSYS有限元 简支T型梁桥 动力响应 减振设计 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]