带横梁的分离式双箱斜拉宽桥的横梁受力分析  

Mechanical behavior of transverse beams of cable stayed bridge with separated double-box girder

作　　者：陈昀明[1] 王卫涛[2] 吴庆雄[1] 陈宝春[1] 

机构地区：[1]福州大学土木工程学院,福建福州350108 [2]杭州市城建设计研究院,浙江杭州310001

出　　处：《广西大学学报（自然科学版）》2012年第5期845-852,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：科技部国际合作项目(2009DFA72220)

摘　　要：为了解横梁对宽桥受力状态的影响,以带横梁的分离式双箱主梁的某斜拉宽桥为背景工程,利用ANSYS建立该桥的全桥有限元模型和主梁局部的实体有限元模型,通过计算值比较,两者吻合良好,验证了全桥有限元模型的正确性。通过修改该模型的横梁的方式,分析了横梁设置数量和刚度变化等对全桥受力性能的影响。研究结果表明,设置无索横梁可有效地减小主梁的横桥向应力和有索横梁应力,但横梁刚度增大到一定程度后,其对结构的有利作用会减弱,背景工程的横梁设置合理可行。In order to discover the effect of transverse beams on the mechancal behavior of wide bridges, finite element models of the entire bridge and the main girder were established in ANSYS, based on a cablestayed bridge with a separated doublebox main girder and transverse beams. The stress distribution of the transverse beams given by the two finite element models was in good agree verifying the correctness of the finite element model of the entire bridge. By changing the set up and the stiffness of the transverse beams in this model, the effect of the transverse beams on the behavior of this cablestayed wide bridge was analyzed. Results showed that with the setup of trans verse beams in noncablestayed position, the horizontal stress of girder and the stress of transverse beams in cablestayed position could be reduced significantly, but when the stiffness of transverse beams reached a certain degree, the improvement effect could be reduced. The setup of transverse beams in the referred bridge was reasonable and feaslhlo..

关 键 词：宽桥 分离式双箱主梁 横梁 空间受力 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]