预防混凝土曲线箱梁桥爬移的对策研究

1福建船政交通职业学院,福州 350007 2福州市交通建设集团有限公司,福州 350001

曲线箱梁桥,横向爬移,有限元,预应力,预防对策

Study on countermeasures of preventing concrete curved box girder bridge from creeping
LI Bing1,HU Yu-liu2

1 Fujian communication technology college,Fuzhou 350007,China 2 Fuzhou traffic construction group Co.,Ltd., Fuzhou 350001,China

curved box girder bridge,lateral creeping,finite element,pre-stress,preventive countermeasures

备注

混凝土曲线箱梁桥在永久作用和可变作用下会产生爬移等病害的原因并不单一,现有研究和分析认为,曲线梁桥的爬移是在各类荷载作用下,梁体产生不可恢复的变形逐渐积累而成.本文以某高速公路互通匝道桥为例,通过有限元分析,从横向爬移机理出发,研究了各主要因素对曲线箱梁桥的影响,进而从设计和施工上提出预防混凝土曲线箱梁桥爬移的可行性对策.

There are many reasons for climbing drift of concrete curved box-girder bridge under permanent action and variable action.The existing research and analysis stated that the drift of curved girder bridge is caused by permanent deformation of girder under different loads.Based on a highway interchange ramp bridge as an example,through finite element analysis,and beginning with the mechanism of lateral drift,this paper study the effect of main influencing factors on the curved box-girder bridge,and propose some feasible countermeasures in terms of design and construction,which may prevent concrete curved box-girder bridge from the lateral creeping.