连续斜交箱梁桥剪力滞效应分析  

An Analysis of the Lagging Shear Effect of the Continuous Skewed Box Girder Bridge

作　　者：任荣旭 卜建清[2] 

机构地区：[1]石家庄铁道大学交通运输学院,河北石家庄050043 [2]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《国防交通工程与技术》2015年第4期26-28,21,共4页Traffic Engineering and Technology for National Defence

基　　金：河北省自然科学基金(E2013210104);河北省高校百名创新人才支持计划(Ⅱ);河北省高层次人才资助项目(A201400213)

摘　　要：斜交箱梁桥在我国应用广泛,其剪力滞效应不能简单的采用正桥的相关理论。利用有限元软件ANSYS建立连续斜交箱梁桥三维实体单元模型,系统地分析了斜交箱梁桥横向剪力滞效应的变化规律和斜度、宽跨比的参数变化以及不对称加载对剪力滞系数的影响,并编制了剪力滞计算表格,为工程实际和设计研究提供了参考。研究结果表明,斜交箱梁桥横向剪力滞效应变化明显,斜度、宽跨比、不对称加载对剪力滞系数影响很大,生产实践中应充分重视斜交箱梁桥的剪力滞效应。The skewed box girder bridge is widely used in our country, to the lagging shear effect of which the main-bridge-relat- ed theory is not simply applicable. In this case, a three-dimensional concrete unit model for a continuous skewed box bridge is es- tablished in the light of the finite element analysis software ANSYS in the paper, with the varying law and changes in the pa- rameters of the gradient, the width-span ratio and the effect of the asymmetric load on the coefficient of the lagging lateral shear effect systematically analyzed and the calculation table for the lagging shear effect made. The results of our research show that the change in the lagging lateral shear effect of a skewed box girder bridge is obvious,and the gradient, the width-span ratio and the asymmetric load all have a great effect on the coefficient of the lagging shear effect,which makes us realize that enough at- tention has to be paid to the lagging shear effect of the skewed box girder bridge in practical production. The paper may provide a useful reference for practical projects and design and research work.

关 键 词：连续斜交箱梁 剪力滞效应 斜度 宽跨比 不对称加载 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]