影响钢-混凝土组合梁桥横向分布系数的相关参数研究

Study on relevant parameters affecting the transverse distribution coefficient of steel-concrete composite beam bridge

为研究影响钢-混凝土组合梁桥横向分布系数的相关参数,利用有限元软件ANSYS建立钢-混凝土组合梁桥模型,研究不同的桥面板厚度、钢梁高度、主梁数和剪力连接件强度对钢-混凝土组合梁桥的横向分布系数的影响.结果表明,增大混凝土桥面板厚度导致横向分布系数减小,且边梁的减小幅度大于中梁的减小幅度;增大桥梁跨度,使得横向分布系数下降幅度较为明显,且边梁横向分布系数的下降幅度比中梁更为明显;钢-混凝土组合梁桥的主梁数量与横向分布系数成反比,并且主梁数量对中梁的影响大于边梁;增大剪力连接件强度可以有效降低横向分布系数.

In order to study the relevant parameters that affect the transverse distribution coefficient of steel-concrete composite girder bridges,a steel-concrete composite girder bridge model is established by using the finite element software ANSYS.The effects of different deck thickness,steel beam height,number of main beams and shear connector strength on the transverse distribution coefficient of steel-concrete composite girder bridges are studied The results show that the transverse distribution coefficient decreases with the increase of the thickness of the concrete deck,and the decrease of the side beam is greater than that of the center beam;Increasing the bridge span makes the transverse distribution coefficient decrease more obviously,and the decrease of the lateral distribution coefficient of the side beam is more obvious than that of the middle beam;The number of main beams of steel-concrete composite girder bridge is inversely proportional to the transverse distribution coefficient,and the number of main beams has greater influence on the center beam than the side beam;Increasing the strength of shear connectors can effectively reduce the transverse distribution coefficient.