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采用三参数粘弹性模型,对钢-混凝土组合梁桥在长期荷载作用下的徐变性能进行了研究,并采用三维虚拟层合单元法研究这种效应以及截面由不同材料组成时结构的受力特点。在实验研究的基础上,拟合了粘弹性模型中的参数,并对钢-混凝土组合梁桥在长期荷载作用下的竖向变形和轴向应变进行了研究,通过对计算和试验结果进行对比分析验证了该法的准确性。
The three-parameter viscoelastic model is used to study the creep behavior of steel-concrete composite beam bridges under long-term load. The three-dimensional virtual laminated element method is used to study the effect and the force of the structure when the cross-section is composed of different materials Features. Based on the experimental study, the parameters in the viscoelastic model are fitted and the vertical deformation and axial strain of the steel-concrete composite girder bridge under long-term load are studied. By comparing the calculation results with the experimental results The analysis verified the accuracy of the method.