大跨径箱形轨道梁在港口工程中的设计与应用

Design and application of long-span box track beam in port engineering

大跨径预应力后张法箱形轨道梁在港口工程中的应用已呈发展趋势,但港口工程规范对其设计要求尚未做出详细规定,且目前对这种结构的计算研究仍然较少。结合工程实例,利用有限元软件对大跨径预应力箱形轨道梁进行力学数值模拟分析研究,并考虑竖向非线性梯度温度效应对轨道梁内力的影响。该方法能较全面、准确地反映构件各个部分的应力和位移分布情况,验算结果可靠。

The application of long-span post-tensioned pre-stressed box track beam in port engineering has a trend of development,but the design requirements of port engineering are not specified in detail,and the research of this structure calculation is still less at present. Combining with the engineering example,according to the port and highway engineering codes and related literatures,we apply the finite element software to numerical simulate and analyze the mechanical property of long-span pre-stressed box track beam,meanwhile we consider the influence of the vertical nonlinear gradient effect on the internal force. This method can reflect the stress and displacement distribution of each part of the component comprehensively and accurately,and the verification result is reliable.