无缝桥梁各关键结构刚度协调分配研究

张己存

摘要:

随着科学技术的发展，交通行业的技术水平也在稳步提高，针对桥头跳车的问题，无伸缩缝桥梁研究逐渐被用到桥梁实际应用中。而无缝桥梁又称为无伸缩缝桥梁，分为材料无伸缩缝和结构无伸缩。结构无伸缩缝桥梁的的台后土压力会直接传至梁板等上部结构，桥梁各构件的刚度不同，台后土压力对无伸缩缝桥梁产生的效应也不相同。本文依据研究内容及结构刚度基本理论，建立了只包含梁板、桥台及桥台桩基三个结构的单跨整体式无缝桥梁，分别单一的改变三者刚度，得出其刚度变化对结构受力的影响，并拟合绘出的影响变化曲线得到四元函数，归纳了求解刚度协调分配系数的方法。

Abstract:

With the development of science and technology, the technical level of the transportation industry is also steadily improving. In view of the problem of car jumping at the bridge head, the research on bridges without expansion joints has gradually been used in the practical application of bridges. The seamless bridge, also known as the bridge without expansion joints, is divided into no expansion joints in materials and no expansion in structures. The post-platform earth pressure of a bridge without expansion joints will be directly transmitted to the superstructure such as beams and slabs. The stiffness of each component of the bridge is different, and the effect of the post-platform earth pressure on the bridge without expansion joints is also different. Based on the research content and the basic theory of structural stiffness, this paper establishes a single-span integral seamless bridge that only includes three structures: beam-slab, abutment and abutment pile foundation. The structure is affected by the force, and the quaternary function is obtained by fitting the drawn influence curve, and the method of solving the coordination distribution coefficient of stiffness is summarized.