三跨连续梁固定墩纵向水平力简化计算方法

A Simplified Algorithm of the Longitudinal Horizontal Force Borne by the Pier with the Fixed Bearing of the Three-Span Continuous Beam

三跨连续梁固定支座所在桥墩(简称固定墩)在温度变位、混凝土收缩徐变、汽车制动力等作用下,承受的纵向水平力计算较为复杂,常规的按照桥墩刚度分配进行计算的精确算法在遇到规模大、变化多的工程项目时,会变得费时费力。现通过对影响固定墩纵向水平力的各项参数进行分析,提出了一种简化算法,并进一步与精确算法进行比较。结果表明,两种算法结果基本接近,故本简化算法可用于实际工程中的初步设计和施工图设计阶段。

The calculation of the longitudinal horizontal force borne by the pier with the fixed bearing of the three-span continuous beam(referred to as the fixed pier)under the effects of temperature displacement,concrete shrinkage and creep,and vehicular braking forces is relatively complex.The accurate algorithm that conventionally relies on the stiffness distribution of the pier becomes time-consuming and laborious when dealing with large-scale engineering projects with numerous variations.This paper analyzes the various parameters affecting the longitudinal horizontal force on the fixed pier and proposes a simplified algorithm.Further comparing with the accurate algorithm,which shows that the results of the two methods are essentially close.This simplified approach can be used in the preliminary design and the execution design stages of actual engineering projects.