大跨径连续刚构梁高渐变规律的探讨

Disscussion on Height Change Laws of Large-Span Continuous Rigid-Frame Beam

结合珠江三角洲某高速公路上一座大跨径连续刚构设计,通过分析比较不同指数的抛物线梁高渐变规律对结构受力产生的影响,综合考虑大跨、宽幅宽箱结构纵、横向受力特性,提出合适的确定抛物线指数的原则和方法。

Combined with the design for a large - span continuous rigid - frame of a expressway in Pearl River Delta, the influences caused by height change laws of parabolic girder at different index on structural force are compared through the analysis. Longitudinal and horizontal mechanical characteristics of large - span and wide - breadth wide box structure are taken into consideration comprehensively, and appropriate principle and methods for determing parabolic index are proposed.