Abstract: The cantilever slab designed by Chinese highway bridge specification (JTJ-023-85) shows unrationality and unadaptability in the case of long cantilever side slab.In this paper,Sawko's and Bahkt's practical formulae which give up the concept of effective width of slab are introduced.From the calculation and comparison in the illustrative example,it shows that the value of the moment existing at the root of the long cantilever side slab,is on the unsafe side.Some experimental results and spline finite strip analysis are presented.Finally a formula with A'values is given to improve Bahkt's results.

Key words: cantilever deck, effective width, calculating method, design code, Sawko's method, Bahkt's method, model test, parameter correction

摘要： 本文讨论悬臂行车道板按我国桥梁规范JTJ-023-85规定的不合理处以及对长悬臂的不适应性,同时介绍沙柯、巴赫等人摒弃有效分布宽度概念而采用的实用计算公式及有关表格,并通过示例及对比看出对长悬臂行车道板沿用JTJ-023-85计算结果偏于不安全性。最后给出模型试验与样条有限条计算结果的对比,并对巴赫公式中A'值提出具体意见。

关键词: 悬臂板, 有效分布宽度, 计算方法, 设计规范, 沙柯法, 巴赫法, 模型试验, 参数修正