秦  云  张耀春  王春刚
(哈尔滨工业大学土木工程学院  150090)

[提要]  以工程实践中常用的6m跨C160×70×20×3卷边檩条为研究对象，在风吸力作用下，考虑檩条的支座连接条件、拉条刚度、拉条布置位置、屋面对檩条有无侧移约束作用等因素，采用ANSYS5.7通用程序进行了大量双重非线性分析，给出了各种荷载条件下的拉条内力、檩条的极限承载力和轴压-横向荷载线性相关表达式，并提出了一些可供实用设计参考的建议。
[关键词]  风吸力  檩条  承载力  设计建议

The behavior of common thin-walled channel purlin C160×70×20×3(6m span) subjected to wind uplift load is studied. The factors such as support conditions, location and stiffness of the pulling rod, the lateral restraints offered by roof panels etc., are taken into consideration. Based on the analyzing results by means of ANSYS5 .7, the inner-force of the pulling rod, ultimate load-carrying capacity and the linear interaction equation between axial compression and lateral load of the purlin are obtained. And some practical design suggestions are also proposed.
Keywords: wind  uplift load; channel  purlin; load-carrying capacity; design suggestions