基于容许应力法的钢柱刚接柱脚底板设计研究  

作　　者：杨大勇 吴金池 

机构地区：[1]湖北工建集团第三建筑工程有限公司,武汉430000

出　　处：《科技创新与应用》2025年第1期193-196,共4页Technology Innovation and Application

基　　金：2023年度湖北省建设科技计划项目(2023197)。

摘　　要：外露式钢柱刚接柱脚将钢柱下端的内力通过柱脚底板传递给基础,是钢结构的重要节点,在大跨度钢结构厂房的应用极为广泛。现有技术关于柱脚底板的计算是基于承载能力极限状态法,同时在计算柱脚底板受压区长度时需借助一元三次方程求解或借助查图确定,计算过程较繁琐,导致设计人员的设计效率较低。为了解决现有技术的不足,提出一种外露式钢柱刚接柱脚的柱脚底板计算方法,其考虑柱脚底板小偏心和大偏心2种状态,且基于容许应力法,同时根据塑性屈服强度理论,假定基础反力均匀分布,采用塑性截面模量,计算柱脚底板在轴力标准值和弯矩标准值共同作用下的计算厚度。新技术既可以大大简化计算工作量,提高设计效率,又可以优化柱脚底板的计算厚度,降低工程成本。新技术具有较好的推广价值,可供类似工程参考。The exposed fixed-joint steel column foot transfers the internal force at the lower end of the steel column to the foundation through the base plate,which is an important joint of steel structure,and is widely used in long-span steel structure plant.The calculation of base plate in the prior technology is based on the limit state method of bearing capacity,and the length of the compression zone of base plate needs to be solved by one cubic equation or determined by finding chart.The calculation process is complicated,resulting in low design efficiency.In order to solve the shortcomings of the prior art,a method for calculating the column sole plate of an exposed steel column rigidly connected to the column base is proposed.It considers two states of small eccentricity and large eccentricity of the column sole plate,and is based on the allowable stress method and at the same time according to the plastic yield strength theory,assuming that the foundation reaction force is evenly distributed,and adopts the plastic section modulus to calculate the calculated thickness of the column sole plate under the combined action of the standard value of axial force and the standard value of bending moment.The new technology can not only greatly simplify the calculation workload and improve design efficiency,but also optimize the calculated thickness of the column sole plate and reduce engineering costs.The new technology has good promotion value and can be used as a reference for similar projects.

关 键 词：钢柱刚接柱脚 柱脚底板 极限状态法 容许应力法 小偏心状态 大偏心状态 

分 类 号：TU318[建筑科学—结构工程]