摘要
针对内隔板式方钢管混凝土柱-钢梁节点的节点局部屈服抗弯承载力计算的方法,探讨并分析了CECS159∶2004《矩形钢管混凝土结构技术规程》设计规定与日本Koji Morita提出的两种基于屈服线理论计算方法的特点,并将轴压作用分别引入到3种计算方法中,得到相应考虑轴压作用的改进后计算方法。为比较上述各计算方法梁柱翼缘宽度比适用范围,对梁柱翼缘宽度比进行参数分析,并利用已有试验数据进行对比。为说明轴压作用对计算精度与安全性的影响,对改进前后计算方法的计算结果与已有试验数据进行对比。对比分析结果表明:改进的采用联合屈服机制的计算方法适用于任意梁柱翼缘宽度比情况,具有计算精度高、计算偏于安全的优点,且计算方便,宜于设计应用。
The calculation of local yield flexural capacity of concrete-filled square steel tubular column to steel beam joint with internal diaphragms was discussed. Firstly the characteristics of the calculation method from the Technical Specification for Structures with Concrete-filled Rectangular Steel Tube Members（CECS 159 ∶ 2004） and two calculation methods based on yield-line method proposed by Koji Mortia in Japan were investigated. Then the effect of axial pressure on column was introduced in the three methods to get corresponding improved methods. In order to compare the applicable scope of beam-column flange width ration,parameter analysis for the width ratio was carried out,and the existing data was used for comparision. In order to explain the the effect of axial pressure on calculation accuracy and safety,the calculation results before and after the improvement were compared with the existing experimental data. Through comparison and analysis,the improved method based on combined yield mechanism is suitable for all range of beam-column flange width ratio. The yield flexural capacity can be accurately predicted by this method and the calculation is partial to the safety. Also this method is convenient for calculation. So it is suitable for application of design.
作者
郭征明
陈亚飞
曹阳
付功义
GUO Zhengming;CHEN Yafei;CAO Yang;FU Gongyi(Space Structures Research Center, Shanghai Jiaotong University, Shanghai 200030, Chin)
出处
《钢结构》
2018年第4期39-45,57,共8页
Steel Construction
关键词
方钢管混凝土柱
梁柱节点
节点局部屈服抗弯承载力
屈服线理论
轴压作用
宽度比
concrete-filled square tubular column
beam-column joint
local yield flexural capacity
yield-line method
axial pressure
width ratio
