铝合金圆管柱基于连续强度法的轴心受压承载力性能研究  

Research on Axial Compression Loading Capacity of Aluminum Alloy Tubular Column Based on Continuous Strength Method

作　　者：陈向荣[1] 李红平 李刚[2] 卢小松 连鸣[1] CHEN Xiangrong;LI Hongping;LI Gang;LU Xiaosong;LIAN Ming(School of Civil Engineering,Xi′an University of Architecture and Technology,Xi′an,China,710055;Architectural Design and Research Institute,Xi′an University of Architecture and Technology,Xi′an,China,710055;School of Civil Engineering,Xi′an Technological University,Xi′an,China,710021)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学设计研究总院,陕西西安710055 [3]西安工业大学建筑工程学院,陕西西安710021

出　　处：《沈阳建筑大学学报（自然科学版）》2022年第2期211-217,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金青年基金项目(51708444)。

摘　　要：目的基于连续强度法(CSM)提出适用于圆管铝合金柱的强度设计公式,解决传统有效截面法在构件承载力设计中结果不连续且偏保守问题。方法收集大量国产铝合金材料的材性试验数据对CSM进行修正,提出适用于国产铝合金圆管柱的CSM强度设计公式;对55个不同径厚比的铝合金轴心受压圆管柱进行有限元参数分析,研究径厚比对承载力性能的影响;通过72个铝合金圆管短柱有限元计算结果与各国规范、建议CSM承载力设计公式进行对比分析,验证了建议CSM承载力设计公式的有效性和可靠性。结果铝合金圆管截面的径厚比限值为58;N_(FE)/N_(CSM)、N_(FE)/N_(GB)、N_(FE)/N_(AA)和N_(FE)/N_(EC9)的均值分别为1.114、1.252、1.195和1.199,CSM的设计值相较于欧规、美规和中国规范的设计值精度更高。结论修正的CSM承载力设计公式表现出较好的精度,且总体偏于安全,可为工程设计提供参考。Based on the continuous strength method(CSM),the strength design formula suitable for the round tube aluminum alloy column was proposed to solve the problem that the results of the traditional effective area method in the member loading capacity design were discontinuous and conservative.The CSM strength design formula suitable for the domestic aluminum alloy round pipe string was proposed by revising the CSM based on the material property test data collected from a large number of domestic aluminum alloy materials.The influence of diameter-thickness ratio on loading capacity of 55 aluminum alloy axial compression round pipe strings with different diameter-thickness ratios was studied by finite element analysis.The validity and reliability of the proposed CSM loading capacity design formula were verified by comparing the finite element calculation results of 72 aluminum alloy round tube short columns with the national codes and recommended CSM loading capacity design formulas.The results show that the limiting value of diameter-thickness ratio of aluminum alloy round tube section is 58.The mean values of N_(FE)/N_(CSM),N_(FE)/N_(GB),N_(FE)/N_(AA)and N_(FE)/N_(EC9)are 1.114,1.252,1.195 and 1.199,respectively.The design values of CSM are more accurate than those of European code,American code and Chinese code.The modified CSM loading capacity design formula shows good accuracy and is generally safe,which can be used as a reference for engineering design.

关 键 词：国产铝合金 轴心受压 连续强度法 承载力 有限元分析 

分 类 号：TU395[建筑科学—结构工程]