内置开孔钢板加劲肋的L形宽肢钢管混凝土组合柱轴压性能研究  

Axial Compressive Behavior of Wide-leg L-shaped Columns Composed of Concrete-filled Steel Tubes with PBL

作　　者：张旺 张晓虎[1] 桂海伟 熊清清 苏天成 ZHANG Wang;ZHANG Xiao-hu;GUI Hai-wei;XIONG Qing-qing;SU Tian-cheng(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Department of Civil Engineering,Tianjin University,Tianjin 300072,China;Dali Construction Group Corporation Limited,Hangzhou 311215,China)

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]天津大学建筑工程学院,天津300072 [3]大立建设集团有限公司,杭州311215

出　　处：《科学技术与工程》2023年第12期5192-5200,共9页Science Technology and Engineering

基　　金：河北省省级科技计划(22375409D);河北省高等学校科学技术研究项目(ZD2022040)。

摘　　要：为研究内置开孔钢板(PBL)加劲肋的宽肢钢管混凝土组合柱(W-LCFST)的轴压性能,以L形双板连接钢管混凝土组合柱(LCFST-D)的轴压试验为基础,开展了W-LCFST柱参数化分析。结果表明:添加PBL加劲肋可增强混凝土和钢板之间的相互作用,与未添加PBL加劲肋的试件相比,添加1组PBL加劲肋,承载力提高了3.8%~5%,延性系数提高了14.3%~25.7%;添加2组PBL加劲肋,承载力提高了7.9%,延性系数提高了29.2%。最后,基于Mander理论,提出了预测W-LCFST柱截面承载力的计算公式,并将预测公式计算结果、日本规范Recommendations for design and construction of concrete filled steel tubular structures(AIJ-CFT(1997))、美国规范Load and resistance factor design specification for structural steel buildings(AISC-LRFD(1999))、《矩形钢管混凝土结构技术规程》(CECS159:2004)分别与有限元结果进行了对比。结果表明:上述公式计算结果均较为保守,但所提出的预测公式计算结果更加准确,平均误差为7%。In order to study the axial compression performance of wide-leg concrete-filled steel tubular composite columns(W-LCFST)with perforated steel plate(PBL)stiffeners,the parametric analysis of W-LCFST columns was carried out based on the axial compression test of L-shaped double-plate connection concrete-filled steel tubular composite columns(LCFST-D).The results show that adding PBL stiffener can enhance the interaction between concrete and steel plate.Compared with the specimens without PBL stiffeners,the bearing capacity and ductility coefficient of the specimens with PBL stiffeners increases by 3.8%~5%and 14.3%~25.7%,respectively.Adding two groups of PBL stiffeners,the bearing capacity and ductility coefficient increases by 7.9%and 29.2%,respectively.Finally,based on Mander theory,a calculation formula for predicting the bearing capacity of W-LCFST column section was proposed,and the predicted calculation results of the formula were compared with those of the Japanese code Recommendations for Design and Construction of Concrete Filled Steel Tubular Structures(AIJ-CFT(1997)),American code Load and Resistance Factor Design Specification for Structural Steel Buildings(AISC-LRFD(1999)),Technical Specification for Concrete Filled Rectangular Steel Tubular Structures(CECS 159:2004)and finite element analysis results.The results show that the calculation results of the above specifications and the prediction formulas are all conservative,but the proposed prediction formulas are more accurate,the average error is 7%,and the section bearing capacity of W-LCFST columns can be calculated.

关 键 词：L形宽肢钢管混凝土组合柱(W-LCFST) 开孔钢板(PBL)加劲肋 有限元分析 截面承载力 

分 类 号：TU396[建筑科学—结构工程]