高强钢材钢管混凝土柱轴压承载力计算方法  

Ultimate Loading Capacity and Design Methods of Axially Loaded Concrete-Filled High-Strength Steel Tubular Columns

作　　者：涂程亮 石永久[1,2] 刘栋 TU Chengliang;SHI Yongjiu;LIU Dong(Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry,Tsinghua University,Beijing 100084,China;National Engineering Laboratory for Green and Safe Construction Technology in Urban Rail Transit,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学土木工程安全与耐久教育部重点实验室,北京100084 [2]清华大学城市轨道交通绿色与安全建造技术国家工程实验室,北京100084

出　　处：《建筑钢结构进展》2020年第5期99-107,共9页Progress in Steel Building Structures

基　　金：国家重点研发计划(2017YFC0703401)。

摘　　要：为研究高强钢材钢管混凝土轴压构件的承载力计算方法,采用ABAQUS数值模型,对182个高强钢材钢管混凝土轴压试件进行逐一计算模拟,验证了数值模型的有效性。在补充112个构件算例的基础上,与已有试验数据一同组成样本,基于《钢管混凝土结构技术规范》(GB 50936—2014)中的设计方法,提出了适用于钢材屈服强度fy≥450MPa的钢管混凝土轴压短柱承载力与长柱稳定性的计算公式,并给出了计算公式适用的套箍指标θ和径厚比(宽厚比)D/t(B/t)限值,同时基于参数分析给出了钢材强度与混凝土强度等级匹配的设计建议。In order to obtain the ultimate loading capacity and design method of axially loaded concrete-filled high-strength steel tubular,numerical models are built in ABAQUS.Simulation on 182 available specimens was carried out to validate the numerical model.Additional 112 examples were analyzed.Based on the test and simulation results,the formulas for short-column capacity and long-column stability was proposed,by following the design method in Technical Code for Concrete Filled Steel Tubular Structures(GB 50936—2014),to allow the application of steel tubes with yield strength fy≥450 MPa.The limits of constraint indexθand the diameter to thickness ratio D/t(B/t)for the design formula were also suggested.Meanwhile,the design recommendations for matching steel and concrete strength are given based on parametric analysis.

关 键 词：高强钢 钢管混凝土柱 数值模型 设计方法 

分 类 号：TU398[建筑科学—结构工程]