关少钰, 白涌滔, 刘卫辉, 李银胜, 王伟. 基于统一强度理论的高强钢管混凝土柱压弯屈服准则[J]. 工程力学, 2019, 36(S1): 170-174,183. DOI: 10.6052/j.issn.1000-4750.2018.05.S035
引用本文: 关少钰, 白涌滔, 刘卫辉, 李银胜, 王伟. 基于统一强度理论的高强钢管混凝土柱压弯屈服准则[J]. 工程力学, 2019, 36(S1): 170-174,183. DOI: 10.6052/j.issn.1000-4750.2018.05.S035
GUAN Shao-yu, BAI Yong-tao, LIU Wei-hui, LI Yin-sheng, WANG Wei. UNIFIED STRENGTH THEORY FOR CONCRETE FILLED STEEL TUBE COLUMNS[J]. Engineering Mechanics, 2019, 36(S1): 170-174,183. DOI: 10.6052/j.issn.1000-4750.2018.05.S035
Citation: GUAN Shao-yu, BAI Yong-tao, LIU Wei-hui, LI Yin-sheng, WANG Wei. UNIFIED STRENGTH THEORY FOR CONCRETE FILLED STEEL TUBE COLUMNS[J]. Engineering Mechanics, 2019, 36(S1): 170-174,183. DOI: 10.6052/j.issn.1000-4750.2018.05.S035

基于统一强度理论的高强钢管混凝土柱压弯屈服准则

UNIFIED STRENGTH THEORY FOR CONCRETE FILLED STEEL TUBE COLUMNS

  • 摘要: 该文基于统一强度理论建立高强钢管混凝土柱的屈服准则。考虑到柱的水平侧移在截面上引起的附加弯矩作用,假设截面应力在屈服前呈线性分布。引入临界斜率k'的定义,以此斜率作为全截面受压的临界值。由平衡条件得到钢管混凝土柱内不同点处的应力状态,代入统一强度理论(UST)得到高强钢管混凝土柱的屈服函数,并采用相关联流动法则建立塑性势函数,以钢管混凝土柱内某点开始进入塑性作为其承载力极限,由此推导出相应的承载力设计值,并将求得的结果与相关规范进行对比验证。结果表明该文提出的UST钢管混凝土柱屈服准则与相关规范求解一致,且对于压弯构件以及轴压构件等都具有很好的适用性。

     

    Abstract: This paper focuses on the yielding criterion of a high-strength concrete filled steel tube column under axial compression with flexure. The steel tube and infill concrete are all governed by unified strength theory, and their different material properties are reflected by parameters b and α. Considering the additional bending moment caused by horizontal displacement, a new constitutive equation is proposed associated with the flow rule based on the generalized unified failure criterion by which the vertical stress distributes linearly from the tension side to the compression side of a section. The yielding strength can be calculated from a plastic potential function while the column bottom remains in a plastic state. In addition, this new method is verified by the comparisons with the specification results of high-strength concrete filled steel tube columns under reciprocating tension and compression loading.

     

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