A numerical study of prestressed high strength steel tubular members  

作　　者：Michaela GKANTOU Marios THEOFANOUS Charalampos BANIOTOPOULOS 

机构地区：[1]Department of Civil Engineering,Liverpool John Moores University,Liverpool L33AF,UK [2]Department of Civil Engineering,University of Birmingham,Birmingham B152TT,UK

出　　处：《Frontiers of Structural and Civil Engineering》2020年第1期10-22,共13页结构与土木工程前沿（英文版）

摘　　要：The structural behavior of prestressed high strength steel(HSS)tubular members is investigated through the execution of advanced finite element modeling.Numerical models are developed and validated against published experimental data on HSS tubular members subjected to different levels of initial prestress and loaded either in tension or compression.The effect of the presence or absence of grouting on the strength and ductility of the members is also considered.To numerically replicate the structural response recorded in the tests,some key modeling features including the employed numerical solver,the adopted material models and the element types warrant careful consideration.Upon developing of the finite element models,the numerically generated ultimate loads,the corresponding failure modes and the full load-deformation curves are compared to the experimental ones,indicating a successful validation.As anticipated,prestressing enhances the load-bearing capacity for the tensile members,whereas it is detrimental for the compressive ones.A series of parametric studies is performed to assess the influence of key factors on the structural response of prestressed HSS members and the obtained results are discussed.Design guidance for tensile and compressive prestressed tubular members is also provided.

关 键 词：finite element PRESTRESSING TUBULAR MEMBERS GROUT high strength steel 

分 类 号：TU392.3[建筑科学—结构工程]