脱空对圆钢管混凝土受剪性能的影响分析

Translated title of the contribution: Effects of gaps on the behaviour of circular CFST members under shear

Yong Ye, Lin-hai Han, Zhong Tao

Research output: Contribution to journalArticlepeer-review

Abstract

A finite element model (FEM) is established with proper constitutive laws of materials, element types, meshing technology, and boundary conditions. After being verified with experimental results, the FEM is used to study the shear strength of circular concrete-filled steel tubular (CFST) members with a circumferential gap between the tube and concrete. The numerical investigation indicates that the existence of the gap decreases the ultimate shear strength of CFST members, and the influence is closely related to the gap ratio and the span-to-depth ratio. However, the influence of the concrete strength, steel strength and steel ratio on the shear strength reduction is less significant. When the span-to-depth ratio equals to 0.5, the gap has the most significant influence on the mechanical performance of CFST members with initial concrete imperfection. Based on the parametric study, a simplified formula is proposed to calculate the shear strength of circular CFST members with a circumferential gap.
Translated title of the contributionEffects of gaps on the behaviour of circular CFST members under shear
Original languageChinese (Simplified)
Pages (from-to)62-66 and 71
Number of pages6
JournalEngineering Mechanics
Volume33
DOIs
Publication statusPublished - 2016

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