|Table of Contents|

Finite Element Analysis of Aluminum Alloy Core Assembled Bucking-restrained Braces(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年02期
Page:
56-63
Research Field:
Publishing date:

Info

Title:
Finite Element Analysis of Aluminum Alloy Core Assembled Bucking-restrained Braces
Author(s):
LI Guo-chang;  ZHANG Hong-en;  YANG Zhi-jian;  SHI Xian-shuo
(School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, Liaoning, China)
Keywords:
finite element analysis;  aluminum alloy core assembled buckling-restrained brace;  yield length ratio;  width-thickness ratio;  bolt spacing;  gap
PACS:
TU352.1
DOI:
-
Abstract:
An aluminum alloy inner core assembled buckling-restrained braces(ALB)was proposed, and four groups and nineteen kinds of ALB by using A5083 aluminum alloy as the inner core of energy dissipation were designed, and the finite element analysis was carried out by ABAQUS software. The influences of yield length ratio YLR, width-thickness ratio, bolt spacing, gap between core plate and restraint plate on ALB performance were studied. The results show that when YLR<0.75, the energy dissipation performance of the buckling-restrained brace(BRB)increases with the increase of YLR, when YLR>0.75, the energy dissipation performance of the BRB begins to decrease as the YLR increases, when YLR=0.75, the overall performance of the BRB is the best. The energy dissipation performance of the BRB decreases with the increase of the width-thickness ratio, when the width-thickness ratio is no more than 10, the BRB can get better energy dissipation capability. The bolt spacing should not be too large. The bolt spacing is controlled by controlling the ratio of the bolt spacing Lb to the buckling wavelength Lw of the BRB core plate. When the Lb/Lw is not more than 1.5, the force of the constraint unit is more reasonable and can provide sufficient binding force for the core unit. The gap between the core plate and the constraint unit is too small to leave enough space for the deformation of the core plate. When the gap is too large, the bearing capacity will be greatly reduced and unstable. When the gap is controlled in 0.5-2 mm, the supporting capacity performance is better.

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Last Update: 2019-03-27