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

卷:

35卷

期数:

2018年04期

页码:

45-53

栏目:

出版日期:

2018-07-30

文章信息/Info

Title:

Effect of Butt Weld Construction on Fracture Properties of High Strength Steel Beam-column Joints

作者:

王 燕，杨 帆

青岛理工大学土木工程学院

Author(s):

WANG Yan, YANG Fan

School of Civil Engineering, Qingdao University of Technology

关键词:

Q460高强钢; 对接焊缝; 梁柱节点; 断裂性能; 试验研究; 衬板

Keywords:

Q460 high-strength steel;  butt weld;  beam-column joint;  fracture property;  experimental research;  lining plate

分类号:

-

DOI:

-

文献标志码:

A

摘要:

为研究对接焊缝构造形式对Q460高强钢梁柱节点断裂性能的影响，设计了4种不同构造形式的对接焊缝节点试件进行加载试验，采用拉卸循环加载方式，研究其承载能力、变形能力、破坏形态等性能，对比分析不同焊缝构造形式节点试件的断裂性能，对衬板双边焊缝构造形式节点试件进行了深入研究，分析了衬板双边焊缝间距对节点断裂性能的影响。结果表明：梁柱翼缘对接焊缝不同构造形式对试件断裂性能有一定影响，衬板采用双边焊缝构造形式可加强焊缝区域的强度，避免焊缝及热影响区发生断裂破坏，使试件破坏区域外移至母材区，试件的抗断裂能力较强；衬板采用双边焊缝的构造形式对试件的承载能力影响较小，对试件的变形能力影响较大，承载力及变形较衬板采用单边焊缝分别提高了3.3%，31.9%；增大衬板双边焊缝间距有利于加强焊缝区域强度，建议在构造允许的前提下，适当增大衬板宽度，降低焊缝发生开裂破坏的可能性。

Abstract:

In order to study the effect of butt weld construction on the fracture properties of Q460 high-strength steel beam-column joints, 4 different construction forms of butt weld joint specimens were designed for loading test. The bearing capacity, deformation capacity, failure mode and other properties were studied by cyclic loading. The fracture properties of joints with different weld constructions were compared and analyzed. The joint specimens of the lining plate double-side weld construction were deeply studied. The influences of the distance of lining plate double-side welds on the fracture properties of joints were analyzed. The results show that the flange butt weld construction forms have certain influence on the fracture properties of specimens. The lining plate double-side weld construction form can enhance the strength of weld area, and the fracture failure of weld and heat affected zone can be avoided. The fracture area of specimen is moved to the base metal area, and the fracture resistance of specimen is strong. The lining plate with double-side weld construction form has little effect on the bearing capacity of specimen, and has great influence on the deformation ability of specimen. Compared with the lining plate with unilateral weld, the bearing capacity and deformation are increased by 3.3%, 31.9% respectively. Increasing the distance of lining plate double side welds is helpful to strengthen the strength of weld area. It is suggested that under the premise of construction permit, the width of lining plate should be increased appropriately, and the possibility of cracking and failure of welds will be reduced.

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更新日期/Last Update: 2018-07-18