Experiment on Welding Residual Stress of Integral Joint for Steel Truss Bridge

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China Journal of Highway and Transport ›› 2011, Vol. 24 ›› Issue (1) : 83-88.

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Experiment on Welding Residual Stress of Integral Joint for Steel Truss Bridge

HUANG Yong-hui¹, WANG Rong-hui^1,2, GAN Quan¹

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Abstract

In order to study welding residual stress strength and distribution rule of the integral joint for Dongjiang Bridge, 1∶1 full-scale model of joint E16 was fabricated with the same welding process as the real bridge. Using blind-hole method, the residual stress strength and distribution of this full-scale model were measured. Results show that there is high residual stress during the welding process of integral joint and the maximum tensile residual stress may reach the yield strength of the steel. Tensile longitudinal residual stress appears in the regions near the welding bead and alternates into compressive stress from a certain distance. The maximum tensile residual stress is found in the centre of the welding bead. In weld region between two plates with different thicknesses, the value of welding residual stress of the thin plate is lower than that of the thick plate. Sanding and drilling bolt hole can decrease residual stress of steel plate caused by welding. Research conclusions can provide references for measure of reducing the welding residual stress of integral joint.

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bridge engineering / integral joint / blind-hole method / welding residual stress / full-scale model

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HUANG Yong-hui, WANG Rong-hui, GAN Quan. Experiment on Welding Residual Stress of Integral Joint for Steel Truss Bridge[J]. China Journal of Highway and Transport, 2011, 24(1): 83-88

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2010-02-26	2011-01-01
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2014-01-07

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