高强钢筋搭接焊缝的性能试验

Experimental Study on Joint Behavior of High-Strength Steel Bar Lap Weld

提出焊接高强闭合箍筋形式,开展8组高强钢筋搭接焊缝性能的拉拔试验,研究焊缝长度、焊缝形式和焊缝厚度对焊接试件屈服强度和极限强度的影响.试验结果表明:焊接试件的屈服强度略低于单根钢筋试件,极限强度较为接近;在试验参数取值范围内,随着焊缝长度的增加,双面搭接焊试件的屈服强度和极限强度略有增加;单面焊与双面焊对试件性能的影响不明显;加厚焊缝可以提高焊缝的可靠度.

The types of welded high-strength closed stirrup were proposed.8 groups of pullout test were carried out to study the effect of weld length,number of weld side and weld thickness on yield strength and ultimate strength of specimens.Test results indicate that the yield strength of weld specimen is slightly lower than that of control specimen,while the ultimate strengths of all specimens are close to each other.Within the parameter range,the yield strength and ultimate strength of specimen with double-side weld increase as weld length increases.Whether single-side weld or double-side weld doesn′t influence obviously the specimen behavior.Increment of the weld thickness can enhance the reliability of weld joint.