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(江蘇徐州市建設(shè)局 221000)
【提要】 針對(duì)鋼框架梁柱栓焊混合剛性節(jié)點(diǎn)易出現(xiàn)的焊縫脆性破壞形式及其機(jī)理，對(duì)節(jié)點(diǎn)構(gòu)造設(shè)計(jì)提出了改進(jìn)意見，即在節(jié)點(diǎn)位置加焊楔形蓋板。通過足尺低周往復(fù)荷載試驗(yàn)，得到了較為飽滿的滯回曲線，驗(yàn)證了蓋板型剛性節(jié)點(diǎn)具有良好的延性性能并能夠在設(shè)計(jì)位置出現(xiàn)塑性鉸。對(duì)蓋板型與常用型節(jié)點(diǎn)進(jìn)行了比較，量化了蓋板型節(jié)點(diǎn)承載能力及延性性能的優(yōu)勢(shì)。提出了防止節(jié)點(diǎn)脆性破壞的構(gòu)造改進(jìn)措施。
【關(guān)鍵詞】剛性節(jié)點(diǎn) 焊縫 塑性鉸 楔形蓋板
Experimental Evaluation of Ductility Behavior of Steel Frame Rigid Joint Welded with Cover Plates/Guo Zhen1, Yuan Yingshu1, Bi Yurui1, Xia Daming2(1 College of Civil Engineering, China University of Mining and Technology, Xuzhou 221008, China；2 Xuzhou Construction Bureau, Xuzhou 221000,China)
Abstract:According to the brittle failure form and mechanics of steel frame rigid joint, the design suggestion of the joint is proposed for improving the ductity of the joints. The results of the cyclic loads test show that the weldedcoverplates steel frame rigid joint has good ductile performance and plastic hinge could appear in the expectant place. The performance of coverplates joint and common joint are compared. The structural improvement to inv
ent the brittle failure is proposed.
Keywords:rigid joint; weld; plastic hinge; weldedcoverplates