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(東南大學(xué)混凝土及預(yù)應(yīng)力混凝土結(jié)構(gòu)教育部重點(diǎn)實(shí)驗(yàn)室， 南京 211189)

［摘要］為了解高強(qiáng)度螺栓連接鋼-混凝土組合件受剪時(shí)的破壞類型、承載力以及影響參數(shù)，設(shè)計(jì)了16個(gè)試件進(jìn)行單調(diào)加載試驗(yàn)，研究了芯板內(nèi)混凝土、螺栓直徑、螺栓預(yù)拉力、混凝土孔徑、混凝土強(qiáng)度、混凝土厚度、芯板厚度、蓋板厚度等參數(shù)對(duì)鋼-混凝土組合件受剪承載力、連接部件之間的滑移及變形的影響。試驗(yàn)結(jié)果表明：試件主要發(fā)生孔壁承壓破壞、螺栓剪斷和蓋板凈截面拉裂3種破壞模式；芯板內(nèi)填充的混凝土使高強(qiáng)度螺栓發(fā)生彎曲，可以提高試件的峰值承載力和變形能力；螺栓直徑、混凝土強(qiáng)度、混凝土厚度、芯板厚度和蓋板厚度的增加可以提高試件的峰值承載力，螺栓預(yù)拉力的增加可以提高滑移荷載。

［關(guān)鍵詞］高強(qiáng)度螺栓； 鋼-混凝土組合件； 破壞類型； 承載力； 影響參數(shù)

中圖分類號(hào)：TU398-2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)02-0107-05

Experimental study on failure types and bearing capacity of steel-concrete composite members with high-strength bolts

Kong Jie， Qiu Hongxing， Yang Yuan， Sun Jian

(Key laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 211189, China)

Abstract:In order to understand the failure type, bearing capacity and influencing parameters of steel-concrete composite members with high-strength bolts under shear forces, 16 specimens were designed for monotonic loading test. The influences of concrete in core plate, bolt diameter, bolt pre-tension force, concrete aperture, concrete strength, concrete thickness, core plate thickness and cover plate thickness on shear capacity, slip and deformation of steel-concrete composite members were studied. The test results show that the three main failure types of the specimens are hole wall compression failure, bolt shearing failure and cover plate net section tension cracking; the concrete filled in the core plate bends the high-strength bolts, which can improve the peak bearing capacity and deformation capacity of the specimens; The increases of bolt diameter, concrete strength, concrete thickness, core plate thickness and cover plate thickness can increase the peak bearing capacity of specimens, and the increase of bolt pre-tension force can increase the slip load.

Keywords:high-strength bolt; steel-concrete composite member; failure type; bearing capacity; influence parameter

*國(guó)家自然科學(xué)基金項(xiàng)目(51708107)，江蘇省自然科學(xué)基金項(xiàng)目(BK20170668)，城市與建筑遺產(chǎn)保護(hù)教育部重點(diǎn)實(shí)驗(yàn)室開(kāi)放研究課題(KLUAHC1805)。

作者簡(jiǎn)介：孔杰，碩士，Email：710261409@qq.com。