884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(1 土木工程安全與耐久教育部重點(diǎn)實(shí)驗(yàn)室，清華大學(xué)土木工程系， 北京 100084；2 北京市鋼與混凝土組合結(jié)構(gòu)工程技術(shù)研究中心，清華大學(xué)土木工程系， 北京 100084)

［摘要］高強(qiáng)鋼結(jié)構(gòu)對(duì)連接承載力的要求提高，為在高強(qiáng)鋼結(jié)構(gòu)中應(yīng)用高強(qiáng)度螺栓摩擦型連接，需改進(jìn)接觸面處理方式以提高抗滑移系數(shù)。電弧熱噴鋁是一種新的接觸面處理方式，其抗滑移系數(shù)較高，但目前電弧熱噴鋁接觸面相關(guān)研究較少，應(yīng)用于高強(qiáng)鋼結(jié)構(gòu)時(shí)缺少設(shè)計(jì)依據(jù)。針對(duì)Q460C，Q460D，Q890C三種牌號(hào)的高強(qiáng)鋼，以及電弧熱噴鋁、軋制表面砂輪除銹和軋制表面鋼絲刷除銹三種接觸面處理方式，進(jìn)行了7組高強(qiáng)度鋼材螺栓摩擦型連接試件的抗剪試驗(yàn)，分析了鋼材強(qiáng)度、板件厚度、螺栓預(yù)拉力及接觸面處理方式對(duì)抗滑移系數(shù)的影響。試驗(yàn)結(jié)果表明：荷載引起的10.9級(jí)高強(qiáng)度螺栓預(yù)拉力損失可達(dá)10%以上，經(jīng)電弧熱噴鋁處理過的高強(qiáng)度鋼材接觸面抗滑移系數(shù)可達(dá)0.71，設(shè)計(jì)中建議按最小值取0.60。 

［關(guān)鍵詞］高強(qiáng)度鋼材；高強(qiáng)度螺栓；摩擦型連接；電弧熱噴鋁；抗滑移系數(shù) 

中圖分類號(hào)：TU391 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)13-0087-06

Experiment study on slip coefficient of high strength steel bolt connection arc thermal spraying aluminum contact surface  

CHEN  Xuesen1,2,  SHI  Gang1,2,  CHEN  Yufeng1 

(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084， China； 2 Beijing Engineering Research Centre of Steel and Concrete Composite Structures, Department of Civil Engineering, Tsinghua University, Beijing 100084， China) 

Abstract: The resistance of the connections is required to be increased in high strength steel structures. In order to apply slip-critical design of high strength bolted friction-type connection in high strength steel structures, the contact surface treatments should be improved to increase the slip coefficient. Arc thermal spraying aluminum is a new method of contact surface treatment that may develop higher slip coefficients, but there are little investigations on the arc thermal spraying aluminum contact surface and a lack of design basis in high strength structures. A total of 7 groups of high strength steel bolted connection friction-type connection specimens, with three steel grades of Q460C, Q460D and Q890C, considering three contact surface treatments of arc thermal spraying aluminum, rust removal with grinder, and rust removal with wire brush were tested. The influences of steel strength, plate thickness, bolt pretension and contact surface treatment on slip coefficients were analyzed. According to the results, the pretension loss of 10.9 grade high strength bolts caused by force could be more than 10%, and the slip coefficient with arc thermal spraying aluminum contact surface, which could reach 0.71, is recommended to be 0.60 in design. 

Keywords:high strength steel； high strength bolt； friction-type connection； arc thermal spraying aluminum； slip coefficient

*國家重點(diǎn)研發(fā)計(jì)劃資助（項(xiàng)目編號(hào)2018YFC0705500，課題編號(hào)2018YFC0705501）。

 作者簡(jiǎn)介：陳學(xué)森，博士，Email: cxs09@foxmail.com；通信作者：施剛，博士，教授，博士生導(dǎo)師，Email: shigang@tsinghua.edu.cn。