- 摘 要
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（1 蘭州大學(xué)西部災(zāi)害與環(huán)境力學(xué)教育部重點(diǎn)實驗室， 蘭州 730000；2 蘭州大學(xué)土木工程與力學(xué)學(xué)院， 蘭州 730000；3 蘭州大學(xué)住房管理處， 蘭州 730000）
［摘要］分析了純扭、扭矩與豎向剪力、扭矩與水平剪力作用下螺栓群的最不利螺栓位置，指出了扭剪作用下螺栓群的8種工況，并分別分析了8種工況下螺栓群的最不利螺栓位置；基于螺栓的豎向剪力與水平剪力繞螺栓群形心的方向與扭矩方向一致，提出了扭剪作用下螺栓群最不利螺栓位置的速判法。采用速判法判定了梁腹板拼接連接兩側(cè)螺栓群的最不利螺栓的位置，指出了該類連接最不利螺栓位置的特點(diǎn)。通過數(shù)值算例驗證了速判法的正確性。研究表明，扭剪作用下螺栓群最不利螺栓位置的速判法簡單且易于操作，最多可節(jié)約判定時間75％。
［關(guān)鍵詞］偏心受剪螺栓群； 并列布置； 扭剪作用； 最不利螺栓位置； 速判法
中圖分類號：TU391文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)03-0109-05
Rapid determination method for the most unfavorable bolt positions in a bolt group subjected to torsion and shear actions
Liu Zhanke1,2, Liu Dongfa2, Qi Wei3
（1 Key Laboratory of Mechanics on Disaster and Environment in Western China, the Ministry of Education of China, Lanzhou University, Lanzhou 730000, China; 2 College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China; 3 Housing Management Office, Lanzhou University, Lanzhou 730000, China）
Abstract:The most unfavorable bolt positions of the bolt group under the action of pure torsion, torque and vertical shear force, torque and horizontal shear force were analyzed, and eight kinds of working conditions of the bolt group under the action of torsion and shear were pointed out, and the most unfavorable bolt positions in the bolt group under the eight kinds of working conditions were analyzed respectively. Considering that the direction of the vertical shear force and horizontal shear force around the centroid of the bolt group is the same as the torque direction, a rapid determination method for the most unfavorable bolt positions in the bolt group under the action of torsion and shear was proposed. The position of the most unfavorable bolts of the bolts in the bolt group on both sides of the beam web splicing connection was determined by the rapid determination method, and the characteristics of the most unfavorable bolt positions of this type of connection were pointed out. Numerical examples verified the correctness of the rapid judgment method. The research shows that the rapid determination method of the most unfavorable bolt positions in the bolt group under the action of torsion and shear is simple and easy to operate, which can save the determination time by up to 75%.
Keywords:eccentric shear bolt group; parallel arrangement; torsional shear action; the most unfavorable bolt position; rapid determination method
*甘肅省科技計劃項目（1107RJYA078），蘭州大學(xué)示范課程“鋼結(jié)構(gòu)設(shè)計原理”（2019），2019年甘肅省高等學(xué)校教育教學(xué)質(zhì)量與教學(xué)改革項目。
作者簡介：劉占科，博士，副教授，Email: liuzhk@lzu.edu.cn。
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