- 摘 要
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（1 南昌大學建筑工程學院， 南昌 330031； 2 江西省近零能耗建筑工程實驗室， 南昌 330031；3 江西中煤建設集團有限公司， 南昌 330001）
［摘要］基于已有試驗結(jié)果，詳細分析影響不同長度比剪切型消能梁段超強系數(shù)的主要因素。設計多組考慮腹板強屈比、加勁肋間距比、翼腹比、翼緣與腹板強度比和跨高比等因素的模型，并采用校正的有限元分析方法詳細研究各因素對超強系數(shù)的影響規(guī)律。結(jié)果表明：對短剪切型消能梁段，腹板會發(fā)生全截面受剪屈服，翼腹比可有效增大子框架的承載力，翼緣與腹板強度比和跨高比對其超強系數(shù)無明顯影響； 對普通剪切型消能梁段，端部翼緣的屈曲使腹板僅部分截面受剪屈服，且增大翼腹比、翼緣與腹板強度比和跨高比可明顯提高其超強系數(shù)。另外，加勁肋間距比對不同長度剪切型消能梁段的超強系數(shù)均有明顯影響。
［關鍵詞］剪切型消能梁段； 超強系數(shù)； 影響因素； 加勁肋間距比； 跨高比
中圖分類號：TU973文獻標識碼：A文章編號：1002-848X(2020)21-0089-08
Analysis on influence factors and change rules of overstrength coefficient for shear links
HU Shujun1,2, WANG Xuefei3, XIONG Jingang1,2, ZENG Sizhi1,3, DONG Xinwei3
(1 School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031,China; 2 Jiangxi Provincial Engineering Laboratory of Nearly Zero Energy Building, Nanchang 330031, China; 3 Zhongmei Engineering Group Ltd., Nanchang 330001, China)
Abstract:Based on the existing test results, the main factors influencing the overstrength coefficient of shear links with different length ratios were analyzed in detail. Several sets of models were designed considering the web ultimate to yield shear strength ratio, length to stiffener spacing ratio, flange to web area ratio, flange to web strength ratio, and length to depth ratio, and the influence law of each factor on the overstrength coefficient was studied in detail by the corrected finite element analysis method. The results show that for short shear links, the web undergoes full sectional shear yielding, and the flange to web area ratio can effectively increase the load capacity of the sub-frame, while the flange to web strength ratio and length to depth ratio have no significant influence on the overstrength coefficient; for the normal shear links, the buckling of the end flange makes the web can′t be fully yielded in shear, and the increase of the flange to web area ratio, flange to web strength ratio and length to depth ratio can significantly increase the overstrength coefficient. In addition, the length to stiffener spacing ratio has a significant effect on the overstrength coefficient of different lengths of the shear links.
Keywords:shear links; overstrength coefficient; influence factor; length to stiffener spacing ratio; length to depth ratio
*國家自然科學基金項目(51768044, 51908268, 51968047)，江西省自然科學基金資助項目(20181BAB206042)。
作者簡介：胡淑軍，博士，講師，Email:hushujun@ncu.edu.cn； 通信作者：熊進剛，博士，教授，Email:xiongjingang@ncu.edu.cn。
