Behavior and Design of Skewed Extended Shear Tab Connections.

機譯：傾斜擴展剪力片連接的行為和設計。

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Extended shear tab connections has been introduced in the thirteenth edition of the American Institute of Steel Construction Manual to the structural engineering practice as an alternative to the single plate or as known the shear tab connections. The function of the extended shear tab connection is to transfer the shear force from the beam to the supporting member (column or girder). The main advantage of using extended shear tab connections is to avoid coping of beams in the vicinity of the joint to bring the beam close to the web of the supporting member. Previous studies investigated the behavior of extended shear tab connections for members, joined at right angle, experimentally and analytically. Skewed connections, in general, are commonly used in practice to frame members that their longitudinal axes do not meet at a right angle; the use of extended shear tab connections for skewed members eliminates the excessive beam ends cutting and modifications which makes this type of connections attractive to engineers and fabricators. This study investigates the behavior and design of different configurations of skewed extended shear tab connections using the finite element analysis software ABAQUS.;The study investigated three configurations of the skewed extended shear tab connections: 1) With the plate unstiffened and welded to supporting member web (flexible support), 2) With the plate unstiffened and welded to the supporting member flange (rigid support), 3) And with the plate welded to stiffener plates and supporting member web. To achieve the study goals, finite element analysis for orthogonal configurations were performed. Results were compared with their counterparts obtained from experimental investigation to verify the finite element models. Then, the models were skewed at different angles with results obtained and compared.;It was observed that for stiffened configurations and unstiffened configurations with rigid support, the connection bending and torsional behavior slightly affected by the connections orientation. On the other hand, for the unstiffened configuration with flexible support, the connection behavior significantly affected by the connection orientation, especially the torsional behavior.;A design procedure was proposed based on a parametric study that was performed for skewed extended shear tab connections based on results obtained from finite element analysis for 300 models with different configurations. The variable parameters used for this study are: plate thickness, the distance between the weld line and the bolt line, skewed angle, and number of bolts. These parameters were investigated in terms of the connection vertical displacement, plate twist along the bolt line, plate twist along the weld line, and the connection shear capacity. Based on the parametric study results, a specific design procedure for the skewed extended shear tab connections was proposed and compared with the current design procedure in the AISC Manual 14th edition. Modifications to the current connection lateral stability checks in the literature were addressed too.

機譯：在美國鋼結(jié)構(gòu)學會手冊的第十三版中，將擴展的剪力片連接引入了結(jié)構(gòu)工程實踐，作為單板的替代方案或眾所周知的剪力片連接。擴展的剪力片連接的功能是將剪力從梁傳遞到支撐構(gòu)件（柱或大梁）。使用擴展的剪力片連接的主要優(yōu)點是避免在接合處附近對梁進行覆蓋，以使梁靠近支撐構(gòu)件的腹板。以前的研究通過實驗和分析研究了直角連接的構(gòu)件的擴展剪力片連接的行為。通常，傾斜連接通常在實踐中用于框架構(gòu)件，使其縱軸不成直角相交。對傾斜的構(gòu)件使用擴展的剪切片連接消除了過多的橫梁端部切割和修改，這使得這種類型的連接對工程師和制造商具有吸引力。本研究使用有限元分析軟件ABAQUS來研究偏斜延伸剪力連接的不同構(gòu)造的行為和設計。;該研究研究了偏斜延伸剪力連接的三種構(gòu)造：1）板未加硬并焊接到支撐構(gòu)件腹板上（柔性支撐），2）松開板并將其焊接到支撐構(gòu)件的法蘭上（剛性支撐），3）并將板焊接到加強板和支撐構(gòu)件的腹板上。為了達到研究目的，對正交構(gòu)型進行了有限元分析。將結(jié)果與通過實驗研究獲得的結(jié)果進行比較，以驗證有限元模型。然后，將模型以不同角度進行傾斜，并獲得結(jié)果并進行比較。觀察到，對于帶有剛性支撐的剛性構(gòu)型和非剛性構(gòu)型，連接彎曲和扭轉(zhuǎn)行為會受到連接方向的輕微影響。另一方面，對于具有柔性支撐的非剛構(gòu)型，連接行為受連接方向特別是扭轉(zhuǎn)行為的影響很大?；趨?shù)研究，提出了一種設計程序，該程序基于斜拉擴展剪力片連接進行了基于300種不同配置的模型的有限元分析結(jié)果。用于此研究的可變參數(shù)為：板厚，焊接線與螺栓線之間的距離，偏斜角和螺栓數(shù)量。根據(jù)連接垂直位移，沿螺栓線的板扭曲，沿焊接線的板扭曲以及連接剪切能力研究了這些參數(shù)。根據(jù)參數(shù)研究結(jié)果，提出了一種針對傾斜的擴展剪力片連接的特定設計程序，并將其與AISC手冊第14版中的當前設計程序進行了比較。文獻中也討論了對當前連接側(cè)向穩(wěn)定性檢查的修改。

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作者
Al Hijaj, Mutaz.;
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University of Illinois at Chicago.;

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授予單位 University of Illinois at Chicago.;
學科 Civil engineering.
學位 Ph.D.
年度 2016
頁碼 290 p.
總頁數(shù) 290
原文格式 PDF
正文語種 eng
中圖分類遙感技術(shù);
關(guān)鍵詞

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3. Behavior of skewed extended shear tab connections part I: Connection to supporting web [J] . Al Hijaj Mutaz, Mahamid Mustafa Journal of Constructional Steel Research . 2017,第jana期

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4. Behavior of skewed extended shear tab connections part II: Connection to supporting flange [J] . Mahamid Mustafa, Al Hijaj Mutaz Journal of Constructional Steel Research . 2017,第jana期

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5. Parametric Study and Design Procedure for Skewed Extended Shear-Tab Connections [J] . Mutaz Al Hijaj, Mustafa Mahamid Practice periodical on structural design and construction . 2017,第3期

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6. Behavior of Stiffened Skewed Extended Shear Tab Connections [C] . Mustafa Mahamid, Mutaz Al Hijaj Geotechnical and structural engineering congress . 2016

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Behavior and Design of Skewed Extended Shear Tab Connections.

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