- 摘 要
-
(1 鄭州大學土木工程學院, 鄭州 450001;2 成都基準方中建筑設計有限公司鄭州分公司, 鄭州 450003)
摘要: 針對輕鋼龍骨防火外墻在 L 形角鋼連接、異形角鋼連接兩種連接方式下的平面外受力性能進行了試驗研究. 然后采用有限元軟件 ABAQUS 對試件進行模擬分析,模擬結果與試驗結果吻合良好,驗證了有限元模型的有效性. 進而考慮豎向輕鋼龍骨間距及布置方式、橫向輕鋼龍骨厚度、異形角鋼連接件個數(shù)、L 形角鋼與型鋼梁連接自攻螺釘個數(shù)、L 形角鋼厚度六個因素的影響,對輕鋼龍骨防火外墻及其與鋼框架連接的平面外受力性能進行有限元模擬分析. 結果表明:增加異形角鋼連接件個數(shù)或 L 形角鋼的自攻螺釘個數(shù)可提高墻體平面外極限承載力和剛度及連接件平面外剛度,且提高效果最為顯著;減小龍骨間距能提高墻體平面外極限承載力及剛度;增加橫向輕鋼龍骨厚度能提高墻體平面外極限承載力和連接件平面外剛度;增加 L 形角鋼厚度可明顯提高墻體及連接件平面外剛度.
關鍵詞: 輕鋼龍骨; 防火外墻; 平面外受力性能; 連接件; 自攻螺釘
中圖分類號:TU333 文獻標志碼:A 文章編號:1002-848X(2023)05-0127-09
DOI:10. 19701 / j. jzjg. 20201351
Analysis on out-of-plane mechanical behaviors of lightweight steel keel fireproof exterior wall and its connection with steel frame
LI Ke1, WANG Lin1, TANG Wanli2, WANG Xinling1
(1 School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;2 Chengdu JZFZ Architectural Design Co. , Ltd. , Zhengzhou Branch, Zhengzhou 450003, China)
Abstract: The experimental study on the out-of-plane mechanical behaviors of lightweight steel keel fireproof exterior wallswas carried out under the two connection modes of L-shaped angle iron connection and special-shaped angle ironconnection. Then, the finite element software ABAQUS was used to simulate and analyze the specimens. The simulationresults were in good agreement with experimental results, and the validity of the finite element model was verified.Furthermore, considering the influences of six factors including the spacing and arrangement of the vertical lightweight steelkeels, thickness of transverse lightweight steel keel , the number of special-shaped angle iron joints, the number ofself-tapping screws connecting the L-shaped angle iron and the steel beam, and the thickness of the L-shaped angle iron,the finite element simulation analyses of the out-of-plane mechanical behaviors of lightweight steel keel fireproof exteriorwall and its connection with the steel frame were carried out. The results show that increasing the number of special-shapedangle iron joints or the number of self-tapping screws of L-shaped angle iron can improve the out-of-plane bearing capacityand stiffness of the wall and the out-of-plane stiffness of the joint, and the effect is the most significant. Reducing the keelspacing can improve the out-of-plane bearing capacity and stiffness of the wall. Increasing the thickness of transverselightweight steel keel can improve the out-of-plane bearing capacity of the wall and the out-of-plane stiffness of the joint.Increasing the L-shaped angle iron thickness can obviously improve the out-of-plane stiffness of the wall and joint.
Keywords:lightweight steel keel; exterior wall; out-of-plane mechanical behavior; joint; self-tapping screw
∗國家自然科學基金-河南聯(lián)合基金項目(U1804137),國家重點研發(fā)計劃項目(2017YFC1501204),中國博士后科學基金項目(2020M672236).
第一作者:李可,博士,副教授,主要從事結構工程加固方面研究,Email:irwinlike@ 163. com.
[引用本文] 李可,王琳,湯萬里,等. 輕鋼龍骨防火外墻及其與鋼框架連接的平面外受力性能分析[ J]. 建筑結構,2023,53 ( 5):127-135. LI Ke,WANG Lin,TANG Wanli, et al. Analysis on out-of-plane mechanical behaviors oflightweight steel keel fireproof exterior wall and its connection with steel frame [ J]. Building Structure,2023,53 ( 5):127-135.
