- 摘 要
-
(1 湖南大學(xué)土木工程學(xué)院, 長沙 410082; 2 湖南城市學(xué)院土木工程學(xué)院, 益陽 413099)
摘要: 為研究一種新型抗剪連接的榫卯鋼結(jié)構(gòu)外包 U 型鋼?混凝土組合梁的抗彎性能以及破壞模式,對 6 根此種形式的簡支梁足尺試件進行了抗彎承載力試驗. 試驗中主要考慮翼緣板內(nèi)鋼筋桁架焊接用作抗剪連接件,研究鋼梁高度、內(nèi)部縱筋等對組合梁抗彎剛度和抗彎承載力的影響. 在試驗的基礎(chǔ)上提出了適應(yīng)此種新型抗剪連接件的組合梁跨中撓度計算公式. 研究結(jié)果表明:此種抗剪連接件的組合梁試件承載力良好,破壞形態(tài)均為正截面彎曲破壞,破壞后整個試件具有很大的撓度變形,滿足試件延性設(shè)計要求;提出的修正剛度法計算跨中撓度結(jié)果與試驗值吻合較好.
關(guān)鍵詞: 裝配式結(jié)構(gòu); 榫卯鋼結(jié)構(gòu); 組合梁; 抗剪連接件; 鋼筋桁架; 抗彎剛度
中圖分類號:TU398. 9 文獻標(biāo)志碼:A 文章編號:1002?848X(2022)08?0080?08
DOI:10. 19701 / j.jzjg.20200744
Experimental and theoretical analysis of flexural performance of U?shaped steel?concretecomposite beams covered by tenon and mortise steel structure
SHU Xingping1, LIU Xiaoyu1, HE Ran2, ZHANG Zaihua2
(1 College of Civil Engineering, Hunan University, Changsha 410082, China;2 College of Civil Engineering, Hunan City University, Yiyang 413099, China)
Abstract: In order to study the flexural performance and failure mode of a new type of shear?connected U?shaped steel?concrete composite beams covered by tenon and mortise steel structure, the flexural bearing capacity test was carried out on6 full?scale specimens of this type of simply supported beam. In the test, the welding of steel bar trusses in the flange platewas mainly considered as the shear connector, and the influence of the height of the steel beam and the internal longitudinalreinforcement on the flexural stiffness and flexural bearing capacity of the composite beam was studied. On the basis of thetest, a formula for calculating the mid?span deflection of composite beams suitable for this new type of shear connector wasproposed. The research results show that the composite beam specimen of this shear connector has good bearing capacity,and the failure modes are normal section bending failure. After failure, the entire specimen has a large deflectiondeformation, which meets the ductility design requirements of the specimen. The mid?span deflection calculated by thestiffness method is in good agreement with the experimental value.
Keywords:prefabricated structure; tenon and mortise steel structure; composite beam; shear connector; steel truss;bending stiffness
∗國家自然科學(xué)基金項目(51778219).
第一作者:舒興平,博士,教授,博士生導(dǎo)師,主要從事于鋼結(jié)構(gòu)高等分析與設(shè)計、組合結(jié)構(gòu)設(shè)計計算,Email:hulget@ 163.com.
[引用本文] 舒興平 ,劉筱鈺 ,賀冉 ,等. 榫卯鋼結(jié)構(gòu)外包 U 型鋼?混凝土組合梁抗彎性能試驗及理論分析 [ J].建筑結(jié)構(gòu),2022,52(8):80?87. SHU Xingping,LIU Xiaoyu,HE Ran,et al. Experimental and theoretical analysis of flexuralperformance of U?shaped steel?concrete composite beams covered by tenon and mortise steel structure [ J]. BuildingStructure,2022,52(8):80?87.
