H型薄壁钢梁-轻质混凝土装配式组合楼板受力性能试验研究
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摘要
通过对5块由H型薄壁钢梁和轻骨料混凝土形成的装配式组合楼板的静力加载试验,研究了该种装配式组合楼板常温下的受力性能和变形性能,并对比分析了不同约束条件以及次梁高度对楼板强度和刚度的影响.研究结果表明:该楼板具有良好的整体性和变形能力,当跨中挠度达到L/100时仅出现局部破坏,试件未发生整体坍塌,且具有双向板的受力特征;加强主梁两端约束对提高楼板承载力的作用并不十分明显;增加次梁高度可以提高楼板的极限承载力,但对楼板整体刚度影响较小.
Through the static loading test of 5 fabricated slabs consisting of H-type thin-walled steel beams and lightweight aggregate concrete, the mechanical property and deformation behavior of slabs under normal temperature were studied. The effects of different constraint conditions and height of secondary beams on the strength and stiffness of the composite slabs were analyzed. The results showed that the composite slabs had better entirety and deforming ability. There was only local failure and no overall collapse whereas the deflection at mid-span was up to L/100. The slab specimens had the mechanical characteristics of two-way slabs. Strengthening the restraint at the ends of main beam can improve the bearing capacity of the slabs in a minor degree. Increasing the height of the secondary beam can increase the ultimate bearing capacity of the composite slabs, but it has limited influence on the integral stiffness of the composite slabs.
Through the static loading test of 5 fabricated slabs consisting of H-type thin-walled steel beams and lightweight aggregate concrete, the mechanical property and deformation behavior of slabs under normal temperature were studied. The effects of different constraint conditions and height of secondary beams on the strength and stiffness of the composite slabs were analyzed. The results showed that the composite slabs had better entirety and deforming ability. There was only local failure and no overall collapse whereas the deflection at mid-span was up to L/100. The slab specimens had the mechanical characteristics of two-way slabs. Strengthening the restraint at the ends of main beam can improve the bearing capacity of the slabs in a minor degree. Increasing the height of the secondary beam can increase the ultimate bearing capacity of the composite slabs, but it has limited influence on the integral stiffness of the composite slabs.
引文
[1]甄毅,陈浩军.压型钢板-轻骨料混凝土组合板抗滑移计算[J].长沙理工大学学报(自然科学版),2008,2(1):14-18.ZHEN Yi,CHEN Hao-jun.The calculation of shear slippage of light-weight aggregate concrete composite slabs[J].Journal of Changsha University of Science and Technology(Natural Science),2008,2(1):14-18.
[2]张燕坤,刘阳花,宋小软.压型钢板-轻骨料混凝土组合楼板受弯承载力试验研究[J].工业建筑,2008,38(8):83-85.ZHANG Yan-kun,LIU Yang-hua,SONG Xiao-ruan.Experimental study on flexural bearing capacity of profiled steel sheet-light-weight aggregate concrete floor slabs[J].Industrial Construction,2008,38(8):83-85.
[3]丁成章.轻钢骨架住宅[M].北京:机械工业出版社,2007.
[4]张燕坤,靳海江,姜德民,等.轻骨料混凝土组合楼板力学性能试验研究[J].北方工业大学学报,2008,20(1):80-84.ZHANG Yan-kun,JIN Hai-jiang,JIANG De-min,et al.Research on mechanical properties of lightweight aggregate concrete composite slabs[J].Journal of North China University of Technology,2008,20(1):80-84.
[5]杨勇,聂建国,杨文平,等.闭口型压型钢板-轻骨料混凝土组合板受力性能及动力特性试验研究[J].建筑结构学报,2008,29(6):49-55.YANG Yong,NIE Jian-guo,YANG Wen-ping,et al.Experimental study on mechanical behavior and vibration characteristic of re-entrant trough profiled steel sheetinglightweight concrete composite slabs[J].Journal of Building Structures,2008,29(6):49-55.
[6]孔维超.轻钢桁架-压型钢板轻质砼组合楼盖试验研究[D].重庆:重庆大学,2013.KONG Wei-chao.Experimental Study of Light Steel Truss-Profiled Sheet Lightweight Concrete Composite Slabs[D].Chongqing:Chongqing University,2013.
[7]FRAGIACOMO M,LUKASZEWSKA E.Time-dependent behaviour of timber-concrete composite floors with prefabricated concrete slabs[J].Engineering Structures,2013,52(9):687-696.
[8]YARDIM Y,WALEED A M T,JAAFAR M S,et al.AAC-concrete light weight precast composite floor slab[J].Construction and Building Materials,2013,40(7):405-410.
[9]VARATHANANTHAN J,MAHEN M.Numerical study of LSF floors made of hollow flange channels in fire[J].Journal of Constructional Steel Research,2015,115(12):236-251.
[2]张燕坤,刘阳花,宋小软.压型钢板-轻骨料混凝土组合楼板受弯承载力试验研究[J].工业建筑,2008,38(8):83-85.ZHANG Yan-kun,LIU Yang-hua,SONG Xiao-ruan.Experimental study on flexural bearing capacity of profiled steel sheet-light-weight aggregate concrete floor slabs[J].Industrial Construction,2008,38(8):83-85.
[3]丁成章.轻钢骨架住宅[M].北京:机械工业出版社,2007.
[4]张燕坤,靳海江,姜德民,等.轻骨料混凝土组合楼板力学性能试验研究[J].北方工业大学学报,2008,20(1):80-84.ZHANG Yan-kun,JIN Hai-jiang,JIANG De-min,et al.Research on mechanical properties of lightweight aggregate concrete composite slabs[J].Journal of North China University of Technology,2008,20(1):80-84.
[5]杨勇,聂建国,杨文平,等.闭口型压型钢板-轻骨料混凝土组合板受力性能及动力特性试验研究[J].建筑结构学报,2008,29(6):49-55.YANG Yong,NIE Jian-guo,YANG Wen-ping,et al.Experimental study on mechanical behavior and vibration characteristic of re-entrant trough profiled steel sheetinglightweight concrete composite slabs[J].Journal of Building Structures,2008,29(6):49-55.
[6]孔维超.轻钢桁架-压型钢板轻质砼组合楼盖试验研究[D].重庆:重庆大学,2013.KONG Wei-chao.Experimental Study of Light Steel Truss-Profiled Sheet Lightweight Concrete Composite Slabs[D].Chongqing:Chongqing University,2013.
[7]FRAGIACOMO M,LUKASZEWSKA E.Time-dependent behaviour of timber-concrete composite floors with prefabricated concrete slabs[J].Engineering Structures,2013,52(9):687-696.
[8]YARDIM Y,WALEED A M T,JAAFAR M S,et al.AAC-concrete light weight precast composite floor slab[J].Construction and Building Materials,2013,40(7):405-410.
[9]VARATHANANTHAN J,MAHEN M.Numerical study of LSF floors made of hollow flange channels in fire[J].Journal of Constructional Steel Research,2015,115(12):236-251.