CCA内嵌EPS混凝土填充墙钢框架结构受力性能试验研究及有限元分析
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摘要
为减少蒸压无石棉纤维素纤维水泥板(CCA)内嵌EPS混凝土填充墙在侧向荷载作用下的开裂,设计了1榀1∶2缩尺的单层单跨的填充墙两侧带缺口的CCA内嵌EPS混凝土填充墙框架试件KJ-3X,并进行了低周往复荷载试验。此外,还设计了1榀纯框架试件KJ-1和1榀常规CCA填充墙框架试件KJ-2,并对两榀试件进行了低周往复荷载试验。通过3榀试件的对比,分析各试件的破坏特征、滞回曲线和刚度退化,研究带缺口的CCA填充墙与钢框架的协同受力性能和带缺口的CCA填充墙的破坏特征。为了深入研究CCA填充墙的微观破坏特征,还对试件KJ-2、KJ-3X建立有限元模型并进行受力性能分析。结果表明:常规CCA填充墙出现裂缝时的位移角为1/150,带缺口的CCA填充墙出现裂缝时的位移角为1/100,带缺口构造可减小CCA墙板的应力集中,使其开裂得到延缓;与常规构造相比,带缺口的构造可以弱化CCA填充墙对框架的承载力及刚度的贡献,初始刚度可减少6%,并减缓CCA填充墙框架在墙板开裂之后的刚度退化速率。
In order to reduce the cracks of non-asbestos cellulose fiber cement plates autoclaved (CCA) EPS concrete infill walls under lateral cyclic loading,a 1/2 scaled,one-bay one-story steel frame with the notched CCA EPS concrete infill walls KJ-3X was designed and tested under lateral cyclic loading. In addition,a steel frame KJ-1 and a steel frame with CCA infill walls KJ-2 were designed and two specimens were tested under lateral cyclic loading. The failure characteristics,hysteretic loops and stiffness degradation of each specimen were analyzed through comparison.The cooperative mechanical behavior of steel frame with the notched CCA infill walls and the failure characteristics of the notched CCA infill walls were studied. In order to study the micro damage characteristics of CCA infill walls,the finite element model of KJ-2 and KJ-3X were established and mechanical behaviors were analyzed. The results show that the CCA infill walls appear cracks when the drift angle is about 1/150. The notched CCA infill walls appear cracks when the drift angle is about 1/100. The cracking of CCA infill walls is delayed by the notched constructional measures. In addition,the notched constructional measures can reduce the stress concentrations of CCA infill walls.Compared with the conventional constructional measures, the notched constructional measures can reduce the contribution of CCA infill walls to the bearing capacity and stiffness of steel frame,as well as it can reduce the initial stiffness of steel frame by about 6%. Moreover,the notched constructional measures reduce stiffness descent speed of steel frame with CCA infill walls after the CCA infill walls appear cracks.
In order to reduce the cracks of non-asbestos cellulose fiber cement plates autoclaved (CCA) EPS concrete infill walls under lateral cyclic loading,a 1/2 scaled,one-bay one-story steel frame with the notched CCA EPS concrete infill walls KJ-3X was designed and tested under lateral cyclic loading. In addition,a steel frame KJ-1 and a steel frame with CCA infill walls KJ-2 were designed and two specimens were tested under lateral cyclic loading. The failure characteristics,hysteretic loops and stiffness degradation of each specimen were analyzed through comparison.The cooperative mechanical behavior of steel frame with the notched CCA infill walls and the failure characteristics of the notched CCA infill walls were studied. In order to study the micro damage characteristics of CCA infill walls,the finite element model of KJ-2 and KJ-3X were established and mechanical behaviors were analyzed. The results show that the CCA infill walls appear cracks when the drift angle is about 1/150. The notched CCA infill walls appear cracks when the drift angle is about 1/100. The cracking of CCA infill walls is delayed by the notched constructional measures. In addition,the notched constructional measures can reduce the stress concentrations of CCA infill walls.Compared with the conventional constructional measures, the notched constructional measures can reduce the contribution of CCA infill walls to the bearing capacity and stiffness of steel frame,as well as it can reduce the initial stiffness of steel frame by about 6%. Moreover,the notched constructional measures reduce stiffness descent speed of steel frame with CCA infill walls after the CCA infill walls appear cracks.
引文
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[7]李元齐,洪驰,秦雅菲.蒸压纤维水泥板覆面轻钢龙骨式复合墙体抗剪性能试验研究[J].建筑结构,2015,36(9):151-157.(LI Yuanqi,HONG Chi,QINYafei.Experimental study on shear performance of CCA-sheathed light-gauge steel framing walls[J].Building Structure,2015,36(9):151-157.(in Chinese))
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[13]郁有升,谢阳果,李建峰,等.CCA板填充墙钢框架受力性能的有限元研究[J].建筑钢结构进展,2017,19(4):72-77.(YU Yousheng,XIE Yangguo,LI Jianfeng,et al.Finite element analysis on the mechanical properties of CCA sheets in-filled steel frame structure with different constructional measures[J].Progress in Steel Building Structures,2017,19(4):72-77.(in Chinese))
[14]赵晓艳,田稳芩,周明杰.EPS轻集料混凝土配合比及性能试验研究[J].混凝土,2009(2):59-62.(ZHAO Xiaoyan,TIAN Wenling,ZHOU Mingjie.Experimental study on mixture ratio and performance of EPS lightweight concrete[J].Concrete,2009(2):59-62.(in Chinese))
[15]李国强,刘文洋,陆烨,等.两边连接屈曲约束钢板剪力墙受力机理与等效支撑模型[J].建筑结构学报,2015,36(4):33-41.(LI Guoqiang,LIUWenyang,LU Ye,et al.Stress mechanism and equivalent brace model for bucking restrained steel plate shear wall with two-side connections[J].Journal of Building Structures,2015,36(4):33-41.(in Chinese))
[16]孙飞飞,戴成华,李国强.大宽厚比开缝组合钢板墙低周反复荷载试验研究[J].建筑结构学报,2009,30(5):72-81.(SUN Feifei,DAI Chenghua,LIGuoqiang.Cyclic test on large flakiness ratio composite steel plate walls with slits[J].Journal of Building Structures,2009,30(5):72-81.(in Chinese))
[17]陆烨,李国强,孙飞飞.I形大高宽比屈曲约束钢板剪力墙的试验和理论究[J].土木工程学报,2011,44(10):45-52.(LU Ye,LI Guoqing,SUN Feifei.Experimental and theoretical study on slim I-shape bucking-restrained steel plate shear walls[J].China Civil Engineering Journal,2011,44(10):45-52.(in Chinese))
[18]钢及钢产品力学性能试验取样位置及试样制备:GB/T 2975-1998[S].北京:中国建筑工业出版社,1998.(Steel and steel products:location and preparation of test pieces for mechanical testing:GB/T2975-1998[S].Beijing:China Architecture&Building Press,1998.(in Chinese))
[19]金属材料拉伸试验:第1部分:室温试验方法:GB/T228.1-2010[S].北京:中国建筑工业出版社,2010.(Metallic materials:tensile testing:part 1:method of test at room temperature:GB/T 228.1-2010[S].Beijing:China Architecture&Building Press,2010.(in Chinese))
[20]XU J,CHU H,XU Y,et al.Prediction of compressive strength and elastic modulus of expanded polystyrene lightweight concrete[J].Magazine of Concrete Research,2015,67(17):1-9.
[21]高层民用建筑钢结构技术规程:JGJ 99-2015[S].北京:中国建筑工业出版社,2015.(Technical specification for steel structure of tall building:JGJ99-2015[S].Beijing:China Architecture&Building Press,2015.(in Chinese))
[2]蒋欢军,毛俊杰,刘小娟.不同连接方式砌体填充墙钢筋混凝土框架抗震性能试验研究[J].建筑结构学报,2014,35(3):60-67.(JIANG Huanjun,MAOJunjie,LIU Xiaojuan.Experimental study on seismic performance of masonry in-filled RC frame with different types of connections[J].Journal of Building Structures,2014,35(3):60-67.(in Chinese))
[3]金焕.填充墙RC框架结构地震破坏机理及关键抗震措施研究[D].哈尔滨:中国地震局工程力学研究所,2014.(JIN Huan.Research on seismic failure mechanisms and key aseismic measures for masonryinfilled RC frame sructures[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration,2014.(in Chinese))
[4]周云,郭阳照,廖奕发,杨冠男.带SBS层阻尼砌体填充墙钢筋混凝土框架结构抗震性能试验研究[J].土木工程学报,2014,47(9):21-28.(ZHOU Yun,GUOYangzhao,LIAO Yifa,YANG Guannan.Experimental study on seismic behaviors of damped masonry in-filled reinforced concrete frame structures with SBS layers[J].China Civil Engineering Journal,2014,47(9):21-28.(in Chinese))
[5]POLYAKOV S V.On the interactions between masonry filler wall and enclosing frame when loaded in the plane of the wall[R].Oakland:Earthquake Engineering Research Institute,1960:36-42.
[6]唐兴荣,杨亮.不同构造措施的砌体填充墙框架结构抗震性能试验研究[J].建筑结构学报,2012,33(10):75-83.(TANG Xingrong,YANG Liang.Experimental study on seismic behavior of masonry infilled reinforced concrete frame structure with different constructional measures[J].Journal of Building Structures,2012,33(10):75-83.(in Chinese))
[7]李元齐,洪驰,秦雅菲.蒸压纤维水泥板覆面轻钢龙骨式复合墙体抗剪性能试验研究[J].建筑结构,2015,36(9):151-157.(LI Yuanqi,HONG Chi,QINYafei.Experimental study on shear performance of CCA-sheathed light-gauge steel framing walls[J].Building Structure,2015,36(9):151-157.(in Chinese))
[8]BALIK F S,KORKMAZ H H,KAMANLI M,et al.An experimental study on reinforced concrete infilled frames with openings[J].Advanced Materials Research,2013,747:429-432.
[9]曹正罡,杜鹏,房明,等.轻质填充墙装配式钢框架抗震性能试验研究[J].建筑结构学报,2015,36(8):9-15.(CAO Zhenggang,DU Peng,FANG Ming,et al.Experimental research on seismic performance of fabricated frames with lightweight infill walls[J].Journal of Building Structures,2015,36(8):9-15.(in Chinese))
[10]李国强,王城.外挂式和内嵌式ALC墙板钢框架结构的滞回性能试验研究[J].钢结构,2005(1):52-56.(LI Guoqiang,WANG Cheng.The hysteretic behavior of steel frames with ALC out-hung and in-filled walls[J].Steel Construction,2005(1):52-56.(in Chinese))
[11]王波,王静峰,王晓倩.带ALC墙板钢管混凝土框架结构抗震性能试验研究[J].建筑结构学报,2013,34(增刊1):147-153.(WANG Bo,WANG Jingfeng,WANG Xiaoqian.Experimental study on seismic behavior of concrete-filled steel tubular frames with ALCwall panels[J].Journal of Building Structures,2013,34(Suppl.1):147-153.(in Chinese))
[12]RIDDINGTON J R.The influence of initial gaps on infilled frame behavior[J].Proceedings of the Institute of Civil Engineers,1984,77(l):295-310.
[13]郁有升,谢阳果,李建峰,等.CCA板填充墙钢框架受力性能的有限元研究[J].建筑钢结构进展,2017,19(4):72-77.(YU Yousheng,XIE Yangguo,LI Jianfeng,et al.Finite element analysis on the mechanical properties of CCA sheets in-filled steel frame structure with different constructional measures[J].Progress in Steel Building Structures,2017,19(4):72-77.(in Chinese))
[14]赵晓艳,田稳芩,周明杰.EPS轻集料混凝土配合比及性能试验研究[J].混凝土,2009(2):59-62.(ZHAO Xiaoyan,TIAN Wenling,ZHOU Mingjie.Experimental study on mixture ratio and performance of EPS lightweight concrete[J].Concrete,2009(2):59-62.(in Chinese))
[15]李国强,刘文洋,陆烨,等.两边连接屈曲约束钢板剪力墙受力机理与等效支撑模型[J].建筑结构学报,2015,36(4):33-41.(LI Guoqiang,LIUWenyang,LU Ye,et al.Stress mechanism and equivalent brace model for bucking restrained steel plate shear wall with two-side connections[J].Journal of Building Structures,2015,36(4):33-41.(in Chinese))
[16]孙飞飞,戴成华,李国强.大宽厚比开缝组合钢板墙低周反复荷载试验研究[J].建筑结构学报,2009,30(5):72-81.(SUN Feifei,DAI Chenghua,LIGuoqiang.Cyclic test on large flakiness ratio composite steel plate walls with slits[J].Journal of Building Structures,2009,30(5):72-81.(in Chinese))
[17]陆烨,李国强,孙飞飞.I形大高宽比屈曲约束钢板剪力墙的试验和理论究[J].土木工程学报,2011,44(10):45-52.(LU Ye,LI Guoqing,SUN Feifei.Experimental and theoretical study on slim I-shape bucking-restrained steel plate shear walls[J].China Civil Engineering Journal,2011,44(10):45-52.(in Chinese))
[18]钢及钢产品力学性能试验取样位置及试样制备:GB/T 2975-1998[S].北京:中国建筑工业出版社,1998.(Steel and steel products:location and preparation of test pieces for mechanical testing:GB/T2975-1998[S].Beijing:China Architecture&Building Press,1998.(in Chinese))
[19]金属材料拉伸试验:第1部分:室温试验方法:GB/T228.1-2010[S].北京:中国建筑工业出版社,2010.(Metallic materials:tensile testing:part 1:method of test at room temperature:GB/T 228.1-2010[S].Beijing:China Architecture&Building Press,2010.(in Chinese))
[20]XU J,CHU H,XU Y,et al.Prediction of compressive strength and elastic modulus of expanded polystyrene lightweight concrete[J].Magazine of Concrete Research,2015,67(17):1-9.
[21]高层民用建筑钢结构技术规程:JGJ 99-2015[S].北京:中国建筑工业出版社,2015.(Technical specification for steel structure of tall building:JGJ99-2015[S].Beijing:China Architecture&Building Press,2015.(in Chinese))