方钢管混凝土柱-H型钢梁框架变梁异型节点受力性能试验研究
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摘要
为了研究方钢管混凝土柱-H型钢梁框架变梁异型节点的受力性能,按1/3比例设计并制作了4个左右梁截面不等高的弱节点模型,通过施加恒定竖向荷载和低周往复水平荷载对节点模型进行了拟静力试验,试验变化参数为高低梁高差比(0. 13、0. 26、0. 39、0. 52),获取了该类节点的滞回性能、应变及变形的规律,分析了节点的破坏特征、受力性能、承载能力、延性、梁高差比对节点破坏模式的影响,基于试验结果验证了抗剪承载力计算式对变截面弱节点的适用性。结果表明:4个试件破坏都发生在节点核心区,满足"强构件弱节点"的设计要求,主要破坏模式为节点核心区的剪切破坏;随着梁高差比的减小,节点的极限承载力增大,节点进入塑性阶段之前承载力无明显退化,从屈服到破坏承载力显著退化;延性系数平均值为3. 94,节点具有良好的变形能力;抗剪承载力计算公式基本适用于此类异型节点。
In order to research the mechanical behavior of abnormal joints of concrete-filled square steel tube columns and H-shaped steel beams,four 1/3-scaled joints,as weak connection,with unequal section heights of leet and right beams were designed and manufactured. A quasi-static test was carried out in the joint model by applying a constant vertical load and low cyclic horizontal load. Beam height difference ratios( 0. 13,0. 26,0. 39,0. 52) were used to obtain the hysteretic behavior,strain and deformation laws of the joints. The influence of the failure characteristics,mechanical properties,bearing capacity,ductility and beam height difference ratio of the joints on the failure model of the joints were analyzed. Based on the test results,the applicability of the formula for calculating the shear capacity to the joints is verified. The results show that the failure modes of the four specimens are mainly shear the failure in the core area of the joint,which meet the design requirements of the"strong member and weak joint". With the decrease of the ratio of beam height difference,the ultimate bearing capacity of the joint increased,and the bearing capacity of the joint don't deteriorate significantly before it enter the plastic stage,but deteriorated significantly from yielding failure. The average ductility factor is 3. 94,and the joints has good deformation capacity. The formula for calculating the shear capacity is basically applicable to such special-shaped joints.
In order to research the mechanical behavior of abnormal joints of concrete-filled square steel tube columns and H-shaped steel beams,four 1/3-scaled joints,as weak connection,with unequal section heights of leet and right beams were designed and manufactured. A quasi-static test was carried out in the joint model by applying a constant vertical load and low cyclic horizontal load. Beam height difference ratios( 0. 13,0. 26,0. 39,0. 52) were used to obtain the hysteretic behavior,strain and deformation laws of the joints. The influence of the failure characteristics,mechanical properties,bearing capacity,ductility and beam height difference ratio of the joints on the failure model of the joints were analyzed. Based on the test results,the applicability of the formula for calculating the shear capacity to the joints is verified. The results show that the failure modes of the four specimens are mainly shear the failure in the core area of the joint,which meet the design requirements of the"strong member and weak joint". With the decrease of the ratio of beam height difference,the ultimate bearing capacity of the joint increased,and the bearing capacity of the joint don't deteriorate significantly before it enter the plastic stage,but deteriorated significantly from yielding failure. The average ductility factor is 3. 94,and the joints has good deformation capacity. The formula for calculating the shear capacity is basically applicable to such special-shaped joints.
引文
1中华人民共和国建设部.钢结构设计规范:GB 50017—2017[S].北京:中国计划出版社,2017Ministry of Construction of the People's Republic of China. Code for design of steel structures:GB 50017—2017[S]. Beijing:China Planning Publishing House,2017
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4 Xu C X,Peng S,Deng J,et al. Study on seismic behavior of encased steel jacket-strengthened earthquake-damaged composite steelconcrete columns[J]. Journal of Building Engineering,2018,17:154-166
5 Peng S,Xu C X,Lu M X,et al. Experimental research and finite element analysis on seismic behavior of CFRP-strengthened seismicdamaged composite steel-concrete frame columns[J]. Engineering Structures,2018,155:50-60
6 李成玉,戚玉林,许成祥,等.方钢管混凝土柱-钢梁T形件节点受力性能研究[J].建筑结构学报,2017,38(增刊1):409-416Li Chengyu,Qi Yulin,Xu Chengxiang,et al. Study on mechanical behavior of T-joints of concrete filled square steel tubular columns and steel beams[J]. Journal of Architectural Structures,2017,38(S1):409-416
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8 许成祥,万波,张继承,等.十字形钢管混凝土柱框架中节点抗震性能试验研究[J].建筑结构,2012,42(3):80-83Xu Chengxiang,Wang Bo,Zhang Jicheng,et al. Experimental study on seismic behavior of joints in cross-shaped concrete filled steel tubular frame[J]. Architectural Structure,2012,42(3):80-83
9 薛建阳,胡宗波,彭修宁,等.钢结构箱形柱与梁异型节点破坏机理的试验研究[J].建筑结构学报,2010,31(增刊1):50-54Xue Jianyang,Hu Zongbo,Peng Xiuning,et al. Experimental study on failure mechanism of steel structure box column and beam joint[J]. Journal of Architectural Structure,2010,31(S1):50-54
10 王博,白国良,代慧娟,等.火电厂主厂房型钢混凝土混合结构异型中节点抗震性能试验研究[J].建筑结构学报,2013,34(12):26-34Wang Bo,Bai Guoliang,Dai Huijuan,et al. Experimental study on seismic behavior of special-shaped mid-joints of steel-concrete composite structures in main power plants[J]. Journal of Architectural Structures,2013,34(12):26-34
11 刘伯权,邢国华,吴涛,等.钢筋混凝土框架异型中节点抗裂性能试验研究[J].土木工程学报,2009,42(10):67-73Liu Boquan,Xing Guohua,Wu Tao,et al. Experimental study on crack resistance of irregular middle joints of reinforced concrete frames[J]. Journal of Civil Engineering,2009,42(10):67-73
12 中华人民共和国国家标准.金属材料室温拉伸试验方法:GB/T228 —2002[S].北京:中国建筑工业出版社,2002National Standards of the People's Republic of China. Method of tensile testing of metal materials at room temperature:GB/T 228—2002[S]. Beijing:China Construction Industry Press,2002
13 刘晓刚,樊健生,陶慕轩,等.钢管混凝土柱-钢梁节点核心区受剪承载力计算对比研究[J].建筑结构学报,2012,33(2):85-92Liu Xiaogang,Fan Jiansheng,Tao Muxuan,et al. Comparing study on calculation of shear bearing capacity of concrete filled steel tube column-steel beam joint core area[J]. Journal of Architectural Structures,2012,33(2):85-92
2 李星荣,魏才昂.钢结构连接节点设计手册[M].北京:中国建筑工业出版社,2014Li Xingrong,Wei caiang. Design manual for steel structure joint[M]. Beijing:China Construction Industry Press,2014
3 同济大学,浙江杭萧钢构股份有限公司.矩形钢管混凝土结构技术规程:CECS 159:2004[S].北京:中国计划出版社,2004:27-38Tongji University, Zhejiang Hangxiao Steel Structure Co., Ltd.Technical specification for rectangular concrete filled steel tube structure:CECS 159:2004[S]. Beijing:China Planning Press,2004:27-38
4 Xu C X,Peng S,Deng J,et al. Study on seismic behavior of encased steel jacket-strengthened earthquake-damaged composite steelconcrete columns[J]. Journal of Building Engineering,2018,17:154-166
5 Peng S,Xu C X,Lu M X,et al. Experimental research and finite element analysis on seismic behavior of CFRP-strengthened seismicdamaged composite steel-concrete frame columns[J]. Engineering Structures,2018,155:50-60
6 李成玉,戚玉林,许成祥,等.方钢管混凝土柱-钢梁T形件节点受力性能研究[J].建筑结构学报,2017,38(增刊1):409-416Li Chengyu,Qi Yulin,Xu Chengxiang,et al. Study on mechanical behavior of T-joints of concrete filled square steel tubular columns and steel beams[J]. Journal of Architectural Structures,2017,38(S1):409-416
7 李成玉,王振,许成祥,等.方钢管柱-H形钢梁槽钢节点受力性能研究[J].工业建筑,2017,47(6):144-151Li Chengyu,Wang Zhen,Xu Chengxiang,et al. Mechanical behavior of square steel pipe column-H-shaped steel beam channel steel joint[J]. Industrial Building,2017,47(6):144-151
8 许成祥,万波,张继承,等.十字形钢管混凝土柱框架中节点抗震性能试验研究[J].建筑结构,2012,42(3):80-83Xu Chengxiang,Wang Bo,Zhang Jicheng,et al. Experimental study on seismic behavior of joints in cross-shaped concrete filled steel tubular frame[J]. Architectural Structure,2012,42(3):80-83
9 薛建阳,胡宗波,彭修宁,等.钢结构箱形柱与梁异型节点破坏机理的试验研究[J].建筑结构学报,2010,31(增刊1):50-54Xue Jianyang,Hu Zongbo,Peng Xiuning,et al. Experimental study on failure mechanism of steel structure box column and beam joint[J]. Journal of Architectural Structure,2010,31(S1):50-54
10 王博,白国良,代慧娟,等.火电厂主厂房型钢混凝土混合结构异型中节点抗震性能试验研究[J].建筑结构学报,2013,34(12):26-34Wang Bo,Bai Guoliang,Dai Huijuan,et al. Experimental study on seismic behavior of special-shaped mid-joints of steel-concrete composite structures in main power plants[J]. Journal of Architectural Structures,2013,34(12):26-34
11 刘伯权,邢国华,吴涛,等.钢筋混凝土框架异型中节点抗裂性能试验研究[J].土木工程学报,2009,42(10):67-73Liu Boquan,Xing Guohua,Wu Tao,et al. Experimental study on crack resistance of irregular middle joints of reinforced concrete frames[J]. Journal of Civil Engineering,2009,42(10):67-73
12 中华人民共和国国家标准.金属材料室温拉伸试验方法:GB/T228 —2002[S].北京:中国建筑工业出版社,2002National Standards of the People's Republic of China. Method of tensile testing of metal materials at room temperature:GB/T 228—2002[S]. Beijing:China Construction Industry Press,2002
13 刘晓刚,樊健生,陶慕轩,等.钢管混凝土柱-钢梁节点核心区受剪承载力计算对比研究[J].建筑结构学报,2012,33(2):85-92Liu Xiaogang,Fan Jiansheng,Tao Muxuan,et al. Comparing study on calculation of shear bearing capacity of concrete filled steel tube column-steel beam joint core area[J]. Journal of Architectural Structures,2012,33(2):85-92