圆锥形中空夹层钢管混凝土轴压短柱受力机理分析
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摘要
为了研究圆锥形中空夹层钢管混凝土轴压短柱的受力机理,通过有限元软件ABAQUS建立了该类构件的力学模型,并与已有试验数据进行对比,验证了模型的合理性。分析了典型构件的受力全过程荷载-应变关系曲线、钢管与混凝土之间的相互作用力、破坏模态和荷载分配;同时分析了空心率、锥度、钢管径厚比和混凝土强度等参数对相互作用力的影响。结果表明:典型构件荷载-应变关系曲线可分为弹性段、弹塑性段、下降段和稳定段4个阶段;构件破坏是由外钢管向外鼓曲所导致的,破坏截面约在0.8H(H为构件高度)柱高处;锥度和空心率的改变对构件破坏截面位置影响较大,随着锥度和空心率的增大,破坏截面位置逐渐向柱顶靠近;影响外钢管与混凝土之间相互作用力的主要因素有空心率、锥度、外钢管径厚比、外钢管屈服强度和混凝土强度;影响内钢管与混凝土之间相互作用力的主要因素有空心率、锥度和外钢管屈服强度;内钢管径厚比与内钢管屈服强度对混凝土与内、外钢管之间的相互作用力影响较小,可不作为主要参数进行分析。
In order to study the mechanical behavior of tapered concrete-filled double steel tubular(CFDST) short columns under axial compression, the mechanical model was established by the ABAQUS software, and the results were compared with the existing experimental data to verify the rationality of the model. The load-displacement curve, interaction stress between steel tubes and concrete, failure modes and load distribution of typical member were investigated respectively. The hollow ratio, tapered angle, ratio of diameter and thickness of steel tube and concrete strength to the influence of interaction stress between steel tubes and concrete were also analyzed. The result indicates that the load-displacement curve of tapered CFDST short column is divided into elastic stage, elastic-plastic stage, descending stage and maintenance stage.The failure of the member is caused by the outward bending of the outer steel tube, and the fracture cross section is at the height of 0.8H(H is the height of member). The changes of tapered angle and hollow section ratio have a great influence on the position of failure cross section, with the increase of tapered angle and hollow section ratio, the position of failure cross section is closer to the top of the column. The main factors affect the interaction stress between outer steel tube and concrete are hollow section ratio, tapered angle, ratio of diameter and thickness of outer steel tube, outer steel tube yield strength and concrete strength. The main factors affect the compressive stress between inner steel tube and concrete are hollow section ratio, tapered angle and outer steel tube yield strength. The ratio of diameter and thickness of inner steel tube and yield strength of inner steel tube have little effect on the compressive stress between steel tubes and concrete, and may not be analyzed as the main parameter.
In order to study the mechanical behavior of tapered concrete-filled double steel tubular(CFDST) short columns under axial compression, the mechanical model was established by the ABAQUS software, and the results were compared with the existing experimental data to verify the rationality of the model. The load-displacement curve, interaction stress between steel tubes and concrete, failure modes and load distribution of typical member were investigated respectively. The hollow ratio, tapered angle, ratio of diameter and thickness of steel tube and concrete strength to the influence of interaction stress between steel tubes and concrete were also analyzed. The result indicates that the load-displacement curve of tapered CFDST short column is divided into elastic stage, elastic-plastic stage, descending stage and maintenance stage.The failure of the member is caused by the outward bending of the outer steel tube, and the fracture cross section is at the height of 0.8H(H is the height of member). The changes of tapered angle and hollow section ratio have a great influence on the position of failure cross section, with the increase of tapered angle and hollow section ratio, the position of failure cross section is closer to the top of the column. The main factors affect the interaction stress between outer steel tube and concrete are hollow section ratio, tapered angle, ratio of diameter and thickness of outer steel tube, outer steel tube yield strength and concrete strength. The main factors affect the compressive stress between inner steel tube and concrete are hollow section ratio, tapered angle and outer steel tube yield strength. The ratio of diameter and thickness of inner steel tube and yield strength of inner steel tube have little effect on the compressive stress between steel tubes and concrete, and may not be analyzed as the main parameter.
引文
[1] 韩林海.钢管混凝土结构——理论与实践[M].3版.北京:科学出版社,2016.HAN Lin-hai.Concrete Filled Steel Tubular Structures — Theory and Practice[M].3rd ed.Beijing:Science Press,2016.
[2] 黄宏.中空夹层钢管混凝土压弯构件的力学性能研究[D].福州:福州大学,2006 HUANG Hong.Behavior of Concrete Filled Double-skin Steel Tubular Beam-columns[D].Fuzhou:Fuzhou University,2006.
[3] 陶忠,韩林海,黄宏.圆中空夹层钢管混凝土柱力学性能研究[J].土木工程学报,2004,37(10):41-51.TAO Zhong,HAN Lin-hai,HUANG Hong.Mechanical Behaviour of Concrete-filled Double Skin Steel Tubular Columns with Circular Cular Sections[J].China Civil Engineering Journal,2004,37(10):41-51.
[4] 赵均海,郭红香,魏雪英.圆中空夹层钢管混凝土柱承载力研究[J].建筑科学与工程学报,2005,22(3):50-54.ZHAO Jun-hai,GUO Hong-xiang,WEI Xue-ying.Research on Bearing Capacity of Concrete Filled Double Skin Steel Tubes Column[J].Journal of Architecture and Civil Engineering,2005,22(3):50-54.
[5] 黄宏,陶忠,韩林海.圆中空夹层钢管混凝土柱轴压工作机理研究[J].工业建筑,2006,36(11):11-14,36.HUANG Hong,TAO Zhong,HAN Lin-hai.Mechanism of Concrete-filled Double-skin Steel Tubular Columns (CHS Inner and CHS Outer)Subjected to Axial Compression[J].Industrial Construction,2006,36(11):11-14,36.
[6] KOJIRO U,HIROAKI K,KEIICHIRO S.Concrete Filled Double Skin Circular Stub Columns Under Compression[J].Thin-walled Structures,2010,48(1):19-24.
[7] HAN L H,REN Q X,LI W.Tests on Inclined,Tapered and STS Concrete-filled Steel Tubular (CFST) Stub Columns[J].Journal of Constructional Steel Research,2010,66(10):1186-1195.
[8] 任庆新,默亚卿,贾连光,等.圆锥形中空夹层钢管约束混凝土短柱轴向局压力学性能分析[J].工业建筑,2013,43(4):144-148.REN Qing-xin,MO Ya-qing,JIA Lian-guang,et al.Analysis of Conical Double Skin Steel Tubes Confined Concrete Stub Columns Subjected to Axial Partial Compression[J].Industrial Construction,2013,43(4):144-148.
[9] LI W,REN Q X,HAN L H,et al.Behaviour of Tapered Concrete-filled Double Skin Steel Tubular (CFDST) Stub Columns[J].Thin-walled Structures,2012,57:37-48.
[10] 赵均海,孟晓健,刘建军,等.圆中空夹层钢管混凝土短柱的承载力[J].长安大学学报:自然科学版,2009,29(1):70-74.ZHAO Jun-hai,MENG Xiao-jian,LIU Jian-jun,et al.Bearing Capacity of Concrete-filled Double-skin Steel-tube Stub Column[J].Journal of Chang'an University:Nature Science Edition,2009,29(1):70-74.
[11] WANG Z B,LIU L Y.Finite Element Modelling of Concrete-filled Steel Tube Reinforced Concrete Stub Columns Under Axial Compression[J].Applied Mechanics and Materials,2013,351:138-142.
[12] HUAGN H,HAN L H,TAO Z,et al.Analytical Behaviour of Concrete-filled Double Skin Steel Tubular (CFDST) Stub Columns[J].Journal of Constructional Steel Research,2010,66(4):542-555.
[13] TAO Z,HAN L H,ZHAO X L.Behaviour of Concrete-filled Double Skin (CHS inner and CHS Outer) Steel Tubular Stub Columns and Beam-columns[J].Journal of Constructional Steel Research,2004,60(8):1129-1158.
[14] 任庆新,吕艳波,贾连光,等.带端板圆锥形中空夹层钢管混凝土短柱轴向局压力学性能研究[J].工业建筑,2013,43(4):149-155.REN Qing-xing,LU Yan-bo,JIA Lian-guang,et al.Mechanical Behavior of Conical Concrete-filled Double-skin Steel Tubular Stub Columns with Endplate Under Axial Partial Compression[J].Industrial Construction,2013,43(4):149-155.
[15] REN Q X,HAN L H,HOU C,et al.Experimental Behaviour of Tapered CFST Columns Under Combined Compression and Bending[J].Journal of Constructional Steel Research,2017,128:39-52.
[16] ZHANG Y B,HAN L H,LI W.Analytical Behaviour of Tapered CFDST Stub Columns Under Axially Partial Compression[J].Journal of Constructional Steel Research,2017,139:302-314.
[17] HAN L H,TAO Z,HUANG H,et al.Concrete-filled Double Skin (SHS Outer and CHS Inner) Steel Tubular Beam-columns[J].Thin-walled Structures,2004,42(9):1329-1355.
[18] 江韩,储良成,左江,等.轴心受压双钢管混凝土短柱正截面受压承载力理论分析及试验研究[J].建筑结构学报,2008,29(4):96-105.JIANG Han,CHU Liang-cheng,ZUO Jiang,et al.Theoretical Analysis and Experimental Study on Normal Cross-section Load-carrying Capacity for Concrete-filled Double Steel Tubular Short Columns Subjected to Axial Compression Load[J].Journal of Building Structures,2008,29(4):96-105.
[19] LI W,HAN L H,REN Q X,et al.Behavior and Calculation of Tapered CFDST Columns Under Eccentric Compression[J].Journal of Constructional Steel Research,2013,83:127-136.
[20] 刘威,韩林海.ABAQUS分析钢管混凝土轴压性能的若干问题研究[J].哈尔滨工业大学学报,2005,37(增):157-160.LIU Wei,HAN Lin-hai.Research on Some Issues of ABAQUS Analysis on the Behavior of Axially Loaded Concrete-filled Steel Tubes[J].Journal of Harbin Institute of Technology,2005,37(S):157-160.
[21] GB 50936—2014,钢管混凝土结构技术规范[S].GB 50936—2014,Technical Code for Concrete Filled Steel Tubular Structures[S].
[2] 黄宏.中空夹层钢管混凝土压弯构件的力学性能研究[D].福州:福州大学,2006 HUANG Hong.Behavior of Concrete Filled Double-skin Steel Tubular Beam-columns[D].Fuzhou:Fuzhou University,2006.
[3] 陶忠,韩林海,黄宏.圆中空夹层钢管混凝土柱力学性能研究[J].土木工程学报,2004,37(10):41-51.TAO Zhong,HAN Lin-hai,HUANG Hong.Mechanical Behaviour of Concrete-filled Double Skin Steel Tubular Columns with Circular Cular Sections[J].China Civil Engineering Journal,2004,37(10):41-51.
[4] 赵均海,郭红香,魏雪英.圆中空夹层钢管混凝土柱承载力研究[J].建筑科学与工程学报,2005,22(3):50-54.ZHAO Jun-hai,GUO Hong-xiang,WEI Xue-ying.Research on Bearing Capacity of Concrete Filled Double Skin Steel Tubes Column[J].Journal of Architecture and Civil Engineering,2005,22(3):50-54.
[5] 黄宏,陶忠,韩林海.圆中空夹层钢管混凝土柱轴压工作机理研究[J].工业建筑,2006,36(11):11-14,36.HUANG Hong,TAO Zhong,HAN Lin-hai.Mechanism of Concrete-filled Double-skin Steel Tubular Columns (CHS Inner and CHS Outer)Subjected to Axial Compression[J].Industrial Construction,2006,36(11):11-14,36.
[6] KOJIRO U,HIROAKI K,KEIICHIRO S.Concrete Filled Double Skin Circular Stub Columns Under Compression[J].Thin-walled Structures,2010,48(1):19-24.
[7] HAN L H,REN Q X,LI W.Tests on Inclined,Tapered and STS Concrete-filled Steel Tubular (CFST) Stub Columns[J].Journal of Constructional Steel Research,2010,66(10):1186-1195.
[8] 任庆新,默亚卿,贾连光,等.圆锥形中空夹层钢管约束混凝土短柱轴向局压力学性能分析[J].工业建筑,2013,43(4):144-148.REN Qing-xin,MO Ya-qing,JIA Lian-guang,et al.Analysis of Conical Double Skin Steel Tubes Confined Concrete Stub Columns Subjected to Axial Partial Compression[J].Industrial Construction,2013,43(4):144-148.
[9] LI W,REN Q X,HAN L H,et al.Behaviour of Tapered Concrete-filled Double Skin Steel Tubular (CFDST) Stub Columns[J].Thin-walled Structures,2012,57:37-48.
[10] 赵均海,孟晓健,刘建军,等.圆中空夹层钢管混凝土短柱的承载力[J].长安大学学报:自然科学版,2009,29(1):70-74.ZHAO Jun-hai,MENG Xiao-jian,LIU Jian-jun,et al.Bearing Capacity of Concrete-filled Double-skin Steel-tube Stub Column[J].Journal of Chang'an University:Nature Science Edition,2009,29(1):70-74.
[11] WANG Z B,LIU L Y.Finite Element Modelling of Concrete-filled Steel Tube Reinforced Concrete Stub Columns Under Axial Compression[J].Applied Mechanics and Materials,2013,351:138-142.
[12] HUAGN H,HAN L H,TAO Z,et al.Analytical Behaviour of Concrete-filled Double Skin Steel Tubular (CFDST) Stub Columns[J].Journal of Constructional Steel Research,2010,66(4):542-555.
[13] TAO Z,HAN L H,ZHAO X L.Behaviour of Concrete-filled Double Skin (CHS inner and CHS Outer) Steel Tubular Stub Columns and Beam-columns[J].Journal of Constructional Steel Research,2004,60(8):1129-1158.
[14] 任庆新,吕艳波,贾连光,等.带端板圆锥形中空夹层钢管混凝土短柱轴向局压力学性能研究[J].工业建筑,2013,43(4):149-155.REN Qing-xing,LU Yan-bo,JIA Lian-guang,et al.Mechanical Behavior of Conical Concrete-filled Double-skin Steel Tubular Stub Columns with Endplate Under Axial Partial Compression[J].Industrial Construction,2013,43(4):149-155.
[15] REN Q X,HAN L H,HOU C,et al.Experimental Behaviour of Tapered CFST Columns Under Combined Compression and Bending[J].Journal of Constructional Steel Research,2017,128:39-52.
[16] ZHANG Y B,HAN L H,LI W.Analytical Behaviour of Tapered CFDST Stub Columns Under Axially Partial Compression[J].Journal of Constructional Steel Research,2017,139:302-314.
[17] HAN L H,TAO Z,HUANG H,et al.Concrete-filled Double Skin (SHS Outer and CHS Inner) Steel Tubular Beam-columns[J].Thin-walled Structures,2004,42(9):1329-1355.
[18] 江韩,储良成,左江,等.轴心受压双钢管混凝土短柱正截面受压承载力理论分析及试验研究[J].建筑结构学报,2008,29(4):96-105.JIANG Han,CHU Liang-cheng,ZUO Jiang,et al.Theoretical Analysis and Experimental Study on Normal Cross-section Load-carrying Capacity for Concrete-filled Double Steel Tubular Short Columns Subjected to Axial Compression Load[J].Journal of Building Structures,2008,29(4):96-105.
[19] LI W,HAN L H,REN Q X,et al.Behavior and Calculation of Tapered CFDST Columns Under Eccentric Compression[J].Journal of Constructional Steel Research,2013,83:127-136.
[20] 刘威,韩林海.ABAQUS分析钢管混凝土轴压性能的若干问题研究[J].哈尔滨工业大学学报,2005,37(增):157-160.LIU Wei,HAN Lin-hai.Research on Some Issues of ABAQUS Analysis on the Behavior of Axially Loaded Concrete-filled Steel Tubes[J].Journal of Harbin Institute of Technology,2005,37(S):157-160.
[21] GB 50936—2014,钢管混凝土结构技术规范[S].GB 50936—2014,Technical Code for Concrete Filled Steel Tubular Structures[S].