外环板式高低梁-方钢管柱节点弹塑性剪切承载力计算
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摘要
为研究外环板式高低梁-方钢管柱节点的弹塑性剪切承载力,对7个十字形外环板式高低梁-方钢管柱节点进行了低周往复加载试验。基于试验,建立了20个考虑不同参数影响的三维实体节点模型并对其进行了非线性有限元分析。结果表明:通过引入节点单侧最小柱梁强度比概念,可将该类节点的破坏模式分为节点区域整体剪切破坏及节点区域部分剪切破坏,且节点域两侧梁高比(db1/db2)、外环板尺寸以及钢管柱的宽厚比(D/t)等因素对节点剪切承载力产生影响。基于屈服线理论并结合试验及有限元分析结果,提出了外环板式高低梁-方钢管柱节点剪切承载力计算方法。该计算方法数据特征稳定,建议公式的结果与试验及仿真模拟结果吻合较好,能较精确地评估该类型节点的弹塑性剪切承载力,可供实际工程设计参考。
To evaluate the panel-zone shear behavior of a H-shaped steel unequal-depth beam-to-column connection with external-diaphragm, seven specimens are fabricated and tested under cyclic loading. Based on the test results, twenty three-dimensional solid models with different parameters are established, and the nonlinear finite element analysis has been carried out. The results show that the shear failure modes can be classified to an entire panel zone mode and a partial panel zone mode by introducing the concept of the minimum column-beam strength ratio of the connection. Moreover, the shear behavior of the panel zone is affected by various parameters,including beam depth ratio(db1/db2), the size of external diaphragms, and width-to-thickness ratio(D/t) of a steel column. Furthermore, based on the yield line theory, test results and numerical results, the design formulas on shear strength have been proposed and the calculated results show a good agreement with the test results and numerical results. The proposed formulas can evaluate the shear strength of the panel zone with adequate accuracy and be adopted in practical design.
To evaluate the panel-zone shear behavior of a H-shaped steel unequal-depth beam-to-column connection with external-diaphragm, seven specimens are fabricated and tested under cyclic loading. Based on the test results, twenty three-dimensional solid models with different parameters are established, and the nonlinear finite element analysis has been carried out. The results show that the shear failure modes can be classified to an entire panel zone mode and a partial panel zone mode by introducing the concept of the minimum column-beam strength ratio of the connection. Moreover, the shear behavior of the panel zone is affected by various parameters,including beam depth ratio(db1/db2), the size of external diaphragms, and width-to-thickness ratio(D/t) of a steel column. Furthermore, based on the yield line theory, test results and numerical results, the design formulas on shear strength have been proposed and the calculated results show a good agreement with the test results and numerical results. The proposed formulas can evaluate the shear strength of the panel zone with adequate accuracy and be adopted in practical design.
引文
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[13]胡方鑫,施刚,石永久.基于断裂力学的高强度钢材梁柱节点受力性能分析[J].工程力学,2015,32(4):41-46.Hu Fangxin,Shi Gang,Shi Yongjiu.Fracture behavior of beam-column connections using high strength steel based on fracture mechanics[J].Engineering Mechanics,2015,32(4):41-46.(in Chinese)
[14]Liao F Y,Han L H,Tao Z.Behaviour of composite joints with concrete encased CFST columns under cyclic loading:Experiments[J].Engineering Structures,2014,59(2):745-764.
[15]Bai Y,Lin Xuchuan.Numerical simulation on seismic collapse of thin-walled steel moment frames considering post local buckling behavior[J].Thin-Walled Structures,2015,94:424-434.
[16]牟犇,井后凯,张春巍,等.外加强环不等高H型钢梁-方钢管柱节点抗震性能试验研究[J].建筑结构学报,2018,39(8):80-89.Mou Ben,Jing Houkai,Zhang Chunwei,et al.Experimental investigation on seismic behavior of unequal-depth H-shape steel beam to column connection with external-diaphragm[J].Journal of Building Structures,2018,39(8):80-89.(in Chinese)
[17]Yoshizato J,Nakamura Y,Kuromatsu J,et al.Experimental study on SHS column to H-Beam connections with exterior plate diaphragms[C].Japan:Summaries of technical papers of Annual Meeting Architectural Institute of Japan.Structures II.Architectural Institute of Japan,1994:1417-1418.(in Japanese)
[18]CECS 208:2010,钢管结构技术规程[S].北京:中国计划出版社,2010.CECS 208:2010,Technical specification for structures with steel hollow sections[S].Beijing:China Planning Press,2010.(in Chinese)
[19]Beedle L S,Topractsologlou A A,Johnston B G.Connection for welded continuous portal frames:part III:discussion of test results and conclusions,Progress report No.4[J].The Welding Journal,1952,11:543-560.
[20]Kuwahara S,Kumano T,Inoue K.The elasto-plastic behavior of joint panels at the connection of rectangular steel column and two H-shaped beams with different depth[J].Journal of Structural and Construction Engineering,2000,65(533):175-181.
[21]牟犇,李茜,王燕,等.外加强环不等高H型钢梁-方钢管柱节点受力性能有限元分析[J].建筑结构学报,2018,39(10):103-111.Mou Ben,Li Xi,Wang Yan,et al.Numerical investigation on unequal-depth-beams-to-column connection panel zone with external-diaphragm[J].Journal of Building Structures,2018,39(10):103-111.(in Chinese)
[22]桑村仁,佐々木道夫,加藤勉.降伏耐力のばらつきを考慮した全体崩壊??????骨組の設計[J].日本建築学会構造系論文報告集,1989,401:151-162.Kuwamura Hitoshi,Sasaki Michio,Kato Ben.Mechanism-based seismic design considering random yield strength[J].Journal of Structural and Construction Engineering,1989,401:151-162.(in Japanese)
[2]Mansfield E H.Studies in collapse analysis of rigid-plastic plates with a square yield diagram[J].Proceedings of the Royal Society of London,1957,241(1226):311-338.
[3]森田耕次,江波戸和正,舟橋明之,等.箱形断面柱のかど溶接を部分溶込み溶接とした柱はり接合部の力学的挙動に関する研究[J].日本建築学会構造系論文報告集,1989,397:48-59.Morita Koji,Ebato Kazumasa,Funahasi Akiyuki,et al.Study on structural behaviors of beam-to-column connections:in case corner weld of box column is partial penetration weld[J].Journal of Structural and Construction Engineering,1989,397:48-59.(In Japanese)
[4]吹田啓一郎,田中剛.角形鋼管柱に接合される梁????接合部の曲げ耐力[J].学術講演梗概集,2000,C-1:731-732.Keiichiro Suita,Tanaka Tsuyoshi.Flexural strength of beam web to square tube column joints[J].Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan,2000,C-1:731-732.(in Japanese)
[5]李成玉,高原,周永.基于屈服线理论的钢管混凝土外加强环节点设计公式推导[J].工程建设与设计,2012(2):44-46.Li Chengyu,Gao Yuan,Zhou Yong.Design formula derivation for exterior stiffener ring connection of concrete fill steel tube based yield-line method[J].Construction and Design for Project,2012(2):44-46.(in Chinese)
[6]牟犇,陈功梅,张春巍,等.带外加强环不等高梁-钢管混凝土柱组合节点抗震性能试验研究[J].建筑结构学报,2017,38(5):77-84.Mou Ben,Chen Gongmei,Zhang Chunwei,et al.Experimental investigation on seismic behavior on steel unequal-depth-beams to CFT column connection with external diaphragm[J].Journal of Building Structures,2017,38(5):77-84.(In Chinese)
[7]牟犇,王玲玲,张春巍,等.考虑楼板影响的外环板式梁柱节点抗震性能:试验研究[J].工程力学,2018,35(2):160-168,213.Mou Ben,Wang Lingling,Zhang Chunwei,et al.Aseismic performance of beam-to-column joints with external-diaphragm considering slab effect:experimental investigation[J].Engineering Mechanics,2018,35(2):160-168,213.(in Chinese)
[8]钱炜武,李威,韩林海,等.带楼板钢管混凝土叠合柱-钢梁节点抗震性能数值分析[J].工程力学,2016,33(增刊):95-100.Qian Weiwu,Li Wei,Han Linhai,et al.Analytical behaviour of concrete-encased concrete-filled steel tubular column to steel beam joints with RC slabs[J].Engineering Mechanics,2016,33(Suppl):95-100.(in Chinese)
[9]赵毅,徐礼华,程康,等.劲性环梁式钢管混凝土节点受力性能研究[J].工程力学,2013,30(增刊):241-247.Zhao Yi,Xu Lihua,Cheng Kang,et al.A analysis on the mechanical behavior of steel reinforced ring-beam connections of concrete filled steel column and RC beam[J].Engineering Mechanics,2013,30(Suppl):241-247.(in Chinese)
[10]周栋梁,钱稼茹,方小丹.RC环梁连接的钢管混凝土柱-RC梁框架计算模型研究[J].工程力学,2005(6):117-121,240.Zhou Dongliang,Qian Jiaru,Fang Xiaodan.Analysis model of steel-tube confined concrete column and RCbeam frame connected by RC ring beam[J].Engineering Mechanics,2005(6):117-121,240.(in Chinese)
[11]徐礼华,凡红,刘胜兵,等.方钢管混凝土柱-钢梁节点抗震性能试验研究与有限元分析[J].工程力学,2008,25(2):122-131.Xu Lihua,Fan Hong,Liu Shengbing,et al.Experimental studies on aseismic behavior of connection between concrete-filled steel square tubular column and steel beam[J].Engineering Mechanics,2008,25(2):122-131.(in Chinese)
[12]薛建阳,翟磊,魏志粉,等.传统风格建筑圆钢管柱-箱形截面双梁节点受力性能试验研究与承载力计算[J].工程力学,2017,34(2):189―196.Xue Jianyang,Zhai Lei,Wei Zhifen,et al.Experimental study on mechanical performance and strength prediction of circle tubular steel column-double box-section beam joints in traditional style building[J].Engineering Mechanics,2017,34(2):189―196.(in Chinese)
[13]胡方鑫,施刚,石永久.基于断裂力学的高强度钢材梁柱节点受力性能分析[J].工程力学,2015,32(4):41-46.Hu Fangxin,Shi Gang,Shi Yongjiu.Fracture behavior of beam-column connections using high strength steel based on fracture mechanics[J].Engineering Mechanics,2015,32(4):41-46.(in Chinese)
[14]Liao F Y,Han L H,Tao Z.Behaviour of composite joints with concrete encased CFST columns under cyclic loading:Experiments[J].Engineering Structures,2014,59(2):745-764.
[15]Bai Y,Lin Xuchuan.Numerical simulation on seismic collapse of thin-walled steel moment frames considering post local buckling behavior[J].Thin-Walled Structures,2015,94:424-434.
[16]牟犇,井后凯,张春巍,等.外加强环不等高H型钢梁-方钢管柱节点抗震性能试验研究[J].建筑结构学报,2018,39(8):80-89.Mou Ben,Jing Houkai,Zhang Chunwei,et al.Experimental investigation on seismic behavior of unequal-depth H-shape steel beam to column connection with external-diaphragm[J].Journal of Building Structures,2018,39(8):80-89.(in Chinese)
[17]Yoshizato J,Nakamura Y,Kuromatsu J,et al.Experimental study on SHS column to H-Beam connections with exterior plate diaphragms[C].Japan:Summaries of technical papers of Annual Meeting Architectural Institute of Japan.Structures II.Architectural Institute of Japan,1994:1417-1418.(in Japanese)
[18]CECS 208:2010,钢管结构技术规程[S].北京:中国计划出版社,2010.CECS 208:2010,Technical specification for structures with steel hollow sections[S].Beijing:China Planning Press,2010.(in Chinese)
[19]Beedle L S,Topractsologlou A A,Johnston B G.Connection for welded continuous portal frames:part III:discussion of test results and conclusions,Progress report No.4[J].The Welding Journal,1952,11:543-560.
[20]Kuwahara S,Kumano T,Inoue K.The elasto-plastic behavior of joint panels at the connection of rectangular steel column and two H-shaped beams with different depth[J].Journal of Structural and Construction Engineering,2000,65(533):175-181.
[21]牟犇,李茜,王燕,等.外加强环不等高H型钢梁-方钢管柱节点受力性能有限元分析[J].建筑结构学报,2018,39(10):103-111.Mou Ben,Li Xi,Wang Yan,et al.Numerical investigation on unequal-depth-beams-to-column connection panel zone with external-diaphragm[J].Journal of Building Structures,2018,39(10):103-111.(in Chinese)
[22]桑村仁,佐々木道夫,加藤勉.降伏耐力のばらつきを考慮した全体崩壊??????骨組の設計[J].日本建築学会構造系論文報告集,1989,401:151-162.Kuwamura Hitoshi,Sasaki Michio,Kato Ben.Mechanism-based seismic design considering random yield strength[J].Journal of Structural and Construction Engineering,1989,401:151-162.(in Japanese)