方钢管混凝土柱—型钢梁加强节点性能研究
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摘要
钢管混凝土节点以其优越的性能现在被越来越多的工程实践所采用，外加劲板方钢管混凝土节点因其受力合理，节点构造简便，易于施工等特点，具有广阔的发展前景。本文运用有限元软件ANSYS对外加劲板方钢管混凝土柱-型钢梁节点通过建立模型，合理的单元选取和网格划分对节点进行非线性有限元分析，较为精确的分析了节点区的应力分布和节点的各项性能指标，弥补了试验中无法直观地了解各细部受力情况的缺陷，得出的一些结论可以为实际工程提供很有价值的参考。主要分析的内容和成果如下：
(1)建立6种不同的加劲板节点有限元模型，对比分析钢管混凝土节点在单调荷载和循环荷载作用下的节点区应力分布、破坏形式、滞回性能和耗能性能。经过综合对比分析，T型加劲板的综合性能最优，在工程实践中能较好的应用。
(2)分析了T型加劲节点沿钢梁长度方向的应力分布，沿钢梁长度方向最大应力出现在远离连接节点处300mm左右，表明适当设计加劲板可以确保节点破坏时在节点区域外的梁截面上形成塑性铰，从而达到“强节点弱杆件”的目的，避免节点的过早破坏。
(3)分析了影响T型加劲节点刚度的主要因素，确定影响节点刚度的各参数对外部T型加劲节点刚度的影响规律。结果分析表明：T型加劲方钢管混凝土柱-型钢梁节点并不是完全是刚接的，在梁端荷载作用下，梁柱之间存在着相对的转动；在所有的影响因素中，对节点刚度影响最大的是梁的截面高度，而水平加劲板的宽度对节点刚度几乎没有影响。
The joint of Concrete-filled steel tube(CFT) have been using by more and more engineering practice because of its ascendant capability now, as a result of it is taken on force logical, the joint structure is briefness and is easy to construct, the joint of exterior stiffening plate concreted-filled rectangular steel tube have amplitude development foreground. On the basic of having read abundant documentation and materials related to the joint of Concrete-Filled steel tube(CFT),this text apply finite element software named ANSYS constitute the joint model, choice proper cell, and divide gridding appropriate, then give finite element analysis on the joint, this analysis accurate describe the stress distributing of the joint area and each performance index of the joint, it can overcome the gap which has not intuitively know each detail loaded instance in experiment, the gained conclusion can supply very valuable reference to practice engineering. The main analysis content and results as follows:
(1) Base six different joint finite element model of stiffening plate, compare and analyze each joint which stress distribution, damage form, hysteretic behavior, dissipative capability. By compositive contrastive analyze, the stiffening T-plate is best in compositive capability, can be preferable applied in engineering practice.
(2) Analyzed the stress distribution in the length direction, the maximum stress appear in the 300mm away from the node, show that design the stiffening plate properly can ensure the plastic ream is keeping away from the node while the girder is destroyed, then carry the point that the node is strong and the member bar is feebleness, avoid the node destroyed earlily.
(3) Analyzed main factors which affect T-stiffener plates joint stiffness, the effect law of the stiffness was confirmed by parameters that affect joint stiffness. The analysis indicated that there was relative rotation between the beam and the column of CFT connection with external stiffeners under the load acting on the beam. The most important factor influencing the stiffness of the connection was the height of H-beam , while the width of the horizontal stiffener had little influence on the stiffness.
(1)建立6种不同的加劲板节点有限元模型，对比分析钢管混凝土节点在单调荷载和循环荷载作用下的节点区应力分布、破坏形式、滞回性能和耗能性能。经过综合对比分析，T型加劲板的综合性能最优，在工程实践中能较好的应用。
(2)分析了T型加劲节点沿钢梁长度方向的应力分布，沿钢梁长度方向最大应力出现在远离连接节点处300mm左右，表明适当设计加劲板可以确保节点破坏时在节点区域外的梁截面上形成塑性铰，从而达到“强节点弱杆件”的目的，避免节点的过早破坏。
(3)分析了影响T型加劲节点刚度的主要因素，确定影响节点刚度的各参数对外部T型加劲节点刚度的影响规律。结果分析表明：T型加劲方钢管混凝土柱-型钢梁节点并不是完全是刚接的，在梁端荷载作用下，梁柱之间存在着相对的转动；在所有的影响因素中，对节点刚度影响最大的是梁的截面高度，而水平加劲板的宽度对节点刚度几乎没有影响。
The joint of Concrete-filled steel tube(CFT) have been using by more and more engineering practice because of its ascendant capability now, as a result of it is taken on force logical, the joint structure is briefness and is easy to construct, the joint of exterior stiffening plate concreted-filled rectangular steel tube have amplitude development foreground. On the basic of having read abundant documentation and materials related to the joint of Concrete-Filled steel tube(CFT),this text apply finite element software named ANSYS constitute the joint model, choice proper cell, and divide gridding appropriate, then give finite element analysis on the joint, this analysis accurate describe the stress distributing of the joint area and each performance index of the joint, it can overcome the gap which has not intuitively know each detail loaded instance in experiment, the gained conclusion can supply very valuable reference to practice engineering. The main analysis content and results as follows:
(1) Base six different joint finite element model of stiffening plate, compare and analyze each joint which stress distribution, damage form, hysteretic behavior, dissipative capability. By compositive contrastive analyze, the stiffening T-plate is best in compositive capability, can be preferable applied in engineering practice.
(2) Analyzed the stress distribution in the length direction, the maximum stress appear in the 300mm away from the node, show that design the stiffening plate properly can ensure the plastic ream is keeping away from the node while the girder is destroyed, then carry the point that the node is strong and the member bar is feebleness, avoid the node destroyed earlily.
(3) Analyzed main factors which affect T-stiffener plates joint stiffness, the effect law of the stiffness was confirmed by parameters that affect joint stiffness. The analysis indicated that there was relative rotation between the beam and the column of CFT connection with external stiffeners under the load acting on the beam. The most important factor influencing the stiffness of the connection was the height of H-beam , while the width of the horizontal stiffener had little influence on the stiffness.
引文
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[2] 韩林海．钢管混凝土结构．科学出版社，2000
[3] 钟善桐．高层钢管混凝土结构．黑龙江科学技术出版社，1999
[4] 蔡绍怀．我国钢管混凝土结构技术的最新发展．土木工程学报，1999(4)
[5] 蒋建飞，史耀华，崔莹，王毅红．论钢管混凝土柱的节点应用现状与存在问题．建筑结构设计，2004(5)：26～27
[6] 方小丹，李少云，陈爱军．新型钢管混凝土柱节点的试验研究．建筑结构学报，1999(5)：2～15
[7] 程志辉，司徒锡乐．新达城广场钢管混凝土柱节点设计．建筑结构，2001(7)：23～26
[8] 汤华，王松帆，周定等．广州合银广场结构设计．建筑结构，2001(7)：19～22
[9] 杨光，黄绍成．北京四川大厦高层结构设计．第十一届全国高层建筑结构学术交流会论文集(辽宁丹东)．北京：中国建筑科学研究院，1990：295～302
[10] 黄汉炎，叶富康，周展开等．钢管高强混凝土柱在“广州好世界广场”超高层建筑工程中的应用．建筑结构，1997(5)：3～7
[11] 容柏生．高层建筑中的钢管混凝土柱及其节点．广东土木与建筑．2002(1)
[12] 陈洪涛，吴时适等．钢管混凝土框架贯通式刚性节点的试验研究．哈尔滨建筑学学报，1999(2)
[13] YOSHIMURA K, KIKICHI K, KUROKI M. Seismic shear strengthening method forexisting R/C short columns. Proceedings of the Third International Conference on Steel—Concrete Composite Structures, 1991.667～682
[14] MORINO S, KAWACUCHI J, YASUZAKI C, et al. Behavior of concrete filled steeltubular three—dimensional subassemblages. Composite Construction in Steel and Concrete Ⅱ, 1993. 726～741
[15] THRAOKA M, MORITA K. Experimental study on structural behavior of concrete-filled square tubular column to steel H-beam connection without diaphragm. Proceedings of the 4th ASCCS International Conference on steel-Concrete Composite Structures, 1994. 190～193
[16] ENDOH K, KOSUCI K, MITSUI Y. Strength of R/C flat slab—to—concrete filled steel tubular column connections (2. Vertical and Repeated Lateral Loading Tests). Proceedings of the International Specialty Conference on Concrete Filled Steel Tubular Structures, 1988.246～252
[17] YOKOYAMA Y, MORITA K, KAWAMATA Y. et al. Structural behavior of steel—beam to concrete—filled square tube column connections reinforced with innerring stiffener. Proceedings of the third International Conference on Steel—Concrete Composite Structures, 1991. 165～170
[18] OH Y S, SHIN K J, MOON T S. Test of concrete—filled box column to H-beam connections. Proceedings of Fifth Pacific Structural Steel Conference, 1998. 881～886
[19] 韩林海．钢管混凝土结构理论与实践．北京：科学出版社，2004
[20] 王秀丽，殷占忠，李庆福等．新型钢框架梁柱节点抗震性能试验研究．建筑钢结构进展，2005，4．
[21] 吕西林，李学平，余勇．方钢管混凝上柱与钢梁连接的设计方法．同济大学学报，2000(1)：1～5．
[22] 王秀丽，沈世钊，朱彦鹏等．轻钢结构在房屋增层改造中的应用．兰州理工大学学报，2004，1．
[23] Deierlein G D, Noguchi H Overview of U S Japan research on the seismic design of composite reinforced Structural Engineering, ASCE,2004,130(2): 361～367
[24] 王万祯，顾强，王秀丽．节点域对钢框架梁柱连接受力性能的影响．建筑结构，2005，12
[25] Federico M M.Momenl.resistant connections of steel frames in seismic areas-Design and reliability.E and FN Spoon, 2000,3
[26] 日本建筑学会著，冯乃谦、叶列平等．钢骨钢筋混凝土结构计算标准及说明．北京：原子能出版社，1998．1
[27] C Matsui, etal;AIJ Design Method for Concrete Filled Steel Tubular Structures, ASCCS Seminar, Innsbruck, 18th, September 1997
[28] 余勇，吕西林，田中清．方钢管混凝土柱与钢梁连接的拉伸试验研究．结构工程师，1999，1
[29] 余勇．方钢管混凝土结构的性能研究：[同济大学博士学位论文]．上海：同济大学，1999
[30] Xilin Lu, Yong Yu etal Experimental study on the seismic behavior in the connection between CFRT column and steel beam Structural Engineering and mechanics 9(4), Apri12000, page365-374
[31] 张大旭，张素梅．钢管混凝土梁柱节点动力性能试验研究．哈尔滨建筑大学学 报，2001(2)
[32] 张大旭，张素梅．钢管混凝土柱与梁节点抗剪承载力．哈尔滨建筑大学学报，2001(6)
[33] 张素梅，张大旭．钢管混凝土柱与梁节点荷载-位移滞回曲线理论分析．哈尔滨建筑大学学报，2001(8)
[34] 中国工程建设标准化协会标准．钢管混凝土结构设计与施工规范(CECS28：90)中国计划出版社．1992
[35] Furlong, R. W., Strength Implications of Connection Details to Composite Columns, Developments in Composite and Mixed Construction, Proceedings of the U.S/Japan Seminar on Composite and Mixed Structural Systems, Gihodo Shuppan, Jan. 1978, Lehigh University. 212～216
[36] 过镇海，时旭东．钢筋混凝土原理和分析．北京：清华大学出版社，2003
[37] Amit H Varma,James M Riclesm,Richard Sause,et al.Seismic demand Predictions of concrete filled steel tube(CFT) beam-columns.Journal of Constructional Steel Research,2002,58:725-758
[38] 易日．使用ANSYS 6.1进行结构力学分析．北京大学出版社，2002
[39] Stephen P. Schneider Associate Member, ASCE, Axially Loaded Concrete—Filled Steel Tubes. Journal of Structural Engineering. 1998(10): 1125～1137
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