基于滑移连接的防屈曲支撑钢框架节点抗震性能研究
|
摘要
防屈曲支撑(BRB)是一种拉压均可全截面屈服耗能而不屈曲的金属阻尼器,在建筑结构的抗震减震设计中得到广泛应用。然而,由于大变形下支撑框架节点存在显著开合效应,在罕遇地震作用下易出现节点板和相邻梁柱构件的提早断裂现象,限制了BRB抗震性能的充分发挥。为此,在总结BRB钢框架节点的现行设计方法及节点失效模式基础上,提出了可释放节点开合效应的滑移连接节点板,采用低摩擦材料减小接触面摩擦力。建立有限元模型,通过与传统焊接节点板对比,分析两种不同连接对节点板、梁柱和BRB受力性能的影响。以此为基础,设计该类节点足尺试验模型,对其进行拟静力试验,分析其在往复荷载下的抗震性能。研究结果表明:所提出的滑移连接可有效释放节点板与梁柱之间的切向约束和开合效应,显著降低了节点板的塑性损伤,实现了罕遇地震作用下节点板弹性的性能目标;梁塑性铰由节点板端部移至梁柱交界面处,降低了梁柱构件的剪力水平和塑性损伤;在层间位移角4%下各关键构件仍具有饱满稳定的滞回性能,显著提高了BRB钢框架的抗震性能。
Buckling-restrained braces(BRB) are metallic yielding dampers which utilize axial yielding to dissipate seismic energy without significant buckling under tension and compression. Due to their stable cyclic behavior, BRBs have been widely adopted to mitigate structural damage. However, seismic performance of buckling-restrained braced frames(BRBFs) is often limited by premature fracture of corner gusset connections and surrounding framing members due to significant frame-gusset interaction under severe earthquakes. In this paper, commonly used design methods and failure modes for corner gussets connection were first reviewed. A novel sliding gusset connection, which utilized bolted end plates between the gusset plate and the beam-column flanges but minimized shear interaction via employment of low-frictional material, was proposed to mitigate the frame-gusset interaction. Finite element models of two beam-column joints incorporating the new and traditional gusset connections were constructed to investigate the effect of different configuration on the structural behavior of the gusset plate, framing members and BRBs. A quasi-static test was conducted on a full-scale joint incorporating the new gusset connection to examine its seismic performance under cyclic loading. It is found that the new connection is effective in minimizing the frame-gusset shear interaction and in reducing plastic damages on the gusset connection. The gusset connection can still remains essentially elastic under severe earthquakes. It is also found to have a minor rigid-zone effect on the framing members and thus, the plastic hinge of the beam shifts back to the original beam-column section and shear forces and plastic damages on the framing members are reduced. All the key structural components exhibite full and stable cyclic performance even at 4% inter-story drift ratio, indicating that the performance of steel BRBF can be significantly improved by using such a sliding gusset connection.
Buckling-restrained braces(BRB) are metallic yielding dampers which utilize axial yielding to dissipate seismic energy without significant buckling under tension and compression. Due to their stable cyclic behavior, BRBs have been widely adopted to mitigate structural damage. However, seismic performance of buckling-restrained braced frames(BRBFs) is often limited by premature fracture of corner gusset connections and surrounding framing members due to significant frame-gusset interaction under severe earthquakes. In this paper, commonly used design methods and failure modes for corner gussets connection were first reviewed. A novel sliding gusset connection, which utilized bolted end plates between the gusset plate and the beam-column flanges but minimized shear interaction via employment of low-frictional material, was proposed to mitigate the frame-gusset interaction. Finite element models of two beam-column joints incorporating the new and traditional gusset connections were constructed to investigate the effect of different configuration on the structural behavior of the gusset plate, framing members and BRBs. A quasi-static test was conducted on a full-scale joint incorporating the new gusset connection to examine its seismic performance under cyclic loading. It is found that the new connection is effective in minimizing the frame-gusset shear interaction and in reducing plastic damages on the gusset connection. The gusset connection can still remains essentially elastic under severe earthquakes. It is also found to have a minor rigid-zone effect on the framing members and thus, the plastic hinge of the beam shifts back to the original beam-column section and shear forces and plastic damages on the framing members are reduced. All the key structural components exhibite full and stable cyclic performance even at 4% inter-story drift ratio, indicating that the performance of steel BRBF can be significantly improved by using such a sliding gusset connection.
引文
[1] ZHAO J X, WU B, OU J P. A novel type of angle steel buckling-restrained brace: cyclic behavior and failure mechanism[J]. Earthquake Engineering and Structural Dynamics, 2011, 40(10): 1083-1102.
[2] 李国强, 孙飞飞, 陈素文, 等. 大吨位国产TJⅡ型屈曲约束支撑的研制与试验研究[J]. 建筑钢结构进展, 2009, 11(4): 22-26. (LI Guoqiang, SUN Feifei, CHEN Suwen, et al. Development and experiential study of large-tonnage domestic TJⅡbuckling-restrained brace[J]. Progress in Steel Building Structures,2007,11(4):22-26.(in Chinese))
[3] 周云, 陈真,邓雪松, 等. 开孔与开槽式三重钢管防屈曲耗能支撑设计方法研究[J]. 土木工程学报, 2012, 45(2): 20-25.(ZHOU Yun, CHEN Zhen, DENG Xuesong, et al. Study on design method of perforated and notched triple-steel tube buckling-restrained brace[J]. China Civil Engineering Journal, 2012,45(2):20-25. (in Chinese))
[4] 郭彦林, 王小安, 江磊鑫, 等. 装配式防屈曲支撑构件及框架设计理论[J]. 结构工程师, 2010, 26(6): 164-176.(GUO Yanlin, WANG Xiaoan, JIANG Leixin, et al. Design theory of assembled buckling-restrained brces and buckling-restrained braced frames[J]. Structural Engineers, 2010,26(6):164-176. (in Chinese))
[5] TSAI K C, LAI J W, HWANG Y C, et al. Reserch and application of double-corebuckling restrained braces in Taiwan[C]// 13th World Conference on Earthquake Engineering. Tokyo: International Association for Earthquake Engineering, 2004: No.2079.
[6] 潘毅, 耿鹏飞,郭阳照, 等. 两阶段耗能屈曲约束支撑体系减震效果分析[J]. 西南交通大学学报, 2015, 50(5):858-865. (PAN Yi, GENG Pengfei, GUO Yangzhao, et al. Analysis of damping effect in two-stage energy dissipation damping system of buckling restrained braces[J]. Journal of Southwest Jiaotong University, 2015,50(5):858-865. (in Chinese))
[7] 潘毅, 高宪,易路行,等.基于剪力比和刚度比的防屈曲支撑-RC框架抗震设计方法分析[J]. 世界地震工程, 2017, 33(4):59- 67. (PAN Yi, GAO Xian, YI Luxing, et al. Investigation of the seismic design methods of buckling-restrained braced-reinforced concrete frame structures based on shear ratio and stiffness ratio[J]. World Earthquake Engineering, 2017, 33(4):59- 67. (in Chinese))
[8] 潘毅,阎勋章,易路行,等.基于剪力比的防屈曲支撑-RC框架抗震设计方法研究[J]. 工程力学, 2018, 35(3):96-105. (PAN Yi, YAN Xunzhang, YI Luxing, et al. Study on the seismic ddesign of bucking-restrained braced-reinforced concrete frame structures based on shear force ratio[J]. Engineering Mechanics, 2018, 35(3):96-105. (in Chinese))
[9] KANEKO K, KASAI K, MOTOYUI S, et al. Analysis of beam-column-gusset components in 5-story value-added frame[C]// Proceeding of the 14th World Conference on Earthquake Engineering. Tokyo: International Association for Earthquake Engineering, 2008: 1-8.
[10] CHOU C C, LIU J H, PHAM D H. Steel buckling-restrained braced frames with single and dual corner gusset connections: seismic tests and analyses[J]. Earthquake Engineering and Structural Dynamics, 2012, 41(7): 1137-1156.
[11] LIN P C, TSAI K C, WU A C, ET Al. Seismic design and test of gusset connections for buckling-restrained braced frames[J]. Earthquake Engineering and Structural Dynamics, 2014, 43(3): 565-587.
[12] LIN P C, TSAI K C, WU A C, et al. Seismic design and experiment of single and coupled corner gusset connections in a full-scale two-story buckling-restrained braced frame[J]. Earthquake Engineering and Structural Dynamics, 2015, 44(13): 2177-2198.
[13] PALMER K D, CHRISTOPULOS A S, LEHMAN D E, et al. Experimental evaluation of cyclically loaded, large-scale, planar and 3-D buckling-restrained braced frames[J]. Journal of Constructional Steel Research, 2014, 101(10): 415- 425.
[14] Seismic provisions for structural steel buildings: ANSI/AISC 341-16[S]. Chicago, Illinois: American Institute of Steel Construction (AISC), 2016.
[15] THORNTON W A. Bracing connections for heavy construction[J]. Engineering Journal, 1984, 21(3): 139-148.
[16] KASAI K, OOKI Y, MOTOYUI S, et al. Results of recent E-defense test on full-scale steel building: part 3: experiments on dampers and frame subassemblies[C]//Structures Congress 2008. Reston VA: ASCE, 2008: 1-12.
[17] LEE C H. Seismic design of rib-reinforced steel moment connections based on equivalent strut model[J]. Journal of Structural Engineering, 2002, 128(9): 1121-1129.
[18] 孔瑜文, 赵俊贤, 周云. 防屈曲支撑角部节点板与钢框架的相互作用效应[J]. 土木工程学报, 2016, 49(增刊1): 107-113. (KONG Yuwen, ZHAO Junxian, ZHOU Yun. Interaction between corner gusset connections of buckling-restrained braces and steel frame[J]. China Civil Engineering Journal, 2016,19(Suppl.1):107-113. (in Chinese))
[19] FAHNESTOCK L A, RICLES J M, SAUSE R. Experimental evaluation of a large-scale buckling-restrained braced frame[J]. Journal of Structural Engineering, 2007, 133(9): 1205-1214.
[20] BERMAN J, BRUNEAU M. Cyclic testing of a buckling restrained braced frame with unconstrained gusset connections[J]. Journal of Structural Engineering, 2009, 135(12): 1499-1510.
[21] CHEN Q, WANG C L, MENG S P, et al. Effect of the unbonding materials on the mechanic behavior of all-steel buckling-restrained braces[J]. Engineering Structures, 2016, 111: 478- 493.
[22] 紧固件机械性能-螺栓、螺钉和螺柱:GB/T 3098.1—2010[S]. 北京:中国标准出版社, 2010. (Mechanical properties of fasteners-bolts, screws and studs: GB/T 3098.1—2010[S]. Beijing: Standard Press of China, 2010. (in Chinese))
[2] 李国强, 孙飞飞, 陈素文, 等. 大吨位国产TJⅡ型屈曲约束支撑的研制与试验研究[J]. 建筑钢结构进展, 2009, 11(4): 22-26. (LI Guoqiang, SUN Feifei, CHEN Suwen, et al. Development and experiential study of large-tonnage domestic TJⅡbuckling-restrained brace[J]. Progress in Steel Building Structures,2007,11(4):22-26.(in Chinese))
[3] 周云, 陈真,邓雪松, 等. 开孔与开槽式三重钢管防屈曲耗能支撑设计方法研究[J]. 土木工程学报, 2012, 45(2): 20-25.(ZHOU Yun, CHEN Zhen, DENG Xuesong, et al. Study on design method of perforated and notched triple-steel tube buckling-restrained brace[J]. China Civil Engineering Journal, 2012,45(2):20-25. (in Chinese))
[4] 郭彦林, 王小安, 江磊鑫, 等. 装配式防屈曲支撑构件及框架设计理论[J]. 结构工程师, 2010, 26(6): 164-176.(GUO Yanlin, WANG Xiaoan, JIANG Leixin, et al. Design theory of assembled buckling-restrained brces and buckling-restrained braced frames[J]. Structural Engineers, 2010,26(6):164-176. (in Chinese))
[5] TSAI K C, LAI J W, HWANG Y C, et al. Reserch and application of double-corebuckling restrained braces in Taiwan[C]// 13th World Conference on Earthquake Engineering. Tokyo: International Association for Earthquake Engineering, 2004: No.2079.
[6] 潘毅, 耿鹏飞,郭阳照, 等. 两阶段耗能屈曲约束支撑体系减震效果分析[J]. 西南交通大学学报, 2015, 50(5):858-865. (PAN Yi, GENG Pengfei, GUO Yangzhao, et al. Analysis of damping effect in two-stage energy dissipation damping system of buckling restrained braces[J]. Journal of Southwest Jiaotong University, 2015,50(5):858-865. (in Chinese))
[7] 潘毅, 高宪,易路行,等.基于剪力比和刚度比的防屈曲支撑-RC框架抗震设计方法分析[J]. 世界地震工程, 2017, 33(4):59- 67. (PAN Yi, GAO Xian, YI Luxing, et al. Investigation of the seismic design methods of buckling-restrained braced-reinforced concrete frame structures based on shear ratio and stiffness ratio[J]. World Earthquake Engineering, 2017, 33(4):59- 67. (in Chinese))
[8] 潘毅,阎勋章,易路行,等.基于剪力比的防屈曲支撑-RC框架抗震设计方法研究[J]. 工程力学, 2018, 35(3):96-105. (PAN Yi, YAN Xunzhang, YI Luxing, et al. Study on the seismic ddesign of bucking-restrained braced-reinforced concrete frame structures based on shear force ratio[J]. Engineering Mechanics, 2018, 35(3):96-105. (in Chinese))
[9] KANEKO K, KASAI K, MOTOYUI S, et al. Analysis of beam-column-gusset components in 5-story value-added frame[C]// Proceeding of the 14th World Conference on Earthquake Engineering. Tokyo: International Association for Earthquake Engineering, 2008: 1-8.
[10] CHOU C C, LIU J H, PHAM D H. Steel buckling-restrained braced frames with single and dual corner gusset connections: seismic tests and analyses[J]. Earthquake Engineering and Structural Dynamics, 2012, 41(7): 1137-1156.
[11] LIN P C, TSAI K C, WU A C, ET Al. Seismic design and test of gusset connections for buckling-restrained braced frames[J]. Earthquake Engineering and Structural Dynamics, 2014, 43(3): 565-587.
[12] LIN P C, TSAI K C, WU A C, et al. Seismic design and experiment of single and coupled corner gusset connections in a full-scale two-story buckling-restrained braced frame[J]. Earthquake Engineering and Structural Dynamics, 2015, 44(13): 2177-2198.
[13] PALMER K D, CHRISTOPULOS A S, LEHMAN D E, et al. Experimental evaluation of cyclically loaded, large-scale, planar and 3-D buckling-restrained braced frames[J]. Journal of Constructional Steel Research, 2014, 101(10): 415- 425.
[14] Seismic provisions for structural steel buildings: ANSI/AISC 341-16[S]. Chicago, Illinois: American Institute of Steel Construction (AISC), 2016.
[15] THORNTON W A. Bracing connections for heavy construction[J]. Engineering Journal, 1984, 21(3): 139-148.
[16] KASAI K, OOKI Y, MOTOYUI S, et al. Results of recent E-defense test on full-scale steel building: part 3: experiments on dampers and frame subassemblies[C]//Structures Congress 2008. Reston VA: ASCE, 2008: 1-12.
[17] LEE C H. Seismic design of rib-reinforced steel moment connections based on equivalent strut model[J]. Journal of Structural Engineering, 2002, 128(9): 1121-1129.
[18] 孔瑜文, 赵俊贤, 周云. 防屈曲支撑角部节点板与钢框架的相互作用效应[J]. 土木工程学报, 2016, 49(增刊1): 107-113. (KONG Yuwen, ZHAO Junxian, ZHOU Yun. Interaction between corner gusset connections of buckling-restrained braces and steel frame[J]. China Civil Engineering Journal, 2016,19(Suppl.1):107-113. (in Chinese))
[19] FAHNESTOCK L A, RICLES J M, SAUSE R. Experimental evaluation of a large-scale buckling-restrained braced frame[J]. Journal of Structural Engineering, 2007, 133(9): 1205-1214.
[20] BERMAN J, BRUNEAU M. Cyclic testing of a buckling restrained braced frame with unconstrained gusset connections[J]. Journal of Structural Engineering, 2009, 135(12): 1499-1510.
[21] CHEN Q, WANG C L, MENG S P, et al. Effect of the unbonding materials on the mechanic behavior of all-steel buckling-restrained braces[J]. Engineering Structures, 2016, 111: 478- 493.
[22] 紧固件机械性能-螺栓、螺钉和螺柱:GB/T 3098.1—2010[S]. 北京:中国标准出版社, 2010. (Mechanical properties of fasteners-bolts, screws and studs: GB/T 3098.1—2010[S]. Beijing: Standard Press of China, 2010. (in Chinese))
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |