Theoretical and numerical study on an innovative self-centering energy-dissipative tension-brace system
CHI Pei1, DONG Jun1, PENG Yang1, LIEW J. Y. Richard1,2
1.College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China;
2.Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576
Abstract：Conventional braced frame system which dissipates seismic energy by yielding mechanism would incur large permanent deformations after major earthquakes. Such permanent deformations could affect the structural safety and it is often costly to repair. To address this drawback, a novel tension-brace system capable of self-centering and energy dissipation is proposed. For a given seismic intensity, the proposed system is capable of reducing its stiffness in order to dissipate energy and provide a restoring force to reduce the permanent deformations. The key concept and the mechanics of the self-centering tension-brace system are presented. An analytical model has been developed to determine the load-displacement relationships under monotonic and cyclic loads. The performance of the tension-brace system is further investigated by using nonlinear finite element software ABAQUS. The analysis results show that the tension-brace system can achieve the function of self-centering upon which the storey drift exceeds 2.0%. Both the analytical and numerical models provide the necessary tools to establish design guide for designing the proposed self-centering energy-dissipative tension-brace system.
池 沛1，董 军1，彭 洋1，LIEW J. Y. Richard1,2. 一种新型自复位耗能拉索支撑的理论研究与数值分析[J]. 振动与冲击, 2016, 35(21): 171-176.
CHI Pei1, DONG Jun1, PENG Yang1, LIEW J. Y. Richard1,2. Theoretical and numerical study on an innovative self-centering energy-dissipative tension-brace system. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(21): 171-176.
[1] ANSI/AISC 341-10, Seismic provisions for structural steel buildings [S]. Chicago: American Institute of Steel Construction, 2010.
[2] 熊二刚, 张倩. 中心支撑钢框架结构基于性能的塑性抗震设计 [J]. 振动与冲击, 2013, 32(19): 195-204.
XIONG Er-gang, ZHANG Qian. Performance-based plastic design method for steel concentrically braced frames [J]. Journal of Vibration and Shock, 2013, 32(19): 195-204.
[3] Hsiao P-C, Lehman D E, Berman J W, et al. Seismic vulnerability of older braced frames [J]. Journal of Performance of Constructed Facilities, 2014, 28(1): 108-120.
[4] Akbas B, Sutchiewcharn N, Cai W, et al. Comparative study of special and ordinary braced frames [J]. The Structural Design of Tall and Special Buildings, 2013, 22(13): 989-1022.
[5] 李慎, 苏明周. 基于性能的偏心支撑钢框架抗震设计方法研究[J]. 工程力学, 2014, 31(10): 195-204.
Li shen, Su mingzhou. A performance-based seismic design method for eccentrically braced steel frames [J]. Engineering Mechanics, 2014, 31(10): 195-204. (in Chinese)
[6] Zhao J, Wu B, Ou J. Flexural demand on pin-connected buckling-restrained braces and design recommendations [J]. Journal of Structural Engineering, 2012, 138(11): 1398-1415.
[7] McCormick J, Aburano H, Ikenaga M, et al. Permissible residual deformation levels for building structures considering both safety and human elements [C] // The 14 World Conference on Earthquake Engineering, Beijing, China: Chinese Association of Earthquake Engineering, 2008.
[8] Erochko J, Christopoulos C, Tremblay R, et al. Residual drift response of SMRFs and BRB frames in steel buildings designed according to ASCE 7-05 [J]. Journal of Structural Engineering, 2011, 137(5): 589-599.
[9] FEMA 445 Next-generation performance-based seismic design guidelines: program plan for new and existing buildings [S]. Washington DC, USA: Federal Emergency Management Agency, 2006.
[10] Eurocode 8: Design of structures for earthquake resistance [S]. Brussels, Belgium: European Committee for Standardization, 2013.
[11] Christopoulos C, Tremblay R, Kim H-J, et al. Self-centering energy dissipative bracing system for the seismic resistance of structures: development and validation [J]. Journal of Structural Engineering, 2008, 134(1): 96-107.
[12] 刘璐, 吴斌, 李伟, 等. 一种新型自复位防屈曲支撑的拟静力试验 [J]. 东南大学学报(自然科学版), 2012, 42(3): 536-541.
Liu Lu, Wu Bin, Li Wei, Zhao Junxian. Cyclic tests of novel self-centering buckling-restrained brace [J]. Journal of Southeast University ( Natural Science Edition), 2012, 42(3): 536-541. (in Chinese)
[13] Erochko J, Christopoulos C, Tremblay R. Design and testing of an enhanced-elongation telescoping self-centering energy-dissipative brace [J]. Journal of Structural Engineering, 2015, 141(6): 04014163.
[14] Chou C-C, Chen Y-C, Pham D-H, et al. Steel braced frames with dual-core SCBs and sandwiched BRBs: mechanics, modeling and seismic demands [J]. Engineering Structures, 2014, 72(72): 26-40.
[15] Erochko J, Christopoulos C, Tremblay R. Design, testing, and detailed component modeling of a high-capacity self-centering energy-dissipative brace [J]. Journal of Structural Engineering, 2015, 141(8): 04014193.
[16] GB50011-2010, 建筑抗震设计规范[S]. 北京: 中国建筑工业出版社, 2010.
GB50011-2010, Code for seismic design of buildings [S]. Beijing: China Architecture Industry Press, 2010. (in Chinese)
[17] Chopra A K．结构动力学：理论及其在地震工程中的应用 [M] ．北京：清华大学出版社，2007.
Chopra A K. Dynamics of structures: theory and applications to earthquake engineering [M]． Beijing: Tsinghua University Press, 2007.
[18] Zoghi M. The international handbook of FRP composites in civil engineering [M]. Boca Raton: CRC Press, 2014.
[19] GB 50017-2003, 钢结构设计规范[S]. 北京: 中国计划出版社, 2003.
GB 50017-2003, Code for design of steel structures [S]. Beijing: China Planning Press, 2003. (in Chinese)
[20] Song L-l, Guo T, Chen C. Experimental and numerical study of a self-centering prestressed concrete moment resisting frame connection with bolted web friction devices [J]. Earthquake Engineering and Structural Dynamics, 2014, 43(4): 529-545.
[21] 张其林, 卢家森, 杨联萍, 等. 建筑结构用钢丝束拉索和钢丝绳拉索抗力分项系数研究[J]. 建筑结构, 2004, 34 (11): 40-42,46.
