Replaceable Coupling Beam with Combined Dampers
A new type of replaceable coupling beam（RCB） with O-shaped steel plate-viscoelastic combined damper at the mid span was proposed. The O-shaped steel plate damper, viscoelastic damper and combined damper were tested under low-cyclic loading. The test results show that the combined damper has strong energy-dissipation and deformation capacity. The design method for the structure installed with RCBs was proposed. The responses of a super-tall structure with RCBs under the wind and earthquakes were compared with those of the structure with traditional RC coupling beams. The results show that，under the wind and minor earthquake, viscoelastic dampers dissipate energy，while O-shaped steel plate dampers keep in elastic state. Under the rare earthquake，O-shaped steel plate dampers yield and dissipate energy together with viscoelastic damper. The combined dampers play the role of dissipating energy and reducing the response under the wind and the earthquake with different level of intensity. The structure with RCBs exhibits better wind resistance and earthquake resistance capacity than the traditional structures.
Keywords: combined damper, replaceable coupling beam, design procedure, seismic performance
GE X L, HUANG S M,XUE Y T, et cd. Damage analysis and reconstruction suggestions on buildings in Dujiangyan of Wenchuan Ms 8.0 earthquake [j]. Earthquake Resistant Engineering and Retrofitting,2008,30(4):2—11. (in Chinese)
ZHOU Y, LU X L. Lessons learnt from damages of reinforced concrete tall buildings in Chile earthquake and revelations to structural design in China [j]. Journal of Building Structures, 2011,32(5): 17—23. (in Chinese)
FEMA 445 Next—generation performance—based seismic design guidelines: program plan for new and existing buildings [S]. Washington, DC:Federal Emergency Management Agency,2006: 2—8.
NIED, NEES Consortium. Report of the seventh joint planning meeting of NEES/E—Defense collaborative research on earthquake engineering[ R ]. Berkeley:University of California,2010:2—3.
CHEN Y, LU X L, JIANG H J. Detailed simulation analysis of shear wall structures with replaceable coupling beams and experimental verification [j]. Journal of Hunan University (Natural Sciences), 2014,41(9): 48—53. (In Chinese )
FORTNEY P J, SHAHR00Z В M,RASSATI G A. Large-scale testing of a replaceable “fuse” steel coupling beam [J]. Journal of Structural Engineering,2007,133( 12): 1801—1807.
CHUNG H S, MOON В W, LEE S K, et al. Seismic performance of friction dampers using flexure of RC shear wall system [j]. The Structural Design of Tall and Special Buildings ,2009,18(7): 807— 822.
ZHU Q Y, LU X L. A novel multilevel energy dissipative device as an alternative for seismic protection of structures [ C ]// Proceedings of IABSE Conference 2015. Geneva, Switzerland: International Association for Bridge and Structural Engineering, 2015 :1755— 1762.
ZHU С M, ZHANG W P. Structural mechanics [M]. 3rd ed. Beijing: Higher Education Press ,2009 :118—123. (In Chinese )
SHEN К L,SOONG T T,CHANG К C.et al. Seismic behavior of reinforced concrete frame with added viscoelastic dampers [J]. Engineering Structures , 1995,17( 5 ): 372—380.
JGJ3—2010 Technical specification for concrete structures of tall building [S]. Beijing: China Architecture & Building Press,2010: 91—92. (in Chinese)
FANG E H. Conceptual design of reinforced concrete structures in high-rise buildings [М]. Beijing: China Machine Press, 2004: 302—305. (in Chinese)
JIANG Н J, CHEN Y,LU X L. Detailed simulation analysis of shear wall structure with replaceable coupling beams and experimental verification [j]. Journal of Vibration and Shock ,2015,34(9) : 1—8. (in Chinese)
MANDER J B, PRIESTLEY M J N,PARK R. Theoretical stress-strain model for confined concrete [j]. Journal of Structural Engineering, 1988,114( 8 ): 1804—1826.
LYONS R M ,CHRIST0P0UL0S C ,M0NT0GMERY M. Enhancing the seismic performance of RC coupled wall high —rise buildings with viscoelastic coupling dampers [ C ]//Proceedings of 15th World Conference on Earthquake Engineering 2012. Lisbon,Portugal:The Portugal Society of Earthquake Engineering,2012:9223—9233.
LI J,YAN Q. Research on stochastic Fourier wave —number spectrum of fluctuating wind speed [j]. Journal of Tongji University (Natural Sciences) ,2011,39( 12) : 1725—1731. (in Chinese)
- There are currently no refbacks.