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1 39 1 Vol. 39 No ADVANCES IN MECHANICS Jan. 25, 2009 *,, ;..,,, 1,,.,., 20,. 20, ,.,,..,,. 1,,.,. ( ),.. : , : (2007CK3066) jingzhchina@163.com

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9 1 : 87 : ; ; ;. 1 Valmundsson E V, Nau J M. Seismic response of building frames with vertical structural irregularities. Journal of Structural Engineering, 1997, 123(1): Negro P, Colombo A. Irregularities induced by nonstructural masonry panels in framed buildings. Engineering Structures, 1997, 19(7): Fernandez J. Earthquake response analysis of buildings considering the effects of structural configuration. In: Bulletin of the International Institute of Seismology and Earthquake Engineering, Tokyo, Japan, Das S, Nau J M. Seismic design aspects of vertically irregular reinforced concrete buildings. Earthquake Spectra, 2003, 19(3): Al-Ali A A K, Krawinkler H. Effects of vertical irregularities on seismic behavior of building structures. Department of Civil and Environmental Engineering, Stanford University, Report No.130, Choi B J. Hysteretic energy response of steel momentresisting frames with vertical mass irregularities. Structural Design of Tall and Special Buildings, 2004, 13(2): Chintanapakdee C, Chopra A K. Seismic response of vertically irregular frames: response history and modal pushover analyses. Journal of Structural Engineering, 2004, 130(8): Fragiadakis M, Vamvatsikos D, Papadrakakis M. Evaluation of the influence of vertical stiffness irregularities on the seismic response of a 9-story steel frame. Earthquake Engineering and Structural Dynamics, 2006, 35(12): Lu Y. Comparative study of seismic behavior of multistory reinforced concrete framed structures. Journal of Structural Engineering, 2002, 128(2): Satrajit D, Nau J M. Seismic design aspects of vertically irregular reinforced concrete buildings. Earthquake Spectra, 2003, 19(3): Robert T, Sina M, Carmen I, Krasimira A. Application of the equivalent static force procedure for the seismic design of multistory buildings with vertical mass irregularity. Canadian Journal of Civil Engineering, 2005, 32(3): , 2000, 22 (2): ,.., 2005, 27(5): 20 25, 27(6): ,,.., 2005, 26(5): ,.. ( ), 2006, 38(5): ,,.., 2006, 39(5): Chopra A K, Clough D P, Clough R W. Earthquake resistance of buildings with a soft first storey. Earthquake Engineering and Structural Dynamics, 1973, 1(4 ): Moehle J P. Seismic response of vertically irregular structures. Journal of Structural Engineering, 1984, 110(9): Aranda G R, Rascon O A. An improved method for seismic analysis of buildings irregular in elevation. In: Proceedings of the Eighth European Conference on Earthquake Engineering, Lisbon, Portugal, 1986: Costa A G. Quantification of vertical irregularities on seismic response of buildings. In: Proceedings of the Eighth Japan Earthquake Engineering Symposium, Tokyo, Japan, Estaeva L. Nonlinear Seismic Response of soft-firststory buildings subjected to Narrow-Band accelerograms. Earthquake Spectra, 1992, 8(3): Wood S L. Seismic response of RC frames with irregular profiles.journal of Structural Engineering, 1992, 118(2): Hidalgo P, Arias A, Cruz E. Influence of vertical structural irregularity on the selection of the method of seismic analysis. In: Proceedings of the fifth US National Conference on Earthquake Engineering, conference in Chicago, Illinois, Earthquake Engineering Research Institute, Oakland, CA, USA, Wong C M, Tso W K. Seismic Loading for Buildings with Setbacks. Canadian Journal of Civil Engineering, 1994, 21(5): Pinto D, Costa A. Effects of vertical irregularities on seismic response of buildings. In: Proceedings of the 10th European Conference, Vienna, Austria, Balkema A A, , GB , , JGJ , , JGJ 99-98, FEMA 369, NEHRP Recommended Provisions for New Buildings and Other Structures. Building Seismic safety Council, Washington D.C, 2000 Commentary 30 Uniform Building Code (UBC1997). International Conference of Building Official, Whittier C A, FEMA 368, NEHRP Recommended Provisions For New Buildings and Other Structures. Building Seismic safety Council, Washington D C, International Building Code (IBC2000). International Code Council, Virginia, USA, Euro code 8: Design of structures for earthquake resistance Part 1: General rules, seismic actions and rules for

10 buildings. Euro codes Committee, Public Enquiry Draft, National Building Code of Canada (NBCC2005). National Research Council of Canada, FEMA 302, NEHRP Recommended Provisions for New Buildings and Other Structures (NEHRP 1997). Building Seismic safety Council, Washington D.C, 2000 RECENT ADVANCES IN RESEARCH ON SEISMIC PERFORMANCE OF VERTICAL IRREGULAR STRUCTURES AND APPLICATIONS TO SEISMIC CODES * ZHOU Jing ZHAO Weifeng LIU Zhiling Civil Engineering and Mechanics College, Xiangtan University, Xiangtan , China Abstract Vertical irregularities of buildings are the major factor which initiates or aggravates the damage failure of structures. In order to improve our understanding of the seismic conceptual design of structures with vertical irregularities, this paper presents the definition of the irregularities of buildings along vertical direction, such as stiffness irregularity, strength irregularity and mass irregularity, the main contents and the damage characteristics under the earthquake actions. The recent research progress in seismic response demand of vertical irregular reinforced concrete structures are summarized, together with relevant articles of limitations on vertical irregular structures described in the current building design codes. Finally, promising directions for future research in this area are suggested on the basis of the current situations. Keywords vertical irregularities structures, seismic performance, earthquake response demand, seismic code for building The project supported by the Science and Technology Planning Project of Hunan Province (2007CK3066) jingzhchina@163.com

Fig. 1 Frame calculation model 1 mm Table 1 Joints displacement mm

Fig. 1 Frame calculation model 1 mm Table 1 Joints displacement mm 33 2 2011 4 ol. 33 No. 2 Apr. 2011 1002-8412 2011 02-0104-08 1 1 1 2 361003 3. 361009 3 1. 361005 2. GB50023-2009 TU746. 3 A Study on Single-span RC Frame Reinforced with Steel Truss System Yuan Xing-ren