Seismic analysis of a super high-rise steel structure with horizontal strengthened storeys

Abstract

Horizontal strengthened storeys are widely used in super high-rise steel structures to improve the lateral structural rigidity. This use has great effects on the seismic properties of the entire structure. The seismic properties of the Wuhan International Securities Building (a 68-storey super high-rise steel structure with three horizontal strengthened storeys) were evaluated in this study. Two approaches, i.e., mode-superposition response spectrum analysis and time-history analysis, were employed to calculate the seismic response of the structure. The response spectrum analysis indicated that transition parts near the three strengthened storeys were weak zones of the structure because of the abrupt change in rigidity. In the response spectrum analysis approach, the Square Root of Sum of Square (SRSS) method was recommended when the vertical seismic effects could be ignored. However, the complete quadratic combination (CQC) method was superior to SRSS method when the vertical seismic effects should be considered. With the aid of time-history analysis, the seismic responses of the structure were obtained. The whiplash effect that spectrum analysis cannot reveal was observed through time-history analysis. This study provides references for the seismic design of super high-rise steel structures with horizontal strengthened storeys.

Keywords

seismic analysis / steel structure / super high-rise / horizontal strengthened storey / response spectrum analysis / time-history analysis

References

[1] Yi F M, Gao X W, Zhang W Y, Wang W, Xiao W, Yang W B. A study on the application of outrigger to super-tall steel structures. Building Science, 2001, 17(1): 15–20 (in Chinese)

[2] Coull A, Lau W H O. Analysis of multioutrigger-braced structures. Journal of Structural Engineering, 1989, 115(7): 1811-1815

[3] Wu J R, Li Q S. Structural performance of multi-outrigger-braced tall buildings. Structural Design of Tall and Special Buildings, 2003, 12(2): 155-176

[4] Smith B S, Salim I. Parameter study of outrigger-braced tall building structures. Journal of the Structural Division, 1981, 107(10): 2001-2014

[5] Huang Y, Wang Y Q, Chen H, Wen S Q. A study on the effect of horizontal strengthened story to super high-rise steel braced frame. Journal of Chongqing Jianzhu University, 2005, 27(3): 49–56 (in Chinese)

[6] ANSYS User Manual.ANSYS, Inc., 2001

[7] GB 50011-2010. Code for Seismic Design of Buildings. Beijing: Ministry of Housing and Urban-Rural Development of the People’s Republic of China, 2010 (in Chinese)

[8] GB 50009-2001.Load Code for the Design of Building Structures. Beijing: Ministry of Construction of the People’s Republic of China, 2002 (in Chinese)

[9] Chen H, Wang Y Q, Shi Y J, Wen S Q. Random vibration analysis of Wuhan International Securities Mansion subjected to wind loading. In: Proceeding of 2004 Colloquium Institute of Structural Stability and Fatigue China Steel Construction Society (ISSF, CSCS), Taiyuan, 2004, 153-162 (in Chinese)

[10] Clough R W, Penzien J. Dynamics of Structures, 3rd Edition.Berkeley: Computers & Structures, Inc., 1995: 234-235

[11] Wang X C, Shao M. The Basic Principle and Digital Method of Finite Element. Beijing: Tsinghua University Press, 1997: 443-482 (in Chinese)

[12] Fang E H, Qian J R, Ye L P. Tall Building Structural Design. Beijing: China Architecture & Building Press, 2003, 57-71 (in Chinese)

[13] JGJ 99-98.Technical specification for steel structure of tall buildings. Beijing: Ministry of Construction of the People’s Republic of China,1998 (in Chinese)

[14] Guo J W. Seismic Design of Buildings. Beijing: China Architecture & Building Press, 2002, 50-59 (in Chinese)

[15] Shi T H, Wei C J. Decision of reasonable mode number in mode-superposition method. Building Science, 2002, 18(2): 29-31 (in Chinese)

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg