Soil Structure Interaction Effects on Hysteretic Energy Demand for Stiffness Degrading Systems Built on Flexible Soil Sites

Document Type: Regular Paper

Authors

1 Department of Civil Engineering, University of Mazandaran

2 Department of Civil, Water & Environmental Engineering, Shahid Beheshti University, Tehran, Iran

3 Department of Civil Engineering, University of Mazandaran, Babolsar, Iran

Abstract

This paper aims to study the influence of soil-structure interaction on plastic energy demand spectra directly derived from the energy-balance equations of soil-shallow-foundation structure with respect to an ensemble of far-field strong ground motions obtained from Pacific Earthquake Engineering Research (PEER) database and recorded on alluvium soil. The superstructure is modeled as a single-degree-of-freedom (SDOF) oscillator with Modified Clough stiffness degrading model resting on flexible soil. The soil beneath the superstructure is considered as a homogeneous elastic half space and is modeled through the concept of Cone shallow foundation Models. A parametric study is carried out for 2400 soil-structure systems with various aspect ratios of the building as well as non-dimensional frequency as a representative of the structure-to-soil stiffness ratio having a wide range of fundamental fixed-base period and target ductility demand values under a family of 19 earthquake ground motions. Results show that generally for the structure located on softer soils severe dissipated energy drop will be observed with respect to the corresponding fixed-base system. The only exception is for the case of short period slender buildings in which the hysteretic energy demand of soil-structure systems could be up to 70% larger than that of their fixed-base counterparts. Moreover, dissipated energy spectra are much more sensitive to the variation of target ductility especially for the case of drastic SSI effect.

Keywords

Main Subjects


[1] ASCE/SEI (2006). Standard 41-06 Seismic Rehabilitation of Existing Buildings. American Society of Civil Engineers, Reston, Virginia, USA.

[2] urocode 8: (2005). Design of structures for earthquake resistance.

[3] Code TE. (2007). Specification for structures to be built in disaster areas, Ministry of Public Works and Settlement Government of Republic of Turkey.

[4] Park Y-J, Ang A-S, Wen Y-K. (1984). Seismic damage analysis and damage-limiting design of RC buildings. University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.,

[5] Park Y-J, Ang AH-S. (1985). Mechanistic seismic damage model for reinforced concrete, Journal of structural engineering, 111  722-39.

[6] Fajfar P. (1992). Equivalent ductility factors, taking into account low‐cycle fatigue, Earthquake Engineering & Structural Dynamics, 21  837-48.

[7] Fajfar P, Vidic T. (1994). Consistent inelastic design spectra: hysteretic and input energy, Earthquake Engineering & Structural Dynamics, 23  523-37.

[8] Rodriguez M. (1994). A measure of the capacity of earthquake ground motions to damage structures, Earthquake engineering & structural dynamics, 23  627-43.

[9] Teran-Gilmore A. (1996). Performance-based earthquake-resistant design of framed buildings using energy concepts: University of California, Berkeley;

[10] Manfredi G. (2001). Evaluation of seismic energy demand, Earthquake Engineering & Structural Dynamics, 30  485-99.

[11] Riddell R, Garcia J. (2002). Hysteretic energy spectrum and earthquake damage, 7th US NCEE (Boston).

[12] Kuwamura H, Galambos TV. (1989). Earthquake load for structural reliability, Journal of Structural Engineering, 115  1446-62.

[13] Housner GW, (1959). editor Behavior of structures during earthquakes. Selected Earthquake Engineering Papers of George W Housner: ASCE.

[14] Zahrah TF, Hall WJ. (1984). Earthquake energy absorption in SDOF structures, Journal of structural Engineering, 110  1757-72.

[15] Akiyama H. (1985). Earthquake-resistant limit-state design for buildings: Univ of Tokyo Pr.

[16] Bertero V, Uang C. (1988). Implications of recorded earthquake ground motions on seismic design of building structures. Research Report (UCB/EERC-88/13).

[17] Decanini LD, Mollaioli F. (1998). Formulation of elastic earthquake input energy spectra, Earthquake engineering & structural dynamics, 27  1503-22.

[18] Decanini LD, Mollaioli F. (2001). An energy-based methodology for the assessment of seismic demand, Soil Dynamics and Earthquake Engineering, 21  113-37.

[19] Leelataviwat S, Saewon W, Goel SC. (2009). Application of energy balance concept in seismic evaluation of structures, Journal of structural engineering, 135  113-21.

[20] Dindar AA, Yalçin C, Yüksel E, Özkaynak H, Büyüköztürk O. (2015). Development of Earthquake Energy Demand Spectra, Earthquake Spectra, 31  1667-89.

[21] Benavent-Climent A, López-Almansa F, Bravo-González DA. (2010). Design energy input spectra for moderate-to-high seismicity regions based on Colombian earthquakes, Soil dynamics and earthquake engineering, 30  1129-48.

[22] Sadeghi K. (2011). Energy based structural damage index based on nonlinear numerical simulation of structures subjected to oriented lateral cyclic loading, International Journal of Civil Engineering, 9 155-64.

[23] Chopra AK, Gutierrez JA. (1974). Earthquake response analysis of multistorey buildings including foundation interaction, Earthquake Engineering & Structural Dynamics, 3  65-77.

[24] Veletsos AS. (1977). Dynamics of structure-foundation systems, Structural and geotechnical mechanics, 333-61.

[25] Wolf JP. (1985). Dynamic soil-structure interaction: Prentice Hall int.

[26] Ghannad M, Jahankhah H. (2007). Site-dependent strength reduction factors for soil-structure systems, Soil Dynamics and Earthquake Engineering, 27  99-110.

[27] Ganjavi B, Hao H. (2012). A parametric study on the evaluation of ductility demand distribution in multi-degree-of-freedom systems considering soil–structure interaction effects, Engineering Structures, 43  88-104.

[28] Tang Y, Zhang J. (2011). Probabilistic seismic demand analysis of a slender RC shear wall considering soil–structure interaction effects, Engineering Structures, 33  218-29.

[29] Raychowdhury P. (2011). Seismic response of low-rise steel moment-resisting frame (SMRF) buildings incorporating nonlinear soil–structure interaction (SSI), Engineering Structures, 33 958-67.

[30] Aviles J, Pérez-Rocha LE. (2011). Use of global ductility for design of structure–foundation systems, Soil Dynamics and Earthquake Engineering, 31 1018-26.

[31] Khoshnoudian F, Ahmadi E. (2013). Effects of pulse period of near‐field ground motions on the seismic demands of soil–MDOF structure systems using mathematical pulse models, Earthquake Engineering & Structural Dynamics, 42  1565-82.

[32] Ganjavi B, Hajirasouliha I, Bolourchi A. (2016). Optimum lateral load distribution for seismic design of nonlinear shear-buildings considering soil-structure interaction, Soil Dynamics and Earthquake Engineering, 88  356-68.

[33] Ganjavi B, Hao H. (2014). Strength reduction factor for MDOF soil–structure systems, The Structural Design of Tall and Special Buildings, 23  161-80.

[34] Bielak J. (1978). Dynamic response of non‐linear building‐foundation systems, Earthquake Engineering & Structural Dynamics, 6  17-30.

[35] Nakhaei M, Ghannad MA. (2008). The effect of soil–structure interaction on damage index of buildings, Engineering Structures, 30  1491-9.

[36] Nakhaei M, Ghannad M. (2006). The effect of soil-structure interaction on hysteretic energy demand of buildings, Structural Engineering and Mechanics, 24  641-5.

[37] Clough RW. (1966). Effect of stiffness degradation on earthquake ductility requirements: Structural Engineering Laboratory, University of California,

[38] Mahin SA, Bertero VV. (1976). Nonlinear seismic response of a coupled wall system, Journal of the Structural Division, 102  1759-80.

[39] Wolf JP. (1994). Foundation vibration analysis using simple physical models: Pearson Education.

[40] Meek JW, Wolf JP. (1993). Why cone models can represent the elastic half‐space, Earthquake engineering & structural dynamics, 22  759-71.

[41] GHANNAD MA, 福和伸夫, 西阪理永. 11(1998). A STUDY ON THE FREQUENCY AND DAMPING OF SOIL-STRUCTURE SYSTEMS USING A SIMPLIFIED MODEL, 構造工学論文集 B, 44  85-93.

[42] Ganjavi B, Hao H, Hajirasouliha I. (2016). Influence of Higher Modes on Strength and Ductility Demands of Soil–Structure Systems, Journal of Earthquake and Tsunami, 1650006.


Volume 6, Issue 2 - Serial Number 12
Summer and Autumn 2018
Pages 82-98
  • Receive Date: 07 July 2017
  • Revise Date: 25 July 2017
  • Accept Date: 05 September 2017