Story Damage Identification of Irregular Buildings Based on Earthquake Records

In this paper, a story damage index was developed to evaluate the damage condition of a torsionally coupled building based on its dominant modal frequencies and mode shapes. This index has an analytical formula with a calculated value ranging from 0 (undamaged) to 1.0 (collapsed) to indicate the reduction of story lateral stiffness. The involved computation is simple once the modal parameters of any three modes are obtained through system identification techniques from few floor acceleration measurements. The damage region within a story can also be identified through tracking the change of eccentricity of center of rigidity. This index was verified by numerical simulations and a data analysis of the ASCE benchmark model. In addition, it was also applied to the damage assessment of a four-story reinforced concrete building in Taiwan, which experienced severe damage during the 2006 Taitung Beinan earthquake (M = 6.2). The results agree fairly well with the visual inspection and show the applicability of the proposed damage assessment technique.

[1]  Anil K. Chopra,et al.  Lateral-Torsional Coupling in Earthquake Response of Frame Buildings , 1989 .

[2]  Li Cheng,et al.  Development in vibration-based structural damage detection technique , 2007 .

[3]  Randall J. Allemang,et al.  A Correlation Coefficient for Modal Vector Analysis , 1982 .

[4]  Hsin Wei Wu,et al.  On-line building damage assessment based on earthquake records , 2005, Smart Materials and Structures.

[5]  José Luis Vital de Brito,et al.  Damage identification in continuous beams and frame structures using the Residual Error Method in the Movement Equation , 2004 .

[6]  Norris Stubbs,et al.  Damage identification in beam-type structures: frequency-based method vs mode-shape-based method , 2003 .

[7]  Guido De Roeck,et al.  The state‐of‐the‐art of damage detection by vibration monitoring: the SIMCES experience , 2003 .

[8]  A. M. Chandler,et al.  Torsional coupling effects in the earthquake response of asymmetric buildings , 1986 .

[9]  F. J. Soeiro,et al.  Structural damage detection based on static and modal analysis , 1989 .

[10]  Antonina Pirrotta,et al.  Low stiffness variation in structural systems: Identification and localization , 2008 .

[11]  L. G. Jaeger,et al.  Dynamics of structures , 1990 .

[12]  Keith D. Hjelmstad,et al.  Damage detection and assessment of structures from static response , 1997 .

[13]  Charles R. Farrar,et al.  Comparative study of damage identification algorithms applied to a bridge: II. Numerical study , 1998 .

[14]  Wu Di,et al.  Eigen-parameter decomposition of element matrices for structural damage detection , 2007 .

[15]  K Meskouris,et al.  Correlation study between seismic acceleration parameters and damage indices of structures , 2001 .

[16]  A. K. Pandey,et al.  Damage Detection in Structures Using Changes in Flexibility , 1994 .

[17]  Achintya Haldar,et al.  A novel health assessment technique with minimum information , 2008 .

[18]  Anil K. Chopra,et al.  Effects of Torsional Coupling on Earthquake Forces in Buildings , 1977 .

[19]  Herbert Martins Gomes,et al.  Some comparisons for damage detection on structures using genetic algorithms and modal sensitivity method , 2008 .

[20]  A. Ang,et al.  Mechanistic Seismic Damage Model for Reinforced Concrete , 1985 .

[21]  J. Juang.  System Realization Using Information Matrix , 1997 .

[22]  Georgia E. Thermou,et al.  Assessment indices for the seismic vulnerability of existing R.C. buildings , 2011 .

[23]  David A. Nix,et al.  Vibration–based structural damage identification , 2001, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[24]  Chi-Chang Lin,et al.  A story damage index of seismically-excited buildings based on modal frequency and mode shape , 2007 .

[25]  Zhao-Dong Xu,et al.  Energy damage detection strategy based on acceleration responses for long-span bridge structures , 2007 .

[26]  Hong Li-Ling,et al.  Identification and variation of story lateral stiffness in buildings , 2009 .

[27]  Anil K. Chopra,et al.  Torsional Coupling and Earthquake Response of Simple Elastic and Inelastic Systems , 1981 .

[28]  Arun Kumar Pandey,et al.  Damage detection from changes in curvature mode shapes , 1991 .

[29]  Young-Soo Chun,et al.  Structural damage assessment of building structures using dynamic experimental data , 2004 .

[30]  James L. Beck,et al.  Bayesian Analysis of the Phase II IASC–ASCE Structural Health Monitoring Experimental Benchmark Data , 2004 .

[31]  Juan Carlos de la Llera,et al.  Evaluation of Code Accidental‐Torsion Provisions from Building Records , 1994 .

[32]  Chi-Chang Lin,et al.  Dynamic Parameter Identification for Irregular Buildings considering Soil-Structure Interaction Effects , 2008 .

[33]  Chi-Chang Lin,et al.  System identification of torsionally coupled buildings , 2000 .

[34]  O. S. Salawu.  Detection of structural damage through changes in frequency: a review , 1997 .

[35]  J. Vantomme,et al.  Damage assessment in reinforced concrete beams using eigenfrequencies and mode shape derivatives , 2002 .

[36]  J. M. Ueng,et al.  Parametric identification of asymmetric buildings from earthquake response records , 2005 .

[37]  Anil K. Chopra,et al.  Elastic earthquake analysis of torsionally coupled multistorey buildings , 1977 .

[38]  Sankaran Mahadevan,et al.  Bayesian wavelet methodology for structural damage detection , 2008 .