Global Damage Indices and Nonlinear Structural Response

by Masamitsu Miyamura, Kajima Corp, Japan,
Katsuhisa Kanda, Kajima Corp, Japan,
Kenichi Kato, Kajima Corp, Japan,
Edmondo DiPasquale, Kajima Corp, Japan,
Santiago Rodriguez-G?mez, Kajima Corp, Japan,
Ahmet S. Cakmak, Kajima Corp, Japan,



Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract:

Damage indices based on equivalent linear parameters have been proposed for the analysis of global seismic damage. The analysis of shaking table experiments and strong motion records has shown that these parameters can successfully identify limit states for reinforced concrete structures. In this paper the compatibility between global damage detection procedures based on equivalent linear models and nonlinear structural analysis is evaluated. Earthquake-like ground motion is used as input to a structure modeled as an assemblage of nonlinear shear beam elements. Nonlinear dynamic analysis is used to simulate the structure's response. Records of the input motion and of the response are used to compute the damage indices. The assessment of damage provided by the parameter based model is compared with the evaluation of the structure's performances as it is conducted at the design level. In particular, different definitions of the serviceability limit state are compared.

Subject Headings: Structural analysis | Reinforced concrete | Ground motion | Concrete structures | Structure reinforcement | Earthquake resistant structures | Structural response

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