Correlation Study between Seismic Intensity Measures and Nonlinear Response of Arch Dam via Endurance Time Analysis
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pISSN 1226-7988, eISSN 1976-3808 www.springer.com/12205
DOI 10.1007/s12205-020-0548-6
Structural Engineering
Correlation Study between Seismic Intensity Measures and Nonlinear Response of Arch Dam via Endurance Time Analysis Chao Lianga, Jianyun Chenb, Qiang Xua, and Jing Lic a
Institute of Earthquake Engineering, Dalian University of Technology, Dalian 116024, China State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China c Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China b
ARTICLE HISTORY
ABSTRACT
Received 26 March 2020 Accepted 2 August 2020 Published Online 26 October 2020
Predicting the structural response efficiently and quickly is a major focus in civil engineering. For concrete dams, due to the structure’s complexity, it is difficult to obtain the structural performance timely through a large number of calculations. In this paper, the relationship between structural responses and seismic intensity mesures (IMs) is established under the framework of endurance time analysis method (ETAM) with its good accuracy and high efficiency. Baihetan arch dam is selected as a case study, and the dam-reservoir-foundation system is excited under fourteen sets of endurance time acceleration functions (ETAFs) which are generated through the response spectra of ground motion records. The results show that, compared with displacement-dependent damage indices (DIs), damage-dependent DIs can better reflect damage characteristics of the arch dam under different damage levels. Among the ETA-related IMs, the combined spectral acceleration is the most practical and proficient, followed by acceleration spectral intensity (ASI) and effective peak acceleration (EPA). For high arch dam, the influence of the higher order modes should be fully taken into account when establishing the correlation between the structural response and the IMs. The sufficiency of IMs based on structural response should also be fully demonstrated.
KEYWORDS Endurance time analysis method Seismic intensity measures Nonlinear response of high arch dam Correlation Sufficiency
1. Introduction Predicting the structural response given certain earthquake condition has always received great attention in recent years. This is not only very important in performance-based seismic engineering (PBEE) (Alavi and Krawinkler, 2001), but also very crucial in structural vulnerability assessment (Hariri-Ardebili and Saouma, 2016a). In order to establish the perfect relationship between structural response and intensity measures (IMs) successfully, it is very important to identify the optimal IM which sufficiently correlates with structural response. Many IMs have been used to predict the structural damage level effectively. These IMs can be divided into two categories: structure-specific IMs and non-structure-specific IMs (Kostinakis et al., 2018). An optimal seismic intensity parameter should satisfy practicality, efficiency, sufficiency and scaling robustness (Luco and A
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