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Contents 1

Effects of ground motion orientation on prediction of seismic demands of a single-story RC structure / Deniz B. Kayı ; Beyhan Bayhan ; Gökhan Özdemir 1

Abstract 1

1. Introduction 1

2. Structural models 3

3. Validation of the numerical model 5

4. Selection of strong ground motions 8

5. Rotation of strong ground motions 8

6. Scaling of strong ground motions 8

7. Nonlinear dynamic analysis 9

7.1. Story drift ratio demands 10

7.2. Base shear force demands 13

8. Conclusions 15

References 16

초록보기

This study investigates the influence of strong ground motion orientation on seismic response of a single-story reinforced concrete (RC) structures. For this purpose, three dimensional, single-story, single-bay asymmetric RC structure tested on shake table and its symmetric version are used. The numerical models of the structures in which reinforcement slip deformations taken into account are established according to the modelling technique validated in the “Blind Prediction Contest” conducted at the 15th World Conference on Earthquake Engineering. 30 pairs of near-field ground motion records are selected for bi-directional nonlinear time-history analyses. Horizontal components of ground motions are rotated from 0° to 360° with 10° increments. Selected and rotated ground motion records are scaled to get compatible with the target spectrum. Nonlinear time-history analyses are performed by applying simultaneously the horizontal components of those ground motions to the numerical models. The results for both asymmetric and symmetric structural models revealed that change in the ground motion incidence angle may result almost 4 times larger story drift ratio demands compared to the result obtained by using as-recorded ground motion records. However, when the averages of the maximum story drift ratio demand obtained from all analyses are considered, the change in the demands depending on the ground motion incidence angle remains around 15%.

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기사명 저자명 페이지 원문 목차
Effects of ground motion orientation on prediction of seismic demands of a single-story RC structure Deniz B. Kayı, Beyhan Bayhan, Gökhan Özdemir p. 239-255

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