Earthquakes and Structures

  • 제10권5호
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  • Pages.989-1012
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  • 2016
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Structural response analysis in time and frequency domain considering both ductility and strain rate effects under uniform and multiple-support earthquake excitations

  • Liu, Guohuan (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University) ;
  • Lian, Jijian (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University) ;
  • Liang, Chao (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University) ;
  • Zhao, Mi (College of Architecture and Civil Engineering, Beijing University of Technology)
  • 투고 : 2015.11.01
  • 심사 : 2016.02.23
  • 발행 : 2016.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

The structural dynamic behavior and yield strength considering both ductility and strain rate effects are analyzed in this article. For the single-degree-of-freedom (SDOF) system, the relationship between the relative velocity and the strain rate response is deduced and the strain rate spectrum is presented. The ductility factor can be incorporated into the strain rate spectrum conveniently based on the constant-ductility velocity response spectrum. With the application of strain rate spectrum, it is convenient to consider the ductility and strain rate effects in engineering practice. The modal combination method, i.e., square root of the sum of the squares (SRSS) method, is employed to calculate the maximum strain rate of the elastoplastic multiple-degree-of-freedom (MDOF) system under uniform excitation. Considering the spatially varying ground motions, a new response spectrum method is developed by incorporating the ductility factor and strain rate into the conventional response spectrum method. In order to further analyze the effects of strain rate and ductility on structural dynamic behavior and yield strength, the cantilever beam (one-dimensional) and the triangular element (two-dimensional) are taken as numerical examples to calculate their seismic responses in time domain. Numerical results show that the permanent displacements with and without considering the strain rate effect are significantly different from each other. It is not only necessary in theory but also significant in engineering practice to take the ductility and strain rate effects into consideration.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

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피인용 문헌

  1. Energy Dissipation and Local, Story, and Global Ductility Reduction Factors in Steel Frames under Vibrations Produced by Earthquakes vol.2018, pp.1875-9203, 2018, https://doi.org/10.1155/2018/9713685
  2. Effectiveness of Soil–Structure Interaction and Dynamic Characteristics on Cable-Stayed Bridges Subjected to Multiple Support Excitation vol.18, pp.2, 2018, https://doi.org/10.1007/s13296-018-0069-z
  3. Local, Story, and Global Ductility Evaluation for Complex 2D Steel Buildings: Pushover and Dynamic Analysis vol.9, pp.1, 2019, https://doi.org/10.3390/app9010200
  4. Seismic structural demands and inelastic deformation ratios: a theoretical approach vol.12, pp.4, 2016, https://doi.org/10.12989/eas.2017.12.4.397