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Online hybrid test using a finite element program and an explicit integration scheme

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Abstract

A new online hybrid test system combined with substructuring techniques and incorporating finite element methods is developed. In the proposed system, numerical substructure analysis is conducted by ABAQUS/Explicit. An ABAQUS user subroutine is used as the interface between the main control program and ABAQUS to impose the target displacements and determine the reaction forces. No iteration is needed in this system, making it suitable for physical testing. As the approach also avoids the need to modify source code, it will be appealing to a number of real engineering applications. The proposed system adopts a separated-model framework, operator-splitting integration scheme, and data exchange through a socket mechanism. The earthquake responses of a simple steel moment-resisting frame are simulated, and the results obtained from the new system are compared to those obtained from the conventional analysis. It is found that the results obtained from the new system are accurate, demonstrating the applicability and efficiency of the proposed approach. The optimal test parameters are also studied to gain the most accurate results in the minimum time.

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Authors and Affiliations

  1. Department of Civil Engineering, Tsinghua University, Beijing, 100084, China

    Alexandre Lam & KaiLai Deng

  2. Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing, 100084, China

    Peng Pan

Authors
  1. Alexandre Lam
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  2. Peng Pan
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  3. KaiLai Deng
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Correspondence to Peng Pan.

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Lam, A., Pan, P. & Deng, K. Online hybrid test using a finite element program and an explicit integration scheme. Sci. China Technol. Sci. 58, 163–173 (2015). https://doi.org/10.1007/s11431-014-5734-7

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  • DOI: https://doi.org/10.1007/s11431-014-5734-7

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