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Prediction on static strength for CHS tubular K-joints at elevated temperature

  • Structural Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

This study presents a design method for predicting the static strength of a Circular Hollow Section (CHS) tubular K-joint at elevated temperature. The presented method is obtained based on a parametric study by the authors (He et al., 2015a). In determining the static strength of a tubular K-joint at elevated temperature, a deforming rate criterion is proposed, and it is proved to be much safer and more reasonable for design purposes rather than the conventional definition on that static strength by using 3% of chord ovalisation for the K-joint at ambient temperature. In the presented design method, a strength reduction factor k is proposed, and the static strength of a CHS K-joint at elevated temperature can be obtained simply by multiplying the static strength at ambient temperature with k. The strength reduction factor k is a product of two factors, a revised reduction factor of elastic modulus (λ) and a revised chord stress ratio (k n′, θ ). From the finite element results of overall 57 K-joint models, the accuracy of the presented design method is assessed to be reliable and accurate.

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Authors and Affiliations

  1. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, 610500, PR China

    Yongbo Shao

  2. College of Civil Engineering, Tongji University, Shanghai, 200092, PR China

    Shubin He

  3. Tecnnology Inspection Center, China Petroleum & Chemical Corporation, Dongying, 257062, PR China

    Dongping Yang

Authors
  1. Yongbo Shao
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  2. Shubin He
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  3. Dongping Yang
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Correspondence to Yongbo Shao.

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Shao, Y., He, S. & Yang, D. Prediction on static strength for CHS tubular K-joints at elevated temperature. KSCE J Civ Eng 21, 900–911 (2017). https://doi.org/10.1007/s12205-016-0805-x

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  • DOI: https://doi.org/10.1007/s12205-016-0805-x

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