自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 17    No. 4    August 2010

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Effects of temperature change on elastic behavior of steel beams with semi-rigid connections
CAI Jian-guo(蔡建国)1, 2, FENG Jian(冯健)1, 2, HAN Yun-long(韩运龙)1, 2

1. Key Laboratory of Concrete and Prestressed Concrete Structures, Ministry of Education,
Southeast University, Nanjing 210096, China;
2. Engineering Research Center for Prestress of Jiangsu Province, Southeast University, Nanjing 210096, China

Abstract:Based on the nonlinear displacement-strain relationship, the virtual work principle method was used to establish the nonlinear equilibrium equations of steel beams with semi-rigid connections under vertical uniform loads and temperature change. Considering the non-uniform temperature distribution across the thickness of beams, the formulas for stresses and vertical displacements were presented. On the basis of a flowchart for analysis of the numerical example, the effect of temperature change on the elastic behavior of steel beams was investigated. It is found that the maximal stress is mainly influenced by axial temperature change, and the maximal vertical displacement is principally affected by temperature gradients. And the effect of temperature gradients on the maximal vertical displacement decreases with the increase of rotational stiffness of joints. Both the maximal stress and vertical displacement decrease with the increase of rotational stiffness of joints. It can be concluded that the effects of temperature changes and rotational stiffness of joints on the elastic behavior of steel beams are significant. However, the influence of rotational stiffness becomes smaller when the rotational stiffness is larger.

 

Key words: steel beams; semi-rigid connections; stress; displacement; stiffness; elastic behavior; temperature change; virtual work principle

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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