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XIA Gui-yun, LI Chuan-xi, ZENG Qing-yuan, YU Mao-hong. BUCKLING ANALYSIS OF FRAME CONSIDERING SHEAR DEFORMATION EFFECT[J]. Engineering Mechanics, 2009, 26(3): 99-105.
Citation: XIA Gui-yun, LI Chuan-xi, ZENG Qing-yuan, YU Mao-hong. BUCKLING ANALYSIS OF FRAME CONSIDERING SHEAR DEFORMATION EFFECT[J]. Engineering Mechanics, 2009, 26(3): 99-105.
shu

BUCKLING ANALYSIS OF FRAME CONSIDERING SHEAR DEFORMATION EFFECT

  • (1. School of Civil and Architectural Engineering, Changsha University of Science and Technology, Changsha, Hunan 410076, China; 2. School of Civil and Architectural Engineering, Central South University, Changsha, Hunan 410075, China; 3. School of Aeronautics and Astronautics, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China)

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  • Received Date: December 31, 1899
  • Revised Date: December 31, 1899
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  • Based on Timoshenko theory of deep beam, analytical solution and moment-slope function were presented. Using the displacement method, buckling stabilities of single-story, single-bay and multi-story, multi-bay frames were analyzed, and transcend equations about effective length factors were derived. The critical load ratios corresponding to different shear-flexural ratios were computed. Results show that shear deformation affects the effective length factor of non-sway frames much more significant than that of sway frames. The larger the shear-flexural ratio, the less the shear deformation effects. When the shear-flexural ratio is greater than 30, the influence of shear deformation is less than 5%. Shear deformation effect makes the critical load lower than code expected. Current code without considering the shear deformation effect is not safe.
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