›› 2006, Vol. 27 ›› Issue (S1): 855-859.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Theoretical and numerical analysis of bolt pull-out test

HE Ruo-lan1, 2，ZHANG Ping3，LIU Bao-chen2   

  1. 1. School of Bridge and Structure Engineering, Changsha University of Science and Technology, Changsha 410076, China; 2. School of Civil and Architectural Engineering, Central South University, Changsha 410075, China; 3. College of Civil Engineering, Hunan University, Changsha 410082, China
  • Received:2006-07-10 Published:2006-12-15

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Abstract: Based on the pull-out test on bolts in-situ, the test data are analyzed and the difference of shear stress distribution along the bolt is discovered between the usual simplified assumption and the actual condition. In usual analysis, the shear stress along the bolt is assumed even distribution, but the real result is negative exponential distribution under pull-out condition. Considering the working mechanism and damage process of cohesion strength, a theoretical model for the pull-out bolt is rebuilt. In this model, the interface shear strength and uncoupling length parameter can be easily deduced from the ultimate load measured from pull-out test. Furthermore, a numerical model including a friction-contact interface element which can simulate the complex mechanical properties of the interface is introduced; and the mechanical response of bolt under pull-out load is analyzed. Comparing the calculation result with the field test, the reliability and precision of the theoretical model and numerical analysis are verified.

Key words: bolt, pull-out test, interface cohesion strength, theoretical model, numerical analysis

CLC Number: 

  • TB 301
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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