A Solution to Small Strain Dynamic Response of Integrated Bolt

 

Guo Zhao

Engineer, School of Civil Engineering, Chongqing University and Key Laboratory of New Technology for Construction of Cities in Mountain Area(Chongqing University), Ministry of Education, Chongqing, China
e-mail: 13320201658@189.cn

Jian-gong Chen

Professor, School of Civil Engineering, Chongqing University and Key Laboratory of New Technology for Construction of Cities in Mountain Area(Chongqing University), Ministry of Education, Chongqing, China
e-mail: cjg77928@126.com

 

 ABSTRACT

The strain dynamic response model of integrated bolt system under impulse force is established. With Laplace transforms, the analytical expressions of displacement response function and velocity response function in frequency domain at the top of the bolt are derived for the bolt anchorage system subjected to an semi-sine impulse force at its top. Then a semi-analytical solution of the velocity response in time-domain is given by using method of inverse Fourier transform. The influences of different dynamic parameters such as damp factor, rigidity factor of the anchor bar's side are analyzed. The research has important theoretical value that it can provide more reasonable explanation to the measurement of bolt low strain dynamic response and it also has an important significance on the practice of anchoring quality testing.

Keywords: Bolt; Dynamic Response; Semi-Analytical Solution

Get the entire paper (pdf)    Go back to the TOC