(1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering，Hohai University，Nanjing， Jiangsu 210098，China；2. Jiangsu Research Center for Geotechnical Engineering Technology， Hohai University，Nanjing，Jiangsu 210098，China)
The purpose of this paper is to figure out the distribution of interfacial shear stress and how the load transfers. Based on the uniform form of shear displacement distribution curve，the formula for calculating the displacement，axial force and side resistance of infinite-length anchor bar was established.The constitutive model of double exponential curve was derived，which is essentially the same as that of Huang Minghua Model. Also，the exponential form of load-displacement curve at the top of anchor bar was deduced. The formula was further modified to apply to the finite-length anchor bar，and thus the modified formula of load and displacement distribution was obtained，by which the constitutive relation of the contact surface of the anchor can be explained with anchorage depth varies. It is noted that the modified formula avoids the limitation of the assumption that the constitutive relation at the contact surface is uniform and thus the modified formula has higher applicability. It was then verified by an engineering example. And based on this method，the whole working course for the force transferring mechanism of the anchor bar was analyzed.
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2017, Vol. 36 
