| Summary: | 碩士 === 國立臺灣大學 === 土木工程學系 === 85 === ABSTRACTA Study on Constitutive Model of Rock Joints A two
dimensional constitutive model for rock joint behaviour from the
view point of the micro-mechanics is proposed first. The
undulation of joint profile is modeled by joint elements. The
mechanical behaviour between two corresponding joint elements
are simulated by the interface element that is connected with
normal and shear stiffness spring. The model considers force
equilibrium besides moment equilibrium of joint profile. The
combined failure of upper and lower profile is considered too.
At last, consider contribution of any two dimensional joint
profile to the mechanical behaviour of three dimensional joint
profile. The three dimensional joint behaviour is evaluated by
means of several representative profiles. The two dimensional
constitutive model expands into quasi - three dimensional
constitutive model. It is shown that the three dimensional joint
behaviour -- closure, shear, dilatant, failure modes and
strength, can be analyzed and predicted. To study the effect of
deformation of rock material, finite element program ABAQUS is
used to analyze the behaviour of regular joint under shearing.
From stress distribution in rock material and on interface
elements. A discussion of failure modes and the reasonability of
the constitutive model is made.
|
|---|
