层状岩体多节理本构模型与试验验证

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Abstract Based on the composite material model of layered rockmass considering a group of rock joints，a multi-joint constitutive model of layered rockmass considering characteristics of multi-group structural plane is proposed according to the mechanical characteristics of joint planes and rock matrix；and the model can be used to describe the anisotropic characteristics of rock strength and deformation，as well as strain hardening-softening characteristics. Then，the proposed model has been successfully established and embedded to fast Lagrangian analysis of continua in 3 dimensions(FLAC3D) by using programming language VC++，realizing its nonlinear numerical calculation. Furthermore，using the combination method of the proposed constitutive model and three-dimensional joint network model，an analysis method of synthetic rockmass model(SRMM) based on the theory of continuum mechanics is initially put forward. Based on the proposed constitutive model and SRMM above，a three-dimensional synthetic rockmass computational model for true triaixal field test is established. The comparison between field tests and numerical simulation results proves that the proposed constitutive model is suitable for the description of the above characteristics of multi-joint rock masses.

Key words： rock mechanics layered rockmass multi-joint constitutive model synthetic rockmass model numerical simulation experimental verification

Received: 16 April 2012

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http://www.rockmech.org/EN/Y2012/V31/I8/1627

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