Perpustakaan Digital ITB

This research aimed to study and evaluate the behavior of one kind of discontinuum rockmass which is laminated block, the behavior was represented in Young’s modulus. And to develop an equivalent continuum models using physical and numerical modeling of vertically and horizontally laminated blocks. Vertically and horizontally laminated physical concrete blocks, with the side smaller blocks are of the same properties, and the middle smaller block of different properties were undergone UCS test, the middle and side components of the laminated blocks were alternated. Formulas which are used to calculate the equivalent stiffness of groups of combined springs were adapted and adjusted to estimate the equivalent Young’s modulus and Poisson’s ratio of the laminated blocks; which were used as input parameters in the numerical modeling. The calculation of the equivalent axial properties was based on Young’s modulus and Poisson’s ratio of the materials of the smaller blocks in the laminated block, and on their thickness. FLAC3D (Fast Lagrangian Analysis of Continua in 3 Dimensions) version 3.0 which is based on Finite Difference method was used to simulate the UCS test of the laminated blocks and then to evaluate their axial strain and Young’s Modulus E. FLAC3D proved to do reliable simulation of the UCS test. That was proved from the results of the axial strain and Young’s modulus of core samples which were in good accordance with the results from the laboratory. The results of the axial strain and Young’s modulus of the laminated blocks from FLAC3D were quite satisfying compared to the laboratory results. Future work would study and evaluate the behavior of laminated blocks in three axis, and consider multi lamination sets, different orientations of lamination sets, and different thicknesses of the constituents. So it could facilitate developing general formula for evaluation of the laminated bodies, and validating it to large scale.