Abstract
A new technique to modify the lattice model is described by the authors. This new method significantly depends on the calculation of the minimum total potential energy of the structure starting from the elastic stage up to the failure stage inside each increment of the calculation. Adoption of the minimum total potential energy for the structure is studied. Angle of inclination of the diagonals and the appropriate discretization method for the truss member are very important parameters affecting the results of the lattice model and are studied in this paper. The applicability of the Modified Lattice Model is examined by proposed shear strength equations and existing experimental data.
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