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In this paper, the current developments on the method of strut-and-tie model are reanalyzed and, then, adjusted for the application to continuous deep beams. Based on concrete strength (normal or high) and the shear span-to-depth ratio, the effectiveness factors of concrete struts are modified. The effectiveness factors for nodal zones are chosen based on the force boundary conditions. The proposed strut-and-tie approach is, then, applied to two different groups of top and bottom loaded continuous deep beams that had been tested experimentally. The obtained results are compared with the experimental results and the findings based on the effectiveness factors of two selected building codes (ACI Code-08 and the UK CIRIA Guide-2). From the comparison, the strut-and-tie method with the proposed modified effectiveness factors gives satisfactory results. [ABSTRACT FROM AUTHOR]

In this paper, the current developments on Strut-and-Tie model are reanalyzed and, then adjusted for the application to simple deep beams. Based on concrete strength (normal or high) and the shear span-to-depth ratio, the effectiveness factors of concrete struts are modified. The effectiveness factors for nodal zones are chosen based on the force boundary conditions. The proposed Strut-and-Tie model approach is then applied to three main groups of simple deep beams tested experimentally. The obtained results are compared with the experimental results and selected building codes (ACI Code-08, Appendix 'A' and the UK CIRIA Guide 2). From the comparison, the Strut-and-Tie method with the proposed modified effectiveness factors gives acceptable results. [ABSTRACT FROM AUTHOR]