Title: EXPERIMENTAL AND ANALYTICAL VERIFICATION ON DESIGN APPROACHES OF RC TRANSFER GIRDERS HAVING SHORT END SHEAR SPAN
Abstract: 3 SUMMARY The transfer girder which should accommodate the upper wall and lower columns may have very short end shear span between the wall boundary and the face of the lower column. Two available design procedures for this type of transfer girders, conventional and strut-and-tie procedures, are performed, and the details based on these design methods are compared with regard to the dimensions and amount of reinforcements. This paper presents the results of tests and analyses performed on two specimens of transfer girders designed by different design approaches. The conclusions are as follows: (1) The approach of the strut-and-tie method is valid for the type of transfer girders rather than conventional beam approach. (2) Since the upper load was carried over directly to the supporting columns through the stiff concrete strut without any assistance from the adjacent beam up to the point of the yielding of the bottom ties, it is reasonable to model the continuous deep beam as a group of independent simple deep beams up to yielding of bottom tie. (3) The shear capacity of deep transfer girders are mainly governed by the bottom tie yielding forces. The additional shear resistance comes from the continuity with the adjacent beams or walls. Shear and top reinforcements in the continuity region can be designed using the strut-and-tie model for the additional margin of safety regarding strength and ductility. (4) Results simulated from nonlinear 2-dimensional analyses using DIANA showed the behaviors similar to experimental results in the global sense, but could not simulate exactly the strain distribution and detailed crack development.
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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