SHEAR BEHAVIOR OF JOINTS IN PRECAST CONCRETE SEGMENTAL BRIDGES

Tests were made to study the shear behavior and strength of joints in precast concrete segmental bridges. Tests included models of flat and keyed joints with and without epoxy (dry joints). Experimental model of keyed joints included a single key, representing one of a series of multiple keys used in precast segmental bridge joints. These tests provide quantitative data and fundamental behavioral understanding on deformation, cracking, and fracture of the precast concrete bridge joints. The test results are analyzed using a linear regression method, and formulas are proposed for evaluating the ultimate shear strength of the joints in terms of the normal (confining) stress, epoxy thickness, and concrete strength. The formulas provide a rational estimate of the load level at which shear-off of the shear keys, in either dry or epoxied joints, would occur. Conclusions drawn from the results are presented.

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  • Accession Number: 00602953
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Dec 31 1990 12:00AM