Existing deep reinforced concrete (RC) coupling beams with low shear span ratios and conventionally reinforced shear stirrups tend to fail in a brittle manner with limited ductility and deformability under reversed cyclic loading. Retrofitted coupling beams with laterally restrained steel plates (LRSP) have been demonstrated experimentally and numerically in the previous studies to be a viable method for improving the structural performance of existing deep coupling beams. In this paper, an original seismic design procedure of LRSP coupling beams is proposed and it consists of five main parts, which are:(1) estimation of the ultimate rotation of the original coupling beams; (2) estimation of axial force; (3) rotation capacity of bolt group; (4) rotation capacity of steel plate; and (5) rotation compatibility of retrofitted coupling beam.
Seismic Design Guidelines of Retrofitted Deep Concrete Coupling Beams with Laterally Restrained Steel Plate
10th Asia Pacific Transportation Development Conference ; 2014 ; Beijing, China
2014-05-05
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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