The Effect Of Longitudinal Reinforcement End Anchorage Angle And Development Length From The Support In Beam Capacity

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In reinforced concrete members, reinforcement must be bonded or anchored to thernconcrete. Reinforcement development length is provided in the regions of maximumrnstress to zero stress. However, at the support of simply supported beam, the bendingrnstress is zero, the researchers recommend that the longitudinal reinforcement shouldrndevelop farther from the support to resist pullout of bars. The research focuses on therninvestigation of the effect of longitudinal reinforcement end anchorage angle andrndevelopment length from the support on simply supported beam capacity. Therninvestigation was conducted on three shear critical and three flexure critical beams usingrnexperiment and finite element analysis software. The experimental and the finite elementrnanalysis result gives comparable result for each beam. The result shows that therndevelopment of a longitudinal reinforcement bar farther from the center of support andrnuse of 135rnorn end anchorage angle has no significant effect on flexure critical beamsrncapacity and crack pattern formation. But, use of development length and different endrnanchorage angles on longitudinal reinforcement bars have a significant effect on thernultimate load capacity and crack pattern formation on the shear critical beams. Thernultimate capacities of beams having longitudinal reinforcement 135rnorn or 90rn end anchorage andrnbeams without development length from the support reduced by 11.75% and 29.05%rnfrom the ultimate capacities of beams having 90rnornend anchorage respectively. Also, shearrncritical beams give different crack pattern formation due to the variation of reinforcementrnbar end anchorage angle and development length.

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The Effect Of Longitudinal Reinforcement End Anchorage Angle And Development Length From The Support In Beam Capacity

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