Authors
Abstract
This investigation examines experimentally and statistically the behavior
and ultimate strength of L-shape reinforced high strength concrete beams
under combined bending and shear. The experimental investigation consists of
casting and testing of nine beams which were tested under bending and shear.
The effect of compressive strength, longitudinal reinforcement on the load carry
capacity and the effect of transverse reinforcement on the shear strength is
studied. An increase in compressive strength by (65.56%) causes an increase in
load carrying capacity and shear strength at cracking load by (21.47% and
162.9%) respectively. An increase in longitudinal reinforcement ratio for
bending by (153.8%) caused an increase in load carrying capacity by (46.37%)
when the longitudinal reinforcement ratio is kept constant, an increase in
transverse reinforcement index by(59.25% %) causes an increase in shear
strength at ultimate load by (6.55 %).
By using multiple nonlinear stepwise regression method, based on data in
this research and from other literature; equations were proposed for predicting
shear strength at cracking and ultimate loads. These proposed equations show
good agreement and they are conservative when compared with equations given
by Codes of practice.
Keywords
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