الفهرس 
Behavior of rc members subjected to shear with background to provisions of the new edition of ECP 203
ContentsOnly 14 pages are availabe for public view
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Abstract
The objectives of this thesis are to present the background and evaluate the modifications to the shear design procedure that have been implemented in the new ECP 203 code for members subjected to static and dynamic loads (cyclic). These modifications would overcome realized difficulties with using current ECP 203 design code. The procedure and implied basis for the new ECP 203 shear design approach are examined and their accurses are assessed using the results of numerous experimental database. The study discusses the shear behavior of reinforced concrete shear walls and moment resisting frames under cyclic loads with particular interest in the behavior of plastic hinge region. An important modification of the new ECP 203 is its utilization of the concrete contribution to shear strength inside plastic hinge region, where sufficient compressive stresses exist. The new ECP 203 shear design provisions included: The shear strength provided by uncracked concrete is modified to (0.16 ); After Cracking, concrete shear strength is reduced to 75% of its uncracked value (0.12 ); The concrete contribution to shear strength is modified to be (0.16) in the critical region of shear walls and moment resisting frames when the axial compression force is greater than or equal to (0.1 Ag. fcu). The knowledge gained in this study explains the merits of these modifications for the new ECP 203 code