FEMA 356 a b c and IO LS CP For Concrete Beam (Shear Controlled)
Автор: Mr EngineerO
Загружено: 2023-07-04
Просмотров: 628
In this educational example, we tried to obtain modeling parameters (a , b , c ) and acceptance criteria ( IO , LS , CP ) for a shear controlled concrete beam. In concrete beams, unlike steel beams, the force displacement curve is not symmetrical.Because in concrete beams, the amount of bending rebar at the top and bottom of the section and at the beginning and end of the beam is not the same.This makes the specifications of the plastic Hing for the beginning of the beam to be different from the end of the beam.To obtain the parameters, FEMA 356 was used and the results of ETABS were also used. First, we have to check whether the beam is controlled by bending or shear, and then we calculate the rotations.
#ETABS#PerformanceBasedDesign#PushOver_NonLinear
Timecodes
0:00 - ETABSs
0:42 - Display Concrete Beam Rebar Area
1:06 - Check the information required for the Hing
2:49 - Calculate Capacity Expected Moment (positive and negative)
4:02 - Check Beam If Shear controlled or Flexure Controlled
4:26 - Define New Load Combination 1.1(D+L) and 0.9D
6:22 - Calculate Lower Bound Shear force Vcl
7:22 - Eventually Finding a b c and IO LS CP
8:55 - Computing Rotations θ
9:40 - Drawing Graph of force - displacement
12:50 - Define New Hing Property for Left anf right side of RC Beam
15.40 - Assign Plastic Hings To The Beam
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