about the section Aggregator.

[borjiajia]

I have built a simply supported beam under cyclic loads. I considered shear effect into the section. But the results were messy.
Is there anything wrong with my codes?

Here is the part of my codes:
#----------------------------------------------------------------------------------------------------------------------
section fiberSec 17 {
patch quadr $IDconcCoreC70 10 1 -0.085 0.02 -0.085 -0.02 0.085 -0.02 0.085 0.02;
patch quadr $IDconcCoverC70 1 10 -0.125 0.05 -0.085 0.02 0.085 0.02 0.125 0.05;#左侧那块
patch quadr $IDconcCoverC70 1 10 -0.085 -0.02 -0.125 -0.05 0.125 -0.05 0.085 -0.02;#右侧那块
patch quadr $IDconcCoverC70 1 2 -0.125 0.05 -0.125 -0.05 -0.085 -0.02 -0.085 0.02;#下侧那块
patch quadr $IDconcCoverC70 1 2 0.085 0.02 0.085 -0.02 0.125 -0.05 0.125 0.05;#上侧那块
layer straight $IDSteelHRB400 2 $barArea12 0.085 0.02 0.085 -0.02;
layer straight $IDSteelHRB400 2 $barArea12 -0.085 0.02 -0.085 -0.02;
};

set IDBeamTransf 1; # all beams
geomTransf Linear $IDBeamTransf

set A [expr $HBeam*$BBeam]
set G3 [expr 1.48e4*$MP];
set GA [expr $A*$G3]
uniaxialMaterial Elastic 28 $GA

section Aggregator 27 28 Vy -section 17

set np 5;
element nonlinearBeamColumn 11 1 3 5 27 $IDBeamTransf;
element nonlinearBeamColumn 12 3 5 5 27 $IDBeamTransf;
#--------------------------------------------------------------------------------------------------------------------------

[vesna]

the procedure is correct. I do not know about the numbers.