The structure overturning moment control is the control when the sum of overturning moments and the preceding total moment total is greater than 0.5.

in the x direction

∑Mx devirici = ∑ (Fx and H i )

∑Mx koruyucu = ∑w i d y

in the y direction

∑Mydevirici = ∑(Fyi Hi)

∑Mykoruyucu = ∑wi dx

For each earthquake direction:

ΣM overturning / ΣM protector > 0.5 structure stall torque control is provided.

ΣM overturning / ΣM protective ≤ 0.5 structure stall torque control is not provided.


The building overturning moment control will be manually controlled for the system whose information is given below for both directions.

Building floor heights:

Ground floor → 300 cm, H i = 300 cm

1st floor → 300 cm, H i = 300 + 300 = 600 cm

 

 

Momet arm will take according to the lower left corner of the structure. (S01 lower left corner of column)

Since the building loads and geometry are symmetrical, the center of mass is the same as the geometric center of gravity. The distance information of the intersection of the line drawn with the cross is shown in the screenshot above.

dy = 215 cm

dx = 317.5 cm

Building Weight Calculation and earthquake forces will be read from the floor parameters dialog.

Verification of x-direction protective moments

1st floor building weight G = 32.72 tf, Q = 4.312 tf

Wi1.kat= 32.72+0.3*4.312) =34.01 tf

Ground floor building weight G = 30.382 tf, Q = 4.312 tf

Wizemin= 30.382 + 0.3*4.312 tf =31.68tf

∑Mxkoruyucu= 34.01*3.175 +31.68*3.175 =208.56 tf

Verification of x-direction overturning moments

1st floor earthquake force Fx1 = 12.57 tf

ground floor earthquake force Fxz = 5.73 tf

∑Mdevirici= 12.57*6+5.73*3 =92.61 tfm

Verification of y-direction protective moments

1st floor building weight G = 32.72 tf, Q = 4.312 tf

wy1= 32.72+0.3*4.312) =34.01 tf

Floor. floor structure weight G = 30.382 tf, Q = 4.312 tfm

wyz= 30.382 + 0.3*4.312 tf =31.68tf

∑Mxkoruyucu= 34.01*2.15 +31.68*2.15 =141.23 tfm

Verification of y-direction overturning moments

1st floor earthquake force Fy1 = 12.59 tf

ground floor earthquake force Fxz = 5.74 tf

∑Mdevirici= 12.59*6+5.7*3 =92.78 tfm

X Direction Structure overturning moment control

ΣM overturning / ΣM protective = 92.61 / 208.56 = 0.44 <0.5 provided the

Y-Direction Structure overturning moment control

ΣM overturning / ΣM protective = 92.78 / 141.23 = 0.67> does not provide 0.5


Program report


See also

Structure Mass