أريد إجابه هذا السؤال سريعا جدا
حسب الكود البريطاني BS8110:PART1:1997
1-بالنسبة للكمرة :
A- DETERMINE THE NETURAL AXIS DEPTH USING THE EQUILIBRIUM EQUATION
T = C i.e TENSION = COMPERSSION
T=0.95fy*As
C=0.45fcub*0.9X
0.95fyAs = 0.45fcub0.9X
T=0.95fy*As
C=0.45fcub*0.9X
0.95fyAs = 0.45fcub0.9X
B- COMPUTE LEVER ARM Z
Z= d - 0.45X
C- COMPUTE ULTIMATE MOMENT OF RESISTANCE
Mu = CZ = TZ
بالنسبة للعمود:
A- IF THE COLUMN CARRY AXIAL LOAD ONLY
USE EQUATION (28) BS8110
USE EQUATION (28) BS8110
N = 0.4fcuAc + 0.8fyAsc
B- IF COLUMN IS SHORT BRACED SUPPORTING AN APPROXIMATELY SYMETRICAL ARRANGEMENT OF BEAMS
[B][FONT=Arial][COLOR=red]
USE EQUATION (28) BS8110
N = 0.35fcuAc + 0.7fyAsc
C- BY USING COLUMN CHARTS (BS8110: PART3)FROM END TO FIRST
i- CALCULATE THE PERCENTAGE OF REINFORCEMNET = As/bh
ii- CHOOSING SUITABLE CHART; DEPEND ON fcu, fy, d/h
iii- THEN PERCENTAGE OF REINFORCEMENT PLOT AS CURVE
iv- EACH POINT LIES IN THIS CURVE GIVE PROBABLE VALUE FOR BOTH AXIAL LOAD AND MOMENT M
MOMENT
i- IF COLUMN UNDER UNI-AXIAL MOMENT THEN MOMENT OF CAPACITY = M
i- IF COLUMN UNDER BAIAXIALL MOMENT MANY CONSIDERADITON MUST BE IVESTIGATED . REFER TO BS8110 CL 3.8.4.5
NOTE
SPECIAL CONSIDERATION MUST BE TAKEN INTO ACCOUNT IN THE CASE OF SLENDER COLUMN CL 3.8 BS 8110
i- CALCULATE THE PERCENTAGE OF REINFORCEMNET = As/bh
ii- CHOOSING SUITABLE CHART; DEPEND ON fcu, fy, d/h
iii- THEN PERCENTAGE OF REINFORCEMENT PLOT AS CURVE
iv- EACH POINT LIES IN THIS CURVE GIVE PROBABLE VALUE FOR BOTH AXIAL LOAD AND MOMENT M
MOMENT
i- IF COLUMN UNDER UNI-AXIAL MOMENT THEN MOMENT OF CAPACITY = M
i- IF COLUMN UNDER BAIAXIALL MOMENT MANY CONSIDERADITON MUST BE IVESTIGATED . REFER TO BS8110 CL 3.8.4.5
NOTE
SPECIAL CONSIDERATION MUST BE TAKEN INTO ACCOUNT IN THE CASE OF SLENDER COLUMN CL 3.8 BS 8110
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