Hi everyone,
I am using SS5 10.65, I have tested 2 cases of tapered section within AISC 2005 ASD/LRFD.
Case 1: Tapered section is a straight member, it means start depth is equal to end depth.
1 TAPERED 0.516 0.004 0.516 0.175 0.008 0.175 0.008
This case is no problem with AISC 2005, it still give me a beautiful report. OK.
Case 2: Tapered section is a not straight member, it means start depth is not equal to end depth
1 TAPERED 0.316 0.004 0.516 0.175 0.008 0.175 0.008
I have got this message: WARNING: DESIGN OF SECTION FOR MEMBER # 1 IS NOT SUPPORTED.
The question is a truly tapered section is not supported in AISC 360- 2005?
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STAAD PLANE
START JOB INFORMATION
ENGINEER DATE 19-Nov-14
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 12 0 0;
MEMBER INCIDENCES
1 1 2;
DEFINE MATERIAL START
ISOTROPIC STEEL
E 2.05e+008
POISSON 0.3
DENSITY 76.8195
ALPHA 1.2e-005
DAMP 0.03
TYPE STEEL
STRENGTH FY 253200 FU 407800 RY 1.5 RT 1.2
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
*Case 1
1 TAPERED 0.516 0.004 0.516 0.175 0.008 0.175 0.008
*Case 2
*1 TAPERED 0.516 0.004 0.516 0.175 0.008 0.175 0.008
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
1 PINNED
2 FIXED BUT FX FZ MZ
LOAD 1 LOADTYPE Dead TITLE DEAD
MEMBER LOAD
1 UNI GY -10
PERFORM ANALYSIS
PARAMETER 1
CODE AISC UNIFIED 2005
METHOD ASD
CB 0 ALL
FYLD 345000 ALL
DMAX 2100 ALL
LY 6 ALL
TRACK 2 ALL
UNB 6 ALL
UNT 6 ALL
CHECK CODE ALL
FINISH
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