I am hoping to use STAAD for beam design for a run of simple span beams with dead and live loads.
I currently can not get the program to stop designing for deflection based on factored loads.
I was strength design based on envelope 2 and deflections for envelope 1. Is this possible for Canadian Codes?
STAAD SPACE START JOB INFORMATION ENGINEER DATE 30-Jul-18 END JOB INFORMATION INPUT WIDTH 79 UNIT FEET POUND JOINT COORDINATES 1 0 0 0; 2 15 0 0; 3 25 0 0; 4 50 0 0; 5 71 0 0; MEMBER INCIDENCES 1 1 2; 2 2 3; 3 3 4; 4 4 5; DEFINE MATERIAL START ISOTROPIC STEEL E 4.28151e+009 POISSON 0.3 DENSITY 489.024 ALPHA 1.2e-005 DAMP 0.03 TYPE STEEL STRENGTH FY 5.28819e+006 FU 8.51708e+006 RY 1.5 RT 1.2 END DEFINE MATERIAL MEMBER PROPERTY CANADIAN 1 TO 4 TABLE ST W360x39 CONSTANTS MATERIAL STEEL ALL SUPPORTS 1 TO 5 PINNED MEMBER RELEASE 1 TO 4 START MX MY MZ 1 TO 4 END MX MY MZ LOAD 1 LOADTYPE Dead TITLE Dead MEMBER LOAD 1 TO 4 UNI GY -150 LOAD 2 LOADTYPE Live REDUCIBLE TITLE Live MEMBER LOAD 1 TO 4 UNI GY -330 LOAD COMB 3 Generated NBC 2005 ULS 1 1 1.4 LOAD COMB 4 Generated NBC 2005 ULS 2 1 1.25 2 1.5 PERFORM ANALYSIS DEFINE ENVELOPE 1 2 ENVELOPE 1 TYPE SERVICEABILITY 3 4 ENVELOPE 2 TYPE STRENGTH END DEFINE ENVELOPE PARAMETER 1 DFF 360 ALL CODE CANADIAN LAT 1 ALL PARAMETER 2 CODE CANADIAN TRACK 2 ALL SELECT ALL FINISH
You need to use the LOAD LIST ENV 1 2 to before the design to ensure that the design process uses the envelopes. Also I have commented out a few redundant PARAMETER and CODE CANADIAN commands to clean up the file.
In addition, when you do a SELECT you should group members and do a reanalysis followed by a CHECK CODE. A modified file is attached for your reference.
4705.Structure1.STD
Answer Verified By: Jason Hoel
Thank you very much.
To anyone who may find this post, I have experimented and found how to make a total load / live load deflection check separate.
This checks the total load L/360 limit first, sizes the member, then checks the sized member against live load L/480 limit
STAAD SPACE START JOB INFORMATION ENGINEER DATE 30-Jul-18 END JOB INFORMATION INPUT WIDTH 79 UNIT FEET POUND JOINT COORDINATES 1 0 0 0; 2 20 0 0; 3 51 0 0; 4 71 0 0; MEMBER INCIDENCES 1 1 2; 2 2 3; 3 3 4; DEFINE MATERIAL START ISOTROPIC STEEL E 4.28151e+009 POISSON 0.3 DENSITY 489.024 ALPHA 1.2e-005 DAMP 0.03 TYPE STEEL STRENGTH FY 5.28819e+006 FU 8.51708e+006 RY 1.5 RT 1.2 END DEFINE MATERIAL MEMBER PROPERTY CANADIAN 1 TO 3 TABLE ST W360X39 CONSTANTS MATERIAL STEEL ALL SUPPORTS 1 TO 3 PINNED MEMBER RELEASE 1 TO 3 START MX MY MZ 1 TO 3 END MX MY MZ LOAD 1 LOADTYPE Dead TITLE DEAD MEMBER LOAD 1 TO 3 UNI GY -350 SELFWEIGHT Y -1 LOAD 2 LOADTYPE Live REDUCIBLE TITLE LIVE MEMBER LOAD 1 TO 3 UNI GY -770 LOAD COMB 3 GENERATED NBC 2005 ULS 1 1 1.4 LOAD COMB 4 GENERATED NBC 2005 ULS 2 1 1.25 2 1.5 PERFORM ANALYSIS DEFINE ENVELOPE 1 2 ENVELOPE 1 TYPE SERVICEABILITY 3 4 ENVELOPE 2 TYPE STRENGTH 2 ENVELOPE 3 TYPE SERVICEABILITY END DEFINE ENVELOPE LOAD LIST ENV 1 2 PARAMETER 1 CODE CANADIAN DFF 360 ALL *CODE CANADIAN LAT 1 ALL *PARAMETER 2 *CODE CANADIAN TRACK 2 ALL SELECT ALL *GROUP MEMB 1 TO 3 PERFORM ANALYSIS LOAD LIST ENV 1 3 PARAMETER 2 CODE CANADIAN DFF 480 ALL CHECK CODE ALL FINISH