preliminary design of columns
preliminary design of columns
(OP)
wuld like to know easy n most accurate way for preliminary estimate of column dimensions as i dd for the continuous beams effctv length/depth < 26 accordn to bs8110prt1. How abt for the columns?thanx






RE: preliminary design of columns
Capacity is roughly 0.5*f'c at Le/r=20 ; 0.4*f'c at Le/r=35 ; 0.3*f'c at Le/r=45 ; 0.2*f'c at Le/r=60 and 0.05*fc at Le/r=100.
This is for columns which aren't generally required to take lateral forces. Lateral forces is a completly different game.
RE: preliminary design of columns
RE: preliminary design of columns
Maybe you should start out with a low concrete strength which you know can be increased if necessary.
BA
RE: preliminary design of columns
Dik
RE: preliminary design of columns
RE: preliminary design of columns
RE: preliminary design of columns
BA
RE: preliminary design of columns
RE: preliminary design of columns
The N40-1% refers to 40MPa concrete with 1% reo and likewise N80-4% refers to 80MPa concrete with 4% reo. Anything multi-storey I go straight for the high-grade concretes, in my region 80MPa concrete is readily available and only 25% price increase from the standard 32 and 40MPa stuff that is normally used for slabs. 28 and 56-day cylinder breaks normally go to the 100+MPa realm.
Special confinement clauses for high strength column ties does bump up the ties required.
RE: preliminary design of columns
RE: preliminary design of columns
Can you walk through the process you went through to generate those curves?
RE: preliminary design of columns
RE: preliminary design of columns
RE: preliminary design of columns
Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis
http://www.engissol.com/cross-section-analysis-des...
RE: preliminary design of columns
RE: preliminary design of columns
http://www.scribd.com/doc/66504462/MacGregor-Slend...
The attached has a paper with generic interaction diagrams for single curvature columns with varying h/t ratios.
RE: preliminary design of columns
All about Eurocodes:
http://www.DesignToEurocodes.com