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Derive design stress block parameters for singly RC section for LSM of design.
1 Answer
written 8.8 years ago by | • modified 8.8 years ago |
Now from strain diagram,
aXu=0.0020.0035a=47Xu
Area :-
Rectangle :
=37Xu×0.446fckA1=0.191fckXu
Parabola :
23×47×Xu×0.446fckA2=0.169fckXu
Y top
37Xu×12=314Xu=314Xu+37Xu=914Xu
A=0.191fckXu+0.169fckxuA=0.36fckXu
¯ytop=A1y1+A2y2A1+A2¯ytop=(0.1914×fckXu×314Xu)+(0.169×fck×Xu×914Xu)0.36fukXu¯y=0.42Xu