of Structural Analysis & Design - Design
are taken by slabs and transferred to main beams.
Columns take the loads from main beams and transfers
it to the foundation, which finally transfers
to the ground. Hence it is important that the
design procedure also be in that order.
A structure should be strong enough to support
the loads acting on it. Hence estimation of the
loads with sufficient accuracy is very essential
in structural design.
A structure may be acted up on by many types of
loads. Dead Loads
are estimated based on unit weight of materials.
The live load on
floors and the wind loads
are obtained. The effect of earth
quake load is also considered and loads
are calculated according to the standards
of building codes.
Preliminary Analysis and Design
to analyze statically indeterminate structures
the dimensions of the member should be known.
Moreover any member is acted upon by its own self
weight and hence to design such a member its self
weight must be known. Hence the approximate dimensions
of various members are fixed, before carrying
out a detailed analysis and design. This is done
by performing a preliminary analysis from experience.
The allowable span-depth ratio is taken from IS456
- 1978 clause 22.2.1
Analysis and Design of Slabs
loads on slab are taken from IS 875-1964. Depending
on the support condition and span ratios the slabs
are analyesd in accordance with IS456 -1978 clause
22.2.1. Slabs were designed by limit state using