Quantity Take Off or QTO is a well known project estimating company serving to the contractors, home builders, architects, design- build firms and sub contractor trade. We are providing estimating service since 2002 with a great chronicle of success.
Illustration of stress-strain curve for concrete and steel
construction video tutorial will teach you the detailed process for creating
the design of stress-strain curve of concrete and steel by adhering to the IS
456:2000. Limit State Method is used here for these curves.
As the tensile
strength of concrete as compared to compressive strength is very week, it can
only withstand compressive stress. Alternatively, the tensile strength of steel
is very strong and it can withstand both tensile and compressive strength.
While going to design a structure located in costal area and as
per IS code the minimum grade of concrete for this structure should be M30 and
concrete can’t be used below this grade. It is known that 30th characteristic
strength of concrete cube of size 150 mm at 28 days. The characteristic strength
is represented with the symbol as fck.
stress-strain curve for hardened cement paste is nearly linear. The aggregate
is more stiff as compared to the cement paste and will consequently deform less
(i.e. contain a lower strain) under the similar applied stress.
stress strain curve of concrete remains among those of the aggregate and the
cement paste. But this alliance is non-linear over the most of the range. This
non-linear behavior occurs because of formation of micro-cracks for the
following reasons :-
(i) At the
interface among aggregate particles and cement paste due to the differential
movement among the two phases, and (ii) Inside the cement paste itself.
These cracks are developed owing to variations in temperature and
moisture and the application of load.
learn the detailed process, watch the following video tutorial.
Read Continue ~~~~~~~~~~~~~~~~~~~~~~~~ Published By Rajib Dey www.constructioncost.co ~~~~~~~~~~~~~~~~~~~~~~~~