What is yield line in slab?

The yield line analysis is an upper bound method in which the predicted failure load of a slab for given moment of resistance (capacity) may be higher than the true value. Thus, the solution of the upper bound method (yield line analysis) may result into unsafe design if the lowest mechanism could not be chosen.

What are the advantages of yield line design?

Yield line design has the advantages of (economy, simplicity and versatility), yield line design leads to slabs that are quick and easy to design, and are quick and easy to construct. The European Concrete Building Project at Cardington, which tested a variety of methods of designing flat slabs.

What is analysis of slab?

Two basic methods [1], [2], [3] are commonly used to analyse slabs spanning in two directions. These are the theory of plates which is based on elastic analysis under service loads, and yield-line theory in which the behaviour of the slab as collapse approaches is considered.

What is yield line method?

The yield line method is a method for the design or assessment of concrete slabs. It’s value is that it accounts for redistribution of forces that take place after the slab’s reinforcement yields.

What is a yield line?

A yield line, also called shark’s teeth or a give way line, is a type of marking used to inform drivers of the point where they need to yield and give priority to conflicting vehicle or pedestrian traffic at an intersection or roundabout controlled by a yield sign.

What is yield line theory?

What is Yield Line Theory? The yield line theory of analysis is a factored or ultimate load method of analysis. The yield line theory is conducted based on the bending moment of the structural element at its collapse state. The yield analysis was proposed by Ingerslev in 1923.

How do you calculate point load on a slab?

Slab Load Calculation = 0.150 x 1 x 2400 = 360 kg which is equivalent to 3.53 kN. Now, If we consider the Floor Finishing load to be 1 kN per meter, superimposed live load to be 2 kN per meter, and Wind Load as per Is 875 Near about 2 kN per meter.

What is the direction of yield line in one way slab?

In a one-way slab, the direction of yield line is perpendicular to the direction of steel. But in a two-way rectangular slab, the direction of yield lines may not be perpendicular to the direction of reinforcement. A two-way slab can be supported on all of its edges or any three of its edges.

How do you calculate line load?

The load on the slab is given in terms of how much line load the beam has to sustain. This line load applied to the beam is obtained by multiplying the distributed pressure applied on the tributary area of the slab by the beam spacing (Fig. 6).

How is slab calculated?

Measure the length and width that you’d like to cover. Multiply the length by the width to determine square footage. Convert the thickness from inches to feet….Here’s what the math looks like for a 10′ by 10′ concrete patio: