Full Answer
What are the dimensions of a waffle slab?
analysis of waffle slab from which few are as listed below. 1) Analysis of grid by Rankine Grashoff – method. 2) Analysis by plate theory. 3) Stiffness method. 2.1 Rankine - Grashoff Method . This is an approximate method. It is based on equating deflections in either direction at the . WAFFLE SLAB-Naziya Ghanchi1, Chitra V.2. 1
How do you make a waffle slab stronger?
In this case, four options can be considered: 1) increase the slab thickness further, 2) use headed shear reinforcement in the slab, 3) apply drop panels at columns, or …
Are there any risks to be aware of with waffle slabs?
Nov 01, 1991 · The 100-million-dollar project involved construction of a 487,500-square-foot underground wing connected to the existing convention center by a series of tunnels. Crews poured a 168,000-square-foot, post-tensioned waffle slab comprising 22,500 cubic yards of concrete. The waffle slab forms part of the street-level roof topping the underground wing.
Do you prefer waffle pods or raft and beam slabs?
Apr 15, 2014 · Waffle pod void formers tend to max out at 375mm deep (so providing 475mm deep beams and ribs with a 100mm slab). Some designers try to achieve extra slab stiffness by adding more steel reinforcement. Experienced structural engineers know that steel reinforcement plays a very minor role in achieving increased concrete beam stiffness.
How do you strengthen an existing slab?
Increasing the shear bearing capacity of the slab by adding steel plates strengthened by vertical screw bolts. Strengthening of the slab by post stressed reinforcement. Adding steel beams. In case of hollow slabs, reinforced concrete is added inside the holes of the slab.Oct 10, 2013
How do you reinforce an existing concrete beam?
Addition of steel bars to the main reinforcement without increasing the cross section of the beam:Holes in the span of a beam.Strengthening a beam without increasing its cross sectional area.Strengthening of beam by addition of steel bars and increasing the cross-sectional area of concrete.More items...•Mar 3, 2018
How do you strengthen existing concrete columns?
Column strengthening is a process used to add or restore ultimate load capacity of reinforced concrete columns....Steel Jacketing ProcessRemoving the concrete cover.Cleaning the reinforcement steel bars using a wire brush or a sand compressor.Coating the steel bars with an epoxy material that would prevent corrosion.More items...•Oct 3, 2014
Are concrete waffle slabs cast in place?
In-situ waffle slabs are constructed by pouring concrete in the site or field with proper arrangements. In case of precast waffle slab, slab panels are casted somewhere and they are joined together with proper reinforcement and concrete is filled.Dec 13, 2017
How do you improve an existing structure?
Structural strengthening techniques for existing building and...Epoxy injection. ... FRP Composite System – PT and Non-PT. ... FRP Laminate Systems -PT and Non-PT. ... Fiber-mesh Reinforced cementitious mortar (FRCM) ... Micro reinforced Jacketing.May 31, 2021
How do you reinforce I beams?
Weld stiffener plates to the bottom of the beam. By adding mass to the bottom of the beam, deflection is minimized and carrying capacity is increased. The plates can be any size, but the most efficient reinforcement occurs when the plates are the same width as the beam, and run the entire length of the beam.
How do you repair a damaged concrete column?
Columns may be repaired by using one or more of the following methods:Encasement or enlargement of the column cross section (jacketing).Cathodic protection to stop reinforcing steel corrosion.Re-alkalization of the reinforcing steel to stop corrosion.Chloride extraction to retard the reinforcing steel corrosion.More items...•May 22, 2014
What are the four ways to strengthen structures?
11.2 Making Structures strong :the beamSupporting the Beam. -A tie supports structures of a framework and it is designed to resist tension forces . ... Corrugation. -Placing triangular ridges ,grooves,or folds in a structure is called corrugation . ... Rebar. ... Introduction. ... I-Beams. ... Strengthening the beam.
What is the disadvantage of waffle slab?
Disadvantages of Waffle Slabs Waffle slab was not used in conventional construction projects. Its is expensive, so it is only economical when large scale production of similar units is desired. Construction requires rigorous supervision and skilled labour.Mar 20, 2021
Are waffle slabs good?
If you are looking to create a strong structure that can go for decades without showing any signs of damage, waffle pod slabs are the way to go. This system features greater stiffness and strength compared to conventional footing methods. It offers greater resistance to cracking.Nov 7, 2019
Why are waffle slabs used?
Waffle slabs work well on almost flat sites, natural soils or controlled fill, that have good surface strength and where the natural ground surface falls away from the outsides of the building in all directions (ie when the building pad has been built up with solid, water-shedding dirt).Apr 16, 2014
What is Waffle Slab?
Slabs required supports which is given in the form of columns so that the load coming on the slab can be transmitted through it at the foundation. But sometimes the columns act as an obstruction where longer space is required.
Waffle Slab Design
The design of the waffle slab depends upon the total area on which the waffle slab is required.
Construction of Waffle Slab
The Construction of the waffle slab is done in three ways. First is the In situ construction of the waffle slab, precast Construction and the prefabricated construction.
Waffle Slab Advantages
Load bearing the capacity of waffle slab is higher than other types of the slab.
Waffle Slab Disadvantages
The Formwork which is required for the construction of the waffle slab is very costly.
