What are the advantages of Prestressed Concrete over Conventional Reinforced Concrete?

Anchor Block for Post Tensioning

What are the advantages of Prestressed Concrete over Conventional Reinforced Concrete. The prestressing of concrete has several advantages as compared to traditional reinforced concrete without prestressing. A fully prestressed concrete member is usually subjected to compression during service life. This rectifies several deficiencies of concrete. Serviceability and Strength Reduces occurrence of cracks . Freezing & … Read more

Failure modes in beams | Types of Failure in Reinforced Concrete Beams

Development Of Cracks in Beams

Failure Modes in beams There are two common types of failure in slender, non Prestressed flexural elements that carry the load in one direction only are Compression failure of the Compressive Chord “ductile flexural failure”:  After yielding of the reinforcement, if no redistribution of forces is possible, the deformations of the beam become important while … Read more

Ribbed or Waffle Slab System – Advantages & Disadvantages

Waffle Slab Construction

Ribbed (Waffle) Slab System Ribbed floors consisting of equally spaced ribs are usually supported directly by columns.They are either one-way spanning systems known as ribbed slab or a two-way ribbed system known as a waffle slab. This form of construction is not very common because of the formwork costs and the low fire rating. A 120-mm-thick … Read more

Beam and Slab Floor System

beam column slab construction

Beam and Slab Floor System This system consists of beams framing into columns and supporting slabs spanning between the beams. It is a very traditional system. The relatively deep beams provide a stiff floor capable of long spans, and able to resist lateral loads. However, the complications of beam formwork, co-ordination of services, and overall … Read more

Basics of Flat Plate Floor System – Advantages & Disadvantages

Burj Dubai Copyright Imre Solt 2007 (2) Small

Flat Plate The flat plate is a two-way reinforced concrete framing system utilizing a slab of uniform thickness, the simplest of structural shapes. Flat Plate System Introduction A flat plate is a one- or two-way system usually supported directly on columns or load bearing walls. It is one of the most common forms of construction … Read more

What is Punching Shear? Punching Shear in Flat Slabs

Flat Slab Failure due to Punching shear

What is Punching Shear? Punching shear is a type of failure of reinforced concrete slabs subjected to high localized forces. In flat slab structures this occurs at column support points. The failure is due to shear. This type of failure is catastrophic because no visible signs are shown prior to failure. Punching shear failure disasters … Read more

Spalling of Concrete – Causes, Prevention & Repair

Spalling of Concrete slab due to corrosion

Spalling of Concrete – Causes, Prevention & Repair ingress of moisture of air into concrete causes corrosion of reinforcement and results in the volume expansion of steel bars, consequently causing cracks & spalling of concrete cover The word Spall in engineering, describes the chips or fragments of a material that is broken off a bigger … Read more

Diagonal Cracks in Foundation and Walls

Diagonal Crack at the corner of a strip footing

Diagonal Cracks in Foundation and Walls Diagonal cracking is an inclined crack beginning at the tension surface of a concrete member. Steep diagonal cracks appear in concrete foundation due to point loads that exceed the compressive strength of the concrete. This type of failure, known as settlement, can happen due to “volume changes in clay soils … Read more

Concrete Creep Definition, Creep deformation Stages & Design Strategies

Creep Cracks In Concrete Walk Way

Concrete Creep Definition, Creep deformation Stages & Design Strategies When load is applied on a concrete specimen, shows an instantaneous deformation followed by slow increase of deformation is called concrete creep. Creep is a time-dependent permanent (plastic) deformation under a certain applied load.  Generally, creep occurs at high temperature (thermal creep) but can also happen … Read more