Identification of Cracks

• What is mode of failure or damage of the beams in the figure above? are the damage repairable ?Elaborate

• We can clearly see in this image damage is done in the bottom of the beam and column is clear
• The above Figure shows that flexural cracks devlop at the bottom part of the beam
• Flexural failure appears due to excessive load on beam that leads to flexural failure
• flexural crack devlop due to the cracking and spalling of concrete and yielding of steel reinforcement
• We can clearly see cracks in the beam are devloped from the bottom to top

b)

• This image clearly shows the failure along beam column edge
• This failure occurs during construction process
• This failure also known as pull out failure
• This failure devlop due to inadequate rebar development along beam to column
• Thus joint will be weak and cracks will be devloped vertically

c)

• This image clearly shows beam column connection failure
• This failure appears due to wrong detailing
• Shear crack devloped due to lateral seismic load that can lead to collapse of the building

Q2)

ANS:

• This above image shows the crusing of the concrete
• This is the perfect example of compression of the concrete
• This type of failure happen when column are spaced away fropm the beam
• This type of failure is plastic hinge failure and happen due to lack of ineffective transfer of laod
• This type of failuire is non repairable

• This is an pure ecample of pure shear failiure
• As we can see that column is severaly crushed so its not possible to repair
• For this new structure must be provided to support the existing structure

• This type of failure is short column failure
• This failure is also non repairable
• When length of column decreases column becomes stiffer and shear force increases