Identification of Cracks

Q1

Aim:- To explain the modes of failure of the images shown

BEAM COLUMN CONNECTION FAILURE

• this type of failure is due to the formation of plastic hinges at the undesirable locations
• this type of failure occurs when the elements are subjected to very high shear force during seismic activity
• plastic hinges should be formed at the end of the beams and not at the beam-column connection
• if these cracks are left unattended will lead to loss of strength and collapse

Q2

AIM:- To define the type of failure in the images shown

• SHEAR COLUMN FAILURE
• this follows the mechanism of the strong beam and weak column
• the buckling of longitudinal reinforcement due to high compressive forces

CONFINEMENT FAILURE OF THE COLUMN

• this is due to the improper formation of plastic hinges
• improper detailing of the longitudinal reinforcement which leads to the failure of compression in concrete

SHORT COLUMN EFFECT

• it is caused due to the influence of partial infill height of the concrete which increases column shear failure and leads to the undesirable mode of deformation
• the shorter columns attract the higher shear force which leads to the deformation or collapse