Challenge

Identification of Cracks

Question:

Ans)

So its the form of flexural failure due to reversal of stress during earthquake because during the stress reversal support top were usually it is in tension then the structure will feel compression during an earthquake and bottom with experiences tension top compression is actually managed by the slab section because it is a concrete so the reaction of the beam has tried to manage their access compression but the bottom tension was not satisfied by the provided reinforcement that when the bottom reinforcement has yielded so led to the delaminated occurs in the bottom that bottom reinforcement got yielded it cannot be repaired

Ans)

It Is a beam pull out failure due to insufficient development length of reinforcement in the joints earthquake that moment of the structure makes his condition was bad and it detached the maybe member from the column because the sufficient Anchorage length helps the being developed sufficient Bond with the supporting member if the Anchorage of reinforcement is not sufficient if that is an inadequate reinforcement at the beam column joint the lateral movement cannot be satisfied that so the beams ultimately getting detached from the vertical providing Anchorage length between two existing concrete is very difficult at least one old concrete and other one is new cpncret we can use any double kind of things and we can achieve the Anchorage length but here the both elements or existing concrete and development achieving the Anchorage then between these two existing content is very difficult so it cannot be repaired

Ans)

So it is a plastic hinge failure usually plastic in failure and cyclic lateral loading and stress reversal at the joints let this damage in the slab participated to its best to handle the tension because this severely cracked that means what in underground tension with his plans condition but unable to control the damage even the flange advantage of the slab. the slab with the advantage was unable to control the damage the joint can be strengthened by micro concreting or ERPF wrapping

Question:

Ans)

So it is a ground story failure technically plastic information at column due to absence of walls at the ground floor the plastic hinge forms at the top of the ground story columns during the lateral movement and based on the development of the crush of concrete it can be repaired or not repairable based on the severity of the column spelling only we can conclude whether it is available or not if it is repairable we need to use jacketing procedure

Ans)

it is pure shear failure because the crack is it and diagonal direction and complete concretes crushed and they have detached and especially the shear reinforcement was not sufficient so entire shear force is transferring through the concrete only it had completed the concrete to break down

Ans)

Is it a short column failure so and additional slab or a beam connected to a column in mid height is lead to this effect is lead to failure especially the connection is an intentional and not accounted in design and the failure given in the picture is can’t repairable

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