05-14-2013, 11:51 AM
@ Andersen,
Thanks for these photos
I have the following conclusions :
1- The Roof is in a good condition (Photo-2)
2-I see some failures at Joints Between Top & Bottom of Columns With Beams & Slabs
( Photo 2&3)
3- the Building is surrounding by other existing Buildings (Photo 1&2)
it means the chance of failure due to lateral Movement is very less..
4- Photo Number #4 is very important photo...
It is very clear to see the explosion of concrete happend at connection between Columns & Beam ..
And one more important thing in this photo , we can see shortage of Links in at this Joint
Look Carefully , you will not see any Stiurps to confine the column
and Look again you can see the the total Length of column is in a good condition
But Badly the weak Point in the column at connection between Beam& Column leads to this failure ....
4- The Strucutral System of Buidling is RC Frames (Beams + Columns)
5- the number of floors > 5 Floors
From these Notes I expect the failure Happened due to two Reasons
1- Senario #1 : Connections Between Col& Beams Are Good
But due to overloads on ground floor , 1st & Second columns.. so failure start from these floors and then Propagate to upper floors..
Upper Floors , Columns in A good conditions , but due to addition moments that added to connections due to failure of below floors.. so Second failure mode start at these Joints as we can see in the photos
2- Senario #2 : All Columns are in a good condition , Weakness at joints
Failure Start from Below Floors at the Joints ( See Photo 1 Chain of columns are in a good condition)
Thanks for these photos
I have the following conclusions :
1- The Roof is in a good condition (Photo-2)
2-I see some failures at Joints Between Top & Bottom of Columns With Beams & Slabs
( Photo 2&3)
3- the Building is surrounding by other existing Buildings (Photo 1&2)
it means the chance of failure due to lateral Movement is very less..
4- Photo Number #4 is very important photo...
It is very clear to see the explosion of concrete happend at connection between Columns & Beam ..
And one more important thing in this photo , we can see shortage of Links in at this Joint
Look Carefully , you will not see any Stiurps to confine the column
and Look again you can see the the total Length of column is in a good condition
But Badly the weak Point in the column at connection between Beam& Column leads to this failure ....
4- The Strucutral System of Buidling is RC Frames (Beams + Columns)
5- the number of floors > 5 Floors
From these Notes I expect the failure Happened due to two Reasons
1- Senario #1 : Connections Between Col& Beams Are Good
But due to overloads on ground floor , 1st & Second columns.. so failure start from these floors and then Propagate to upper floors..
Upper Floors , Columns in A good conditions , but due to addition moments that added to connections due to failure of below floors.. so Second failure mode start at these Joints as we can see in the photos
2- Senario #2 : All Columns are in a good condition , Weakness at joints
Failure Start from Below Floors at the Joints ( See Photo 1 Chain of columns are in a good condition)