Vado Dara Building Collapse

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SURVEY OF COLLAPSED BUILDINGS IN VADODARA 2013

SURVEY OF BUILDINGS COLLAPSED IN VADODARADr. B. A. Shah M.S. University www.sefindia.org Page 1

SURVEY OF BUILDINGS OF MADHAV NAGAR

SOCIETY WHERE TWO BUILDINGS

COLLAPSEDATALADARA, VADODARA

BY THE STUDENTS OF ME ( STRUCTURES),

FACULTY OF TECHNOLOGY & ENGINEERING,M S University of Baroda, Vadodara

EDITED BY

Dr. B. A. SHAH,

Associate Professor

The M. S. University of Baroda

29 August 2013


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GROUP-1

SHAH AMI ME-III

KALE ANJALI ME-III

PANCHAL NISHITH ME-III

GARGI SINVHAL ME-I

DRASHTI DAVE ME-I

JAINESH BHAVSAR ME-I

FINASALI NAVSARIVALA ME-I

ANUBHAV BANSAL ME-I

GROUP-2

GAMIT NIRAV ME-III

JINYAWALA MOHAMMAD ME-III

SAGAR RAJESH ME-III

PARTIWALA DHRUV ME-I

RANTAL AMEY ME-I

CHAUDHARI ASHISH ME-I

BHAGAT BHAVIN ME-I

ALITHA TASLIM ME-I


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First Inspection Report

1.Date and Time of Incident

28/08/2013, 4:30 a.m.

2.Date and Time of Inspection

29/08/2013, 12:30 p.m.

3.Any warnings of collapse prior to incident (Cracks, deformations etc. full description of the same)

People felt the vibrations at upper floors.

Material had started crumbling.

Cracks were observed at number of places

4.Collapse trigger- Was there any specific trigger for collapse? E.g.

earthquake, sudden change in soil pore water pressure, sudden change in

loading of the structure, removal of any structural member such as

masnory wall of any floor etc.?

Collapse trigger may be due to sudden change in soil pore water

pressure.


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Figure 1-Bulging of masonary walls nearby collapsed building

People of Madhavnagar were complaining about distress shown by

crumbling plaster and cracks which had appeared in the masonary

walls for more than 3 months. One such representation was made to

the news reporters of local TV channel on the previous eve of the

event.

There was continuous heavy rains for more than a month before the

incidence and water logging in the building area was observed due to

the level of surrounding roads being 600 mm above the plinth level

of the buildings. Deterioration of masonry walls over a period of

time and poor quality of construction may have added to the process

of structural collapse.

5. Is it possible to see where (in which location of the building) the collapsestarted?

It is not possible to see from, where the collapse of the structure

started but as per residences the central load bearing wall collapsed.

6. If yes, where?

----


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7. Is there a collapse mechanism that is possible to identify? If yes, pl

elaborate.

The foundation was affected by the leakage problems of the under-

ground water tank and accumulation of rain water because of the

level difference in road level and floor level was observed. So, one of

the masonry walls failed at ground level and thus the whole building

collapsed.

Figure 2-Crack observed in base slab of under-ground water tank

nearby collapsed building

8.What kind of a structural system does the building have?

a. RC Ductile Moment frames

b.RC Non-ductile moment frames

c. RC Shear walls + RC ductile moment

frames

d.RC shear walls + non-ductile moment

frames

e.No well defined frames

f. Loadbearing masonry structure withlintel, plinth and roof bands


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g.Loadbearing masonry structure without

bands

h.Other (pl elaborate)

Load bearing masonry structure with plinth bands, withoutcontinuous lintel bands and no roof band.

Figure 3 Condition of lintel beam in one of the surviving buildings


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Figure 4 One more lintel in a nearby building

9. Is there adequate framing of the structure- (Are there adequate beam-

masonary wall frames in each direction?) Draw a plan of the building.

What is the quality of concrete?

a. in masonry walls

b. in beams

c. in slabs

d. in beam-masonry wall junctions

(Are there any voids in concrete, hollows regions, is the concrete

totally crumbled, is the cement-FA-CA ratio problematic on visual

inspection etc.)


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Figure 5 Layout plan of Madhavnagar buildings, Vadodara

There were about 36 nos. G+3 blocks out of which two blocks marked in

yellow collapsed

Figure 6 Elevation and Plan of a typical block


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Figure 7 Typical Plans

Poor quality of concrete and mortar was observed. The mortar was easily

getting removed from the masonary joints simply by scratching. Fig. 8

shows a typical chunk of concrete and crumbled masonary.


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Figure 8 Poor quality of material

10. What is the quality of the steel (is there corrosion)a. in masonary walls

b. in beams

c. in slabs

d. in beam- masonary wall junctions

Yes, the reinforcing steel was corroded in most of the blocks

as seen in the following photographs.


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Figure 9 Corrosion of steel due to lack of proper cover

11. Is there adequate steel (at least min required as per code)

a. in masonary walls

b. in beams

c. in slabs

d. in beam-masonary wall junctions

(Pl elaborate with spacing and dia of masonary wall and beam rings,

spacing and dia of beam stirrups, dia and no. of main bars in masonary

walls and beams, steel in beam-masonary wall junctions, development of

bars in junctions)

Cannot comment as dia and spacing of reinforcement was

not observed.

12.At which level was maximum damage?

At ground level where the masonary walls showed distress

and third floor slab level where the spalling of ceiling plasterwas observed due to seepage of rain water.


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Figure 10 Ground floor masonry walls showing damage


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Figure 11 Ground floor masonry showing poor maintenance

Figure 12 Condition of existing ground floor masonry walls


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Figure 13- Swelling of floor slab


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Figure 14- Hogging effect of the beam at ground level

Figure 15- Leakage of water from terrace slab

Figure 16 Cracks observed in walls at 3rd

floor along with

water leakage which has not been attended to.


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Figure 17- Cracks observed in the beams supporting over head water tank

at terrace floor level


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13.Was there a structural engineer on the project? If yes, who?

No information is available.

14.Was there a third party check of the design?


15.Was the design vetted by VUDA?


16.Was there a construction supervision agency? If so, who?


17.What were the procedures for monitoring construction quality and

conformance to design?


18.Is there any obvious foundation failure? If yes, pl elaborate.

no details are available regarding foundation.

19.Pl elaborate on any other details that are observed and inferred during

the field study

Bulging of the masnory walls,

Twisting of beams,

Under-ground water tank leakage,

Sagging and hogging of beams,

Structural cracks in members,


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Poor quality of materials,

Inadequate cover to the concrete members.

20.Pl add as many photographs as possible of failures at global andlocal levels of structure

Remains of the collapsed buildings


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Documents

Vado Dara Building Collapse