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Joined: 19 Jan 2009 Posts: 2329 Location: RAJKOT,GUJARAT, INDIA
Posted: Mon May 23, 2016 3:52 am Post subject: Old Bridge Collapse
Major accident was miraculously averted when a road bridge in Keshod Taluka of Junagadh district in GUjarat broke down while a bus of the Gujarat State Road Transport Corporation popularly known as ST bus was crossing from it.
The bus miraculously did not fall off the bridge but kept half hanging. All the over a dozen passengers in the bus were safely evacuated and some of them with minor injuries were admitted to a local hospital.
Police said that the bus, which ply on Keshod-Vantwa route, was crossing the old road bridge over a dried up rainy stream near Sarod village in Keshod taluka when a part of the bridge suddenly collapsed. The bus had just crossed that portion so it did not fall and hanged over the intact part.
Around 15 passengers were evacuated with the help of local villagers. Some injured were later admitted to hospital.
Posted: Mon May 23, 2016 4:56 pm Post subject: We need to do lsomething like ASCE Report Card on Bridges.
DearEr.Harsodaji,
We need to do something like ASCE Report Card on USA Bridges. See my post dated 3rd April 2016: " ASCE Report Card on Bridges in USA. " . I attached the full ASCE report also.
How many more bridges like this are there in Gujarat State and in India? Both Govts , Gujarat and Central need to allocate Funds to do Strengthening of Existing Old Bridges. This is a Public Safety Issue.
Posted: Thu May 26, 2016 5:26 pm Post subject: CNN ( World News) Video on condition of USA Bridges
Dear Er. Harsodaji,
This is from latest ASCE Smart News Brief, 26th May 2016. Indian Institute Of Engineers and SEFI need to work with Indian News Media and produce a Video like CNN Video on condition of Existing Old Bridges in India.
CNN News Puts USA Bridges Condition on Spot Light:
With approximately 60,000 bridges across the US in need of repair, CNN has kicked off the first of a four-part series about America's crumbling infrastructure. Part one focuses on those bridges, many of which are supported by 90-year-old beams and need repairs. Federal spending on infrastructure, however, has declined about 9% over the past decade.
Posted: Fri Jun 17, 2016 4:17 pm Post subject: Condition of Infrastructure ( Bridges) in USA no better. Grade D+
Dear Er. Harsodaji,
Condition of Infrastructure ( Bridges) in USA is no better. Grade from ASCE,
D + . From Latest ASCE Smart Brief: June 17th, 2016: N.J. ASCE chapter gives state infrastructure a D+ New Jersey's roads and bridges are getting close to failing: New Jersey's infrastructure received a D+Thursday from the New Jersey chapter of the American Society of Civil Engineers-- down from a C- in 2007. "If our elected officials do not make theinvestment in our infrastructure, then we risk it falling further intodisrepair," said ASCE's Luis Barragan. "Our state lawmakers have theopportunity to put us on a better path by fixing [the state's TransportationTrust Fund] before the end of June."
I am puzzled by the mode of failure. The deck slab appears to be absolutely intact, and it appears that two masonry piers have failed completely. To the best of my understanding, traction force and/ or out-of-plumb rotation of one or both piers has led to large bending moment in the piers, causing them to fail.
Is it possible to know the age of the bridge? It seems to be new or recently repaired.
I hope others with experience in forensic engineering could comment.
Posted: Wed Jul 06, 2016 4:14 am Post subject: New way of Condition assesment of Infrastructure damage
Dear Er. Harsodji, New way of doing Condition assessment of Infrastructure damage:
From: ASCE SmartBrief July 5th 2016
Researchers develop drones that survey infrastructure: Researchers at Carnegie Mellon University and Northeastern University are developing the Aerial Robotic Infrastructure analyst to assess infrastructure damage. The system will use small drones to conduct 3D imaging of structures, identify problems and provide continued assessments.
Joined: 19 Jan 2009 Posts: 2329 Location: RAJKOT,GUJARAT, INDIA
Posted: Wed Jul 06, 2016 5:09 am Post subject: Re: New way of Condition assesment of Infrastructure damage
Dear Er. Pandya Sir,
Thank You very much. This is very useful information of advance Technology for Condition assessment of Infrastructure damage. There is strictly need to adopt this system in India, as at present Central & State both Governments are vigilant for safety issue.
Regards,
Er. B. V. Harsoda
VPandya wrote:
Dear Er. Harsodji, New way of doing Condition assessment of Infrastructure damage:
From: ASCE SmartBrief July 5th 2016
Researchers develop drones that survey infrastructure: Researchers at Carnegie Mellon University and Northeastern University are developing the Aerial Robotic Infrastructure analyst to assess infrastructure damage. The system will use small drones to conduct 3D imaging of structures, identify problems and provide continued assessments.
Joined: 19 Jan 2009 Posts: 2329 Location: RAJKOT,GUJARAT, INDIA
Posted: Wed Jul 06, 2016 5:55 am Post subject:
Dear Er.,
In the Junaghdh & Porbandar District of Gujarat some of very old structures are of limestone masonry with or without plaster. As per my opinion, this case is of failure of old lime stone masonry due to loss of strength of lime stone & masonry joints due to all types of service loads including dead load and weather effect during passed service life.
Regards,
Er. B. V. Harsoda
abhio wrote:
A lucky escape for the passengers indeed!
I am puzzled by the mode of failure. The deck slab appears to be absolutely intact, and it appears that two masonry piers have failed completely. To the best of my understanding, traction force and/ or out-of-plumb rotation of one or both piers has led to large bending moment in the piers, causing them to fail.
Is it possible to know the age of the bridge? It seems to be new or recently repaired.
I hope others with experience in forensic engineering could comment.
It is amazing that the bus is overhanging from the bridge pier and still standing. It is lucky that over a dozen passengers in the bus were safely evacuated and some of them with minor injuries.
It my opinion, it is a flexural failure of the deck slab between the main piers. It seems to have failed at 1/4 points of the span from end supports, and lot of debris is also seen on ground at these points.
As Er. Pandyaji writes both Govts , Gujarat and Central need to allocate Funds to do Strengthening of Existing Old Bridges. This is a Public Safety Issue.
With best wishes,
N. Prabhakar
Chartered Structural Engineer
Vasai (E), Pin 401 208
Joined: 19 Jan 2009 Posts: 2329 Location: RAJKOT,GUJARAT, INDIA
Posted: Wed Jul 06, 2016 3:13 pm Post subject:
Dear Er. N. Prabhakar Sir, For Your More Sharp Observation I am uploading Video:- \
Regards, Er. B. V. Harsoda
N. Prabhakar wrote:
Dear Er. Harsoda,
It is amazing that the bus is overhanging from the bridge pier and still standing. It is lucky that over a dozen passengers in the bus were safely evacuated and some of them with minor injuries.
It my opinion, it is a flexural failure of the deck slab between the main piers. It seems to have failed at 1/4 points of the span from end supports, and lot of debris is also seen on ground at these points.
As Er. Pandyaji writes both Govts , Gujarat and Central need to allocate Funds to do Strengthening of Existing Old Bridges. This is a Public Safety Issue.
With best wishes,
N. Prabhakar
Chartered Structural Engineer
Vasai (E), Pin 401 208
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