Structural damage presented by flooding in Queensland

Photograph: Blake Bodycote/EPA per Guardian story link below.

Structural damage resulting from flooding events in Queensland.

Aside from the debris and mud laden sludge that follows a severe flood event what serious structural problems may develop for a home building in Queensland?

Earlier Queenslander style colonial houses that are supported on stumps can be subject to uneven settlement following flood events.  These early period homes were originally constructed with buried timber post stumps hand placed into a hand excavated hole and backfilled with rammed soil backfill all by hand.  This construction technique was applied without site soil testing with mixed results as one would expect – one stump depth may not suit all home sites.

Looking for truth or looking for blame and lawyer fees - Flood dam operations to go to court

Wivenhoe victims deserve their day in court | The Australian

Headley Thomas has noted the courts are needed to sort out how the Dam should have been operated.  I would have thought the best way to get to the truth would have been to allow the Dam manual and the event hydrology to be modeled by professionals outside of the State's jurisdiction and allow their modelling and reporting to answer all of the difficult questions that have arisen.

A court room battle is about finding a party at fault to apportion blame, for the purpose of seeking compensation and paying lawyer fees.  The money would be best spent with the use of independent engineers from Universities in N.S.W or Victoria to seek the truth without fear or favor or "no win no fee" foreshadowing the success of their efforts.

www.floodcommission.qld.gov.au/__data/assets/pdf_file/0011/11720/QFCI-Final-Report-Chapter-16-Operation-of-Wivenhoe-and-Somerset-dams.pdf

Structural failure of shop awning on Gold Coast indicates poor design

A large awning on James Street, Burleigh Heads, collapsed leaving one man dead and several injured. Police question witnesses. Picture: Kit De Guymer - Courier Mail online picture source

This tragic awning failure claimed the life of a local developer Chis Walton and injured 5 others just near Christmas on the 23rd of December 2012.

Shop awnings are typically supported with cantilevering beams projected out from the adjacent shop building.  Other common awning support systems will rely on steel tie rods connected higher up on the shop's external wall to support a projected awning structure above the footpath.

In this case it would appear that two primary cantilevered concrete block masonry beams have been provided for awing support. Awing roof and ceiling cladding has been simply connected to minor spanning beams between a main large steel beam located at the street side external edge.

Photos indicate some surface portions of the concrete blocks have become dislodged from the ends of the cantilevered block masonry beams.  Some corrosion of the steel beam supports is also visible with only two or three minor bolt fixing present.  It is clear this connection has failed.

This failure is likely to be the result of a combination of factors.  Fixture corrosion may have reduced the available bolt shank section capacity. Rusting bolts may have also added expansive forces at the sites of these fixings into the face of the brittle concrete block units.  Once this expansive rust force can cause the surrounding concrete masonry face to crack failure may be expected.

Structural inspection report results in evacuation of hospital services at Mt Isa

"Concrete cancer" has been noted as a cause for down rating the capacity of columns supporting part of the Mt Isa hospital ward areas.

"Concrete cancer" is a common non-engineering deterioration term typically applied to the action of reinforcement corrosion within a concrete building element resulting in the spalling-off of concrete near steel reinforcing bars just below the surface.  Corrosion can be the result of insufficient concrete cover, poor quality concrete and compaction during placement or adverse environmental conditions that have affected the elements exposure.

Patients evacuated as structure found unsound | Townsville Bulletin News

Brisbane storms roll in without warning

Extract from Australian New story Sunday 18th November 2012

"BRISBANE only knew a ferocious storm was upon it yesterday when it was being pounded by almost cyclonic winds and hail, with forecasters issuing a warning too late.

The Bureau of Meteorology's Facebook page has erupted with criticism over why locals weren't warned of a severe storm until five minutes after it hit the inner Brisbane city yesterday morning.

It was the worst storm in 14 months.

Winds up to 90 kilometres per hour lashed the bayside, small hailstones fell all over the icty, four centimetres of rain was dumped on the CBD in just half an hour, and 10,000 lightning strikes tore through the sky.

Cars were submerged in the inner-city suburb of Bowen Hills and trees toppled over throughout the city."

the Australian Brisbane 17/11/12 storm story

Channel 9 News Video Footage

Mini tornadoes spotted near Hobart

Herald Sun story today - "A series of tornadoes have hit Hobart as the weather bureau warns of severe storms in southeast Tasmania.

The Bureau of Meteorology says weak tornadoes have been observed in and around the capital and have been included in a warning about destructive winds, heavy rainfall, flash flooding and large hailstones.

"We have had some reports of hailstones and also tornadoes in the southeastern area," the bureau's severe weather forecaster, Matthew Michael said."

heraldsun news story posted 3.04pm 9 Nov 2012

Powerful electrical storm hits South Australian Capital

www.heraldsun.com.au/news/national/wild-weather-and-more-on-the-way

Keeping in doors or in your car whist this kind of tempest is in progress is good advice. This storm hit on Monday evening 5th of November.
Extract and pictures from the heraldsun news story

 "More than 173,000 lightning strikes had hit the state's electricity network in the 24 hours to 10pm last night.

"No one at SA Power Networks can recall a more extensive and violent lightning storm," SA Power Networks spokesman Paul Roberts said this morning."