News bulletin 48:
News bulletin 48: 5 Dec 2017


Many pedestrian bridges have experienced dramatic vibrations and wobbling when crowds have tried to cross them, e.g. the London Millennium Bridge began to sway on its opening day in 2000 and had to be closed while the Squibb Park Bridge in NY bounced sideways as pedestrians crossed in 2014, not reopening until this year. This movement could be reduced by using biomechanically inspired models of pedestrian response to bridge motion and a mathematical formula to estimate the critical crowd size at which bridge wobbling begins, according to a study by Georgia State University.

Institute Silver Member Cardno has received an Urban Design Award along with joint entrants John Graham and BVN for the Gold Coast Sports and Leisure Centre. Cardno provided civil engineering, hydrology, landscape and geotechnical consulting. Other consultants on this project included Bligh Tanner, ARUP, Hansen Yuncken, and Aurecon.

Following the failure of the Oroville Dam spillway in the US earlier this year, construction engineering firm Kiewit was hired by California’s Department of Water Resources (DWR) to rebuild and reinforce it. However hairline cracks were detected in October when curing coverings places over the erosion-resistant concrete slabs were removed. The DWR investigated and explained the cracks were the result of “some of the design elements” and “are not abnormal” however not everyone agrees.

A development application has been lodged for a 55-storey commercial tower between George and Pitt Streets in Sydney by new Institute Gold Member, Lendlease. The development will include a mixed-use podium, public spaces and expanded laneways. Lendlease has also partnered with one of Japan’s largest property companies to work on Melbourne Quarter’s first residential building, the 44-storey East Tower.

On the Forrestfield Airport Link in Perth work is underway at Wright Crescent to build an emergency egress shaft. 35 linear metres of D-walls that are up to 36 metres deep are expected to be constructed in two months.

Image: Thomas Porostocky via Georgia State University.