LSAA Blog Page
Short articles, YouTube videos, blogs or posts found on the internet or posted on the LSAA Facebook page. (in random order)
If any LSAA member has an article or notices something of interest they could email a link and/or text to blogger @ LSAA.org (no spaces)
Just a short note to say that Boxing Day is a day of sporting highlights in Australia - as well as a lot of mahem at the sales.
The first day of the third cricket test at the Melbourne Cricket Ground - The "G" - saw a crowd of some 73,000 watch a slow scoring day on a flat pitch. India batting.
Also Boxing Day is the start of the annual Sydney to Hobart classic ocean yacht race.
From a lightweight structures viewpoint we have the extensive roof structures at the cricket. Also the fast sailing machines with their composite lightweight hulls, prestressed tensile rigging, tensioned fabric sails precisely cut to give a form to generate maximum driving force.
In recent years we have twin rudders and canting keels to maximize the functions of these appendages and in doing so further reduce the weight of the boats.
Some of the super-maxis have very large beams to enhance the planning ability and effects of the crew as ballast.
The progress fly through of Al Bayt Stadium that featured at our 2018 conference. The cladding is nearing completion and the bespoke patterned fabric roof soffit is impressive.
Lightweight Structures such as cablenets and tensioned fabric structures often exhibit relatively large deformations under changing loads.
Rock climbers will rely on the extension characteristics of their ropes to cushion any fall to a deceleration that the body can withstand.
However the following link points to an extreme case of an engineered net to safely catch a dear-devil sky diver from a 7600m free fall without a parachute.
A parachute is also an example of a tensioned fabric structure which adopts a geometric form in response to applied loads (person plus air resistance).
See: https://www.createdigital.org.au/extreme-engineering-luke-aikins-skydive/ where the source of this image is acknowledged.
I recently had a short trip down to Melbourne and took a few pictures of the Arts Centre Spire which was constructed in the late 1970s.
Conceptually, the spire is a sculpture which was intended to indicate the location of something special located under the tall, tapering open lattice structure.
The "upper spire" is from bolted steel tubes with a geometry utilizing tetrahedrons so as to reduce the number of members meeting at a joint. Four joints are at each higher level and these four are rotated by 45 degrees in plan from those at the adjacent levels.
New Canopy Holds Up Adelaide’s International Tennis Position.
There has been a number of curved and interesting footbridges built recently here in Melbourne. See these pics:
The last of these bridges is curved and the load carrying deck (pedestrians and bicycles) creates significant torsion on the main support spine.
This bridge won a LSAA Design Award in 2016.
However, up in Vietnam, a new elevated footbridge in a heavy tourist region has some big hands appearing to support the bridge.
Check it out at this link!!
Credit to "Designboom.com"
"Enter at your own Risk," a trafficable sticky tape sculpture spanning between the walls and the ceiling at the Des Moines Art Centre, USA.
Other guidelines include:
- max 5 people at a time
- no standing, running or jumping
- wear sox etc ...
LSAA member Tensys have been developing tensile aviary structures for the Mandai Project, as part of the ever expanding eco-precinct in Singapore. If you haven't been before the highlight is the Night Safari.
In Sydney for the past 35 or so years there has been great free pre-Christmas Concerts for families.
The event is held in the Domain, and each year the quite large stage and the canopy is erected.
The founding President of the then MSAA (now the LSAA) was largely responsible for developing the canopy concept.
Vinzenz Sedlak started with a lycra model at a scale of 1:100 and envisaged four masts located near each corner of the stage. Diagonal cross cables spanned between the opposite mast heads and a long front edge cable gave an uninterrupted view of the stage area.
Project Highlight: Opening of HOTA (Home of the Arts) at the Gold Coast Cultural Precinct
LSAA Member Contributors: Structural Engineer - Arup, Fabric Supply and Installation - Fabritecture, Fabric Design - Wade Design Engineers
Designers: ARM architecture and Topotek1
What an iconic venue in the Kings Domain in Melbourne! And Happy 60th Birthday!! WOW
This is a unique tensile cablenet structure was designed by Barry Patten of the Architectural firm Yuncken Freeman Brothers, Griffiths and Simpson. Engineering was done by Irwin Johnstone.
Scattered domes, in a beer garden, to warm up in on a beautifully sunny winters day. Darling harbour, Sydney
A BBC article on current and future thinking in robotic construction and construction monitoring
Page 1 of 2