May 16, 2020

Travis Perkins releases the winners of the innovation awards

Travis Perkins plc
Innovation awards
Norman Bell
Group Strategy Director at Travis Perkins plc
Catherine Sturman
2 min
Travis Perkins releases the winners of the innovation awards
A nationwide search for ground-breaking products designed to solve problems in the construction industry has resulted in the naming of six innovation ch...

A nationwide search for ground-breaking products designed to solve problems in the construction industry has resulted in the naming of six innovation champions to watch in 2017. The exciting Travis Perkins Innovation Awards (TPIA), pioneered by the Travis Perkins plc - the UK’s largest distributor of building materials - is the first of its kind for industry.

The successful winners of the first ever TPIA were chosen from over one hundred applicants by an industry panel of judges and announced as: Dr Daniel Simmons, Jonathan Bolton, Jonathan Wood of Johnson Tiles, Mark Singleton of Startlink Systems Ltd, Mark Titley, and Russel Armstrong of RA Tech.

The winners’ products range from Johnson Tiles’ ‘CristalGrip’ an innovative tile fixing system, Russel Armstrong’s ‘Hotun’ the UK's first regulation compatible all in one dry trap tundish, Dr Daniel Simmons’ ‘LeakNet’ a smart solution to water damage prevention, Mark Titley’s ‘Pipe Cone’ a safer and more efficient plastic pipe chamfer tool, Mark Singleton’s ‘Spacelink truss’ made of fiberglass hollow sections, joined without metal or adhesive, that’s as strong as steel but much lighter and rustproof, and Travis Perkins plc employee Jonathan Bolton’s ‘Stay Safe’ multi cordon bag, which makes cordoning off an area safe and quick without the need for traffic cones.

A TPIA winner was chosen from each of the following categories: university-affiliated, problem-solving, inventors, registered businesses and internal colleagues. Going forward the successful applicants will all work closely with Travis Perkins plc to access professional advice, support and funding depending on their specific needs.

Norman Bell, Group Strategy Director at Travis Perkins plc, said: “As a major UK employer with 21 businesses it is important to invest in innovative products and new ideas which help to solve daily problems that are encountered by our customers and the industry as a whole.

We are extremely pleased and proud that the first Travis Perkins Innovation Awards initiative has been so successful resulting in the discovery of so many viable product inventions with potential to make a positive impact on other businesses within the industry.”

Organised by the Innovate team at Travis Perkins plc, the main sponsor of the Travis Perkins Innovation Awards was Marshalls, the UK’s leading innovator of hard landscaping, water management and street furniture products.

The winners’ and their locations:

  • Johnson Tiles - Stoke-on-Trent, Staffordshire
  • RA Tech - Chellaston, Derbyshire
  • Mark Titley - Winterton, Lincolnshire
  • Mark Singleton - Malvern, Herefordshire
  • Jonathan Bolton - Burnley, Lancashire
  • Daniel Simmons - Nottingham, Nottinghamshire

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Jun 17, 2021

Why engineers must always consider human-induced vibration

Vibrations
Engineering
design
Structuralintegrity
Dominic Ellis
3 min
Human-induced vibration can lead to a number of effects upon the structure and its users

Human induced vibration, or more accurately vibrations caused by human footfall, often conjures images of Millennium Bridge-style swaying or collapsing buildings.

But in reality, the ‘damage’ caused by human-induced vibrations is less likely to ruin a structure and more likely to cause discomfort in people. Though not as dramatic as a structural failure, any good engineer wants to make sure the people using their structures, be it bridges or buildings or anything in between, can do so safely and comfortably. This is why human-induced vibration must be considered within the design process.

Resonance v Impulse

There are two ways that human-induced vibrations affect structures: resonant, and impulse or transient response. Put simply, resonance occurs when Object A vibrates at the same natural frequency as Object B.

Object B resonates and begins to vibrate too. Think singing to break a wine glass! Although the person singing isn’t touching the glass, the vibrations of their voice are resonating with the glass’s natural frequency, causing this vibration to get stronger and stronger and eventually, break the glass. In the case of a structure, resonance occurs when the pedestrian’s feet land in time with the vibration.

On the other hand, impulse or transient vibration responses can be a problem on structures where its natural frequencies are too high for resonance to occur, such as where the structure is light or stiff. Here the discomfort is caused by the initial “bounce” of the structure caused by the footstep and is a concern on light or stiff structures.

Engineers must, of course, design to reduce the vibration effects caused by either impulse or resonance.

Potential impacts from human induced vibration

Human induced vibration can lead to a number of effects upon the structure and its users. These include:

  • Interfering with sensitive equipment Depending on the building’s purpose, what it houses can be affected by the vibrations of people using the building. Universities and laboratories, for example, may have sensitive equipment whose accuracy and performance could be damaged by vibrations. Even in ordinary offices the footfall vibration can wobble computer screens, upsetting the workers.
     
  • Swaying bridges One of the most famous examples of human-induced resonance impacting a structure occurred with the Millennium Bridge. As people walked across the bridge, the footsteps caused the bridge to sway, and everybody had to walk in time with the sway because it was difficult not to. Thankfully, this feedback can only occur with horizontal vibrations so building floors are safe from it, but footbridges need careful checking to prevent it.
     
  • Human discomfort According to research, vibrations in buildings and structures can cause depression and even motion sickness in inhabitants. Tall buildings sway in the wind and footsteps can be felt, even subconsciously by the occupants. It has been argued that modern efficient designs featuring thinner floor slabs and wider spacing in column design mean that these new builds are not as effective at dampening vibrations as older buildings are.
     
  • Jeopardising structural integrity The build-up of constant vibrations on a structure can, eventually, lead to structural integrity being compromised. A worse-case scenario would be the complete collapse of the structure and is the reason some bridges insist that marching troops break step before crossing. Crowds jumping in time to music or in response to a goal in a stadium are also dynamic loads that might damage an under-designed structure.

How to avoid it

As mentioned, modern designs that favour thinner slabs and wider column spacing are particularly susceptible to all forms of vibration, human-induced or otherwise, but short spans can also suffer due to their low mass. Using sophisticated structural engineering software is an effective method for engineers to test for and mitigate footfall and other vibrations at the design stage.

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