News

Extension to VSAT’s software released

Vibration Serviceability Assessment Tools (VSATs) was borne out of research at the University of Sheffield, and was developed initially with the capability to determine levels of vibration response due to a single individual on a structure. However, a more realistic representation of real-world conditions requires data for multiple pedestrians at any time.

The calculation of a response factor (R) or VDV value that is generated with multiple pedestrians enables VSATs to generate a more realistic prediction of how a structure will behave, and therefore lower the risk of post-occupancy remediation.

 

Professor James Browhjohn writes the Technology Update in The Structural Engineer

articleThe 3 May 2011 issue of The Structural Engineer features the Technology Update “structural health monitoring: examples and benefits to structure stakeholders.” In the article Professor James Brownjohn from the University of Sheffield reports on a new technological data gathering process that monitors the ‘health’ of structures in real time and provides warnings and alerts should the prognosis change.

Article

“Structural Health Monitoring: The paradigm and the benefits shown in some monitoring projects.”

Prof Alex Pavic at the European Conference on Earthquake Engineering

Prof Alex Pavic at the European Conference on Earthquake Engineering

A presentation at the 14th European Conference on Earthquake Engineering, in Ohrid, Macedonia in which Prof Alex Pavic introduced Structural Health Monitoring (SHM) in the context of large civil engineering structures as having two key elements – automated continuous long-term monitoring and offline assessment. More»

International testing of a 6 lane highway in USA

International Bridge, New Jersey, USA

International Bridge, New Jersey, USA

As part of the US Federal Highways Agency Office of Infrastructure Research and Development’s 20 year “Long Term Bridge Performance (LTBP) Program”, a handful of vibration engineering experts from around the world were invited to International Bridge, New Jersey for comparative assessment of techniques.More»

Dynamic testing of the National Physical Laboratory (NPL) test bridge

NPL testing bridge, Surrey

NPL testing bridge, Surrey

NPL have constructed a test structure, a reinforced concrete bridge, which was typical of 50’s style design, and is situated at a test facility in Teddington, Middlesex.  NPL have invited various research groups to visit the structure and to demonstrate their various methods and technologies.  The structure is then to be systematically damaged and retested to assess the technologies performance with regard to SHM. More»

VSATs software for assessing and visualising floor vibrations serviceability based on first principles.

Modal testing set up for SPS floor.

Modal testing set up for SPS floor.

A papaer at the 2010 joint ASCE Structures Congress in Orlando Florida, by Professor Brownjohn, on the application of VSATs software to floor dynamic performance analysis. The session was well attended by academics and industry professionals, demonstrating that floor vibration serviceability is increasingly important and topical worldwide. Download»