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Overview of monitoring systems used during construction and permanent structural monitoring

The construction industry is constantly looking for ways to expedite construction time and minimize cost. Both of these goals are becoming more difficult to achieve due to the increasing number of construction jobs in highly populated, urbanized areas. Monitoring systems have become common in the construction field, from helping in construction phasing to maintaining design parameters, instrumentation seems to have earned a permanent place in the construction process. Just as monitoring is essential in the field of construction it may also become an integrated part of structures over long periods of time. Load cells are used for years to make sure tension members keep their pre-tension characteristics, and strain gauges have been successfully used for over six years in One Financial Center to aid in the assessment of the building's behavioral reactions to the extensive construction work from the Central Artery Project. New technologies that can make permanent and continuous monitoring possible are being researched and are the topic of many articles, speeches and studies. It seems inevitable that technology will soon enable us to observe the behavior of structures at any point in time and from any location. But with this wealth of information comes a constant stream of responsibility. This paper investigates the monitoring technology available for use during construction and the technology being researched for use in a permanent basis, as well as the different aspects inherent to continuous information such as liability and data management. Even though it is clear that within the next few years the technology will be available to continuously monitor a structure, this analysis raises the question of whether we will be able to change our way of practicing to accommodate technology.