Energy harvesting from vertical pedestrian-induced vibrations of footbridges
The use of advanced sensing systems can facilitate the remote health and serviceability survey of existing infrastructures.In particular,the large number of footbridges built in many countries can greatly benefit from the implementation of smart technological solutions for data transmission and power management.Within this framework,the present paper is concerned with the possibility of using piezoelectric energy harvesters as electrical power source for wireless sensor nodes installed on footbridges.An efficient probabilistic computational framework has been implemented in order to provide preliminary useful results in this regard.Specifically,the vertical dynamic response of a single-span footbridge under multiple walkers is simulated by considering its first mode of vibration only,and the pedestrian load is modelled as a moving sinusoidal force.The scavenging device is a cantilever bimorph with piezoelectric layers made of electrospun PVDF nanofibers.It is assumed that the uncertainties are mainly related to the pedestrians dynamics.Therefore,the randomness of the walkers characteristics is taken into account by means of existing probability distributions whereas the arrival time is modelled through the Poisson distribution.Monte Carlo simulations have been finally performed for a particular case-study in order to estimate the electrical energy generated by the device.
Energy harvesting Footbridge Smart structures Structural monitoring
C.Demartino C.Maruccio G.Quaranta
College of Civil Engineering,Nanjing Tech University,Nanjing,P.R.China Department of Innovation Engineering,University of Salento,Lecce,Italy Department of Structural and Geotechnical Engineering,Sapienza University of Rome,Rome,Italy
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
2159-2168
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）