Wave method for structural health monitoring:variation of vertical wave velocities in 16 buildings as a function of structural type and building material
Deconvolution interferometry has been receiving increasing attention in structural system identification and health monitoring,due to its robustness when applied to real structures and data,sensitivity to damage and smaller sensitivity to effects of the supporting soil.At its current stage of development,deconvolution interferometry is applied to detect vertically propagating waves,associated with lateral deflection of the structure as whole,identify their velocity along the height,and detect changes in velocity possibly caused by damage.This paper presents results for vertical wave velocities in a set of 16 instrumented buildings in California,identified by an algorithm,developed earlier by the authors for rapid assessment of the structural integrity following an earthquake using data from accelerometers.This algorithm fits a piecewise uniform shear beam in the observed response by matching,in the least squares sense,pulses in impulse response functions.The preliminary set of buildings analyzed comprises mid-rise and high-rise concrete and steel frame structures,which are classified by height,structural material and lateral force resisting system.For this study,an equivalent uniform shear beam is fitted,with the objective to get insight into the distribution of values of the equivalent velocity over different types of structures.The results show that the dependence of the identified wave velocity is the strongest on the type of lateral resisting system(i.e.,if shear walls are present),and the weakest on the building height.
Structural system identification Wave propagation in buildings Structural health monitoring Shear beam Impulse response
M.Rahmani M.I.Todorovska J.R.Grabinski
Department of Civil Engineering and Construction Engineering Management,California State University, Department of Civil Engineering,Tianjin University,Haihe Education Park,Tianjin 300350,P.R.China;Dep
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
2593-2604
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）