Estimation of error in deformed shape determined using double integration of curvature
Loading on beam-like structure generates deformations of its members.Excessive deformations may result in user discomfort,damage to adjacent structural members,and in some cases may affect structural safety.Thus,assessment of deformed shape of beam-like structures and structural members is of particular interest.However,it is difficult to perform a direct on-site long-term monitoring of the deformed shape,mostly due to limitations in technological solutions 1.An alternative is in methods based on parameters that can be monitored in long term and their indirect conversion in deformed shape.That is the case with strain that can be monitored in long terms(e.g.,using series of pairs of fiber optic sensors parallel to centroid line,see Figure 1)and converted in curvature,which in turn can double integrated to obtain the deformed shape 1-2.The challenge of this approach is an accurate evaluation of error in determination of the deformed shape,which depends on the specifications of the monitoring system,geometrical and mechanical properties of the structure,and in particular on the number of sensors used in the monitoring.The aim of this paper is to create a method for evaluation of error in deformed shape determined using double integration of curvature distribution along the beam.This enables design of sensor network,including determination of minimum number of strain sensors needed to achieve desired accuracy in deformed shape.
D.Sigurdardottir B.Glisic
Ramboll,Stockholm,Sweden Department of Civil and Environmental Engineering,Princeton University,Princeton,New Jersey,USA
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
2754-2755
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）