Abstract
Preliminary, numerical analyses of a novel Structural Health Monitoring (SHM) technique are reported. Based on recent developments of new rotation rate (rotation velocity) sensing devices, it is proposed to use the rotational sensors to measure the rotational difference of structural members to indicate plastic hinge development at the early stage. Respective difference between rotations of two adjacent corner nodes during seismic excitation is used to indicate and possibly quantify plastic hinge formation during seismic response of a moment resisting frame. The preliminary numerical analysis leads to a positive conclusion for the application of the rotation rate sensors in ‘on-line’ monitoring of moment resisting frames subjected to strong, damaging seismic ground motions.
Highlights
After a rapid development in mechanical engineering and aeronautics, the SHM (Structural Health Monitoring) techniques are becoming more and more popular in civil engineering
Nonlinear time-history seismic response analysis of a simple moment resisting frame under seismic excitations with increasing intensity is presented with the aim at observing plastic hinge development in selected node of the structure
Taking into account rapid development of sensing techniques of mechanical vibrations of various structures, from airplanes to smartphones, a novel vibration measurement method using rotation rate sensors is tested to be applied in Structural Health Monitoring of building structures during damaging seismic vibrations
Summary
After a rapid development in mechanical engineering and aeronautics, the SHM (Structural Health Monitoring) techniques are becoming more and more popular in civil engineering. What is more they are designed in such a way that the energy released during damaging vibrations is concentrated in specially dedicated areas of these structures, in form of plastic hinges located usually at column/beam joints. The purpose of this paper is to test yet one more area of their potential application, namely their ability to monitor plastic hinge formation (Fig. 1) during damaging vibrations of the structure. For this purpose, a numerical analysis of seismic, inelastic response of a moment resisting frame is carried out and presented in detail
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