000018575 001__ 18575
000018575 005__ 20170118182229.0
000018575 04107 $$aeng
000018575 046__ $$k2017-01-09
000018575 100__ $$aYang, Yuan-Sen
000018575 24500 $$aImage Analysis Method for Observing Cracks, Strain and Displacement Fields in RC Structural Experiments

000018575 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018575 260__ $$b
000018575 506__ $$arestricted
000018575 520__ $$2eng$$aThis paper presents an image analysis method that is capable of capturing crack distributions, displacement and strain fields in structural testing of reinforced concrete (RC) elements. Traditionally, crack distributions are recorded by manually marking visible cracks in the concrete during an experiment. Strain profiles and displacements of the test specimen are recorded using strain and displacement gauges located at specific measurement locations on the test specimen. The use of such techniques can be time consuming and expensive, requiring significant investment in the cost of the sensors, time for their installation, and large data acquisition systems to collect the data. The use of such measurement systems also requires a priori knowledge of specific measurement locations, something that may not be obvious for large scale experimental testing. Alternatively, the image analysis technique presented herein is a freely available software tool, ImPro Stereo. ImPro Stereo provides a cost effective reliable measurement tool capable of capturing crack progressions, surface strain fields, and displacement time histories in a large-scale structural experiment. To validate the performance of the image analysis method, it is implemented in an experimental program on the in-plane seismic behavior of RC shear walls rehabilitated using fiber-reinforced polymer (FRP) sheets. The image analysis method is shown to be capable of measuring crack distributions and displacement fields over the entire surface of the shear wall with a high degree of accuracy. Strain profiles can be estimated according to the surface displacements. Experimental results from the image analysis method are utilized to develop a better understanding of the behaviour of RC shear walls retrofitted with FRP sheets for earthquake resistance. Potential field applications for the image analysis method in FRP-strengthened RC structures are also discussed.

000018575 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018575 653__ $$areinforced concrete; shear wall; cyclic test; fiber-reinforced polymer; image analysis; ImPro Stereo

000018575 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018575 720__ $$aYang, Yuan-Sen$$iWoods, Joshua$$iLau, David
000018575 8560_ $$ffischerc@itam.cas.cz
000018575 8564_ $$s1526993$$uhttps://invenio.itam.cas.cz/record/18575/files/1741.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1741.
000018575 962__ $$r16048
000018575 980__ $$aPAPER