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Diagnostic procedures for assessment of structures

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DIAGNOSTIC PROCEDURES FOR ASSESSMENT

OF STRUCTURES

1. Introduction

Existing structures often require evaluation and YHUL¿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¿FDWLRQRIWKHVHSDUDPHWHUV LQ WKH DQDO\VLV +RZHYHU WKH FRQVHTXHQFHV RI VWUXFWXUDOHYDOXDWLRQFDQFDOOIRUDQH[SHQVLYHUHSDLU UHKDELOLWDWLRQ RU UHSODFHPHQW 7KHUHIRUH WKHUH LV RIWHQDQHHGIRUHLWKHUDPRUHGHWDLOHGDQDO\VLVDQG RUH[SHULPHQWDOYHUL¿FDWLRQRIDQDO\WLFDODVVXPSWLRQV XVLQJGLDJQRVWLFSURFHGXUHV)LHOGWHVWVFRQ¿UPWKDW WKHDFWXDOEHKDYLRURIVWUXFWXUHVDQGLWVFRPSRQHQWVLV RIWHQYHU\GLIIHUHQWWKDQZKDWLVDQDO\WLFDOO\SUHGLFWHG )RUH[DPSOH%DNKWDQG-DHJHU  REVHUYHGWKDWWKH A b s t r a c t 7KHHYDOXDWLRQDQGYHUL¿FDWLRQRIWKHDFWXDOORDGVORDGFDUU\LQJFDSDFLW\DQGSUHGLFWLRQRIWKHUHPDLQLQJOLIHDUHRIWHQ UHTXLUHGIRUH[LVWLQJVWUXFWXUHV 7KHREMHFWLYHRIWKHSDSHULVWRSUHVHQWVRPHRIGLDJQRVWLFWHFKQLTXHVDQGH[DPSOHV RI WKHLU SUDFWLFDO DSSOLFDWLRQV 'LDJQRVWLF HTXLSPHQW VXFK DV VWUDLQ PHDVXUHPHQW GHYLFHV GHÀHFWLRQ PHDVXUHPHQW HTXLSPHQWRSWLFDODQGODVHUGHYLVHVDFFHOHURPHWHUVWLOWPHWHUVDFRXVWLFHPLVVLRQDQGFUDFNFRQWUROHTXLSPHQWDVZHOO DVGLDJQRVWLFSURFHGXUHVKDYHEHHQGHVFULEHG KeywordsDVVHVVPHQWRIVWUXFWXUHVGLDJQRVWLFSURFHGXUHV DFWXDOORDGFDSDFLW\RIEULGJHVLVFRQVLGHUDEO\KLJKHU WKDQZKDWLVSUHGLFWHGE\DQDO\WLFDOPHWKRGV,QFHUWDLQ FDVHVWKLVH[WUDVDIHW\UHVHUYHLQWKHORDGFDSDFLW\FDQ EHXVHGWRSURYHWKDWWKHEULGJHLVDGHTXDWHDQGWKXVWR DYRLGRUGHOD\H[SHQVLYHUHSDLURUUHSODFHPHQW2QWKH RWKHUKDQGDOWKRXJKGLDJQRVWLFWHVWVDUHXVHIXOWRROV LQ VWUXFWXUDO HYDOXDWLRQ WKH\ FDQQRW HQVXUH WKDW WKH SDUWVXEMHFWHGWRWHVWLQJZLOOQRWIDLORUPDOIXQFWLRQ 7KDWLVEHFDXVHHYHU\QRQGHVWUXFWLYHWHVW 1'7 KDV OLPLWDWLRQV DQG HYDOXDWLRQ WHFKQLTXHV VKRXOG QRW EH DSSOLHGRQDURXWLQHEDVLVEHFDXVHRIWKHGLI¿FXOW\RI XVLQJWKHHTXLSPHQWDQGLQWKHLQWHUSUHWDWLRQRIWKH UHVXOWVGXHWRODFNRIVWDQGDUGL]DWLRQ +HOOLHU $EXGD\\HKHWDO 

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2. Needs for diagnostic techniques

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3.1. Strain measurement devices

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3.3. Optical and laser devises

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