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WP 8 - Integration, specimen preparation and calibration. Partner - ZAG (Slovenia). Past experience - ZAG. NDT methods metal detector thermovision ambient vibration MDT methods sampling and laboratory testing of units and mortar in-situ lateral tests of masonry walls DT methods
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WP 8 - Integration, specimen preparation and calibration Partner - ZAG (Slovenia)
Past experience - ZAG • NDT methods • metal detector • thermovision • ambient vibration • MDT methods • sampling and laboratory testing of units and mortar • in-situ lateral tests of masonry walls • DT methods • laboratory lateral/compressive tests of walls cut out from the building
Past experience - Other • NDT methods • Ultra sonic measurements (Faculty for Civil Eng. and Geodesy, University of Ljubljana, Slovenia) • MDT methods • Bond Wrench in-situ tests (University of Newcastle, Australia) • Flat Jack tests (University of Newcastle, Australia) • Scratch tests for determination of the durability of the mortar (University of Newcastle, Australia)
Planned activities of ZAG and IRMA • In-situ tests for determination of lateral resistance of existing historic masonry walls (with application of several NDT and MDT techniques - call for other partner for calibration of their stuff/equipment). • Laboratory tests for determination of lateral resistance of brick masonry walls (with application of several NDT and MDT techniques - call for other partner for calibration of their stuff/equipment).
Case study - Gracarjev turn Castle Miha Tomaževič, Iztok Klemenc, Igor Lavrič, Aleš Žnidarič, Jure Batagelj, Ahmed Hafed Slovenian National Building and Civil Engineering Institute Dimičeva 12, 1000 Ljubljana, Slovenia
Activities of Slovenian National Building and Civil Engineering Institute Execution of in-situ test with assessement of mechanical properties of masonry Measurement of vibration frequencies Preparation of numerical model for identification ofGracarjev turn castle dynamic characteristics Setting up and execution of geodetic surveying
Disposition of cracks after the test Front view Rear view
Verification of seismic resistance of existing masonry buildings • Material properties • In-situ lateral resistance test of walls • Laboratory lateral resistance test of wall cut from the building • Laboratory compressive resistance of wall cut from the building
Lateral load - displacement hysteresis loops Upperpart Lowerpart
2 s s æ ö ( ) 2 + = t - o o ç ÷ f 1 . 1 t 2 2 è ø K = e G 2 æ ö A K 1 h e w ç ÷ - 1.2 h 1.2 E l è ø Assessment of mechanical properties of masonry so = 0.25 MPa t = 0.29 MPa Ke = 150 kNmm Hu = 244 kN du = 5.3 = 0.22 MPa = 239 MPa Ke = 102 kNmm Hu = 249 kN du = 9.9
Mechanical properties of existing masonry (characteristic values)
Dynamic characteristics • Carried in order to assess the values needed to estimate the design seismic loads. • Ambient vibrations off typical buildings.
First natural frequency of vibration of existing masonry buildings
Measurement of vibration frequencies Excitation f=23 Hz First mode f=2.6 Hz Excitation f=23 Hz First mode f=2.6 Hz
First vibration mode f = 4.4 Hz