Analysis and modelling of the seismic behaviour of high ... - Ingegneria

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4. SEISMIC RESPONSE OF PARTIAL-STRENGTH COMPOSITE JOINTS REACTION FORCE (kN) 100 80 60 40 20 0 -20 -40 -60 -80 Experimental Numerical -150 -120 -90 -60 -30 0 30 60 90 120 150 DISPLACEMENT (mm) Figure 4.39. Experimental and predicted force vs. displacement of CJ-EXT specimen (a) (b) (c) (d) Figure 4.40. Evolution of the principal stresses of compression in the slab under sagging bending moment for a top displacement equal to: (a) 50 mm; (b) 75 mm; (c) 100 mm; (d) 125 mm 145
4. SEISMIC RESPONSE OF PARTIAL-STRENGTH COMPOSITE JOINTS For sagging bending moment, as depicted in Figure 4.40, the localization of the stresses in the front of the column flange is evident. Moreover, under hogging bending moment, the model clearly shows the distribution of the stresses in the slab, due to the transfer of forces from the reinforcing bars in tension to the partially encased column. Such distribution explicates well the cracks in the concrete slab observed during the test, as depicted in Figure 4.41. 146 (a) (b) Figure 4.41. (a) Numerical distribution of the principal stresses of compression in the slab under hogging bending moment; (b) cracks in the concrete slab due to the transfer of force from the concrete slab to the column during the experimental test Moreover, the model captures very well the deformed configuration of the joint, with localization of plastic hinges in the flanges of the steel column, in correspondence of the stiffeners and the yielding of the end plate in tension, as depicted in Figure 4.42. Moreover, the stress concentration due to the mobilization of the column web panel in shear is evident in the panel zone. Figure 4.42. Plastic hinges in the flanges of the steel column and yielding of the end plate in tension
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Dipartimento di Ingegneria Meccanic
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UNIVERSITÀ DEGLI STUDI DI TRENTO D
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Ai miei genitori
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INDEX 1 INTRODUCTION...............
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INDEX iii 4.10.3 Results of the PsD
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1.1 Introduction 1 1 INTRODUCTION I
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1. INTRODUCTION imposes precise con
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1. INTRODUCTION joints whilst 2D mo
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7 2 DUCTILITY AND SEISMIC RESPONSE
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2. DUCTILITY AND SEISMIC RESPONSE O
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3. SEISMIC BEHAVIOUR OF BOLTED END
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5. SEISMIC BEHAVIOUR OF RC COLUMNS
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6. SUMMARY, CONCLUSIONS AND FUTURE
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Analysis and modelling of the seismic behaviour of high ... - Ingegneria

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