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

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4. SEISMIC RESPONSE OF PARTIAL-STRENGTH COMPOSITE JOINTS respectively. As shown in Figure 4.3, longitudinal (φ 12) and transversal (φ 8) reinforcing steel was provided in the concrete portions of the columns and shear studs are used to ensure composite action between the concrete and the steel shapes. The spacing of the stirrups and shear studs varies along the column height. At the base and near the beam-column joints, the stirrups are spaced at 50 mm for both column types. Elsewhere, the spacing is increased to 150 mm. No concrete is used at both floor levels over the depth of the beams. 3500 3500 HEB 260 HEB 260 Main moment resisting frames 3.5 m 3.5 m Secondary beams Figure 4.1. Three-dimensional view of the prototype structure +7.0 +3.5 IPE 300 IPE 300 IPE 300 IPE 300 Figure 4.2. Elevation of a typical 2D Moment Resisting Frame HEB 280 HEB 280 Photos on Figure 4.4 and Figure 4.5 show details of the column bases. The base plate is 40 mm thick and measures 400 mm x 600 mm. It is connected to the HEB 260 HEB 260 7000 103
4. SEISMIC RESPONSE OF PARTIAL-STRENGTH COMPOSITE JOINTS foundations by means of 6 anchor bolts made with φ 32 hooked reinforcing steel bars with their upper ends being threaded. A 150 mm long stub made of a HEB140 profile is welded under the base plate to transfer the horizontal shear to the foundation in the direction parallel to the loading. Base plate stiffeners are installed on each side of the columns to improve fixity about the column strong axis. They are made of 12 mm thick plates that extend over a height of 250 mm. The distance between the underside of the base plate and the top of the first floor slab is 3500 104 Figure 4.3. 2.3 Details of the column bases: a) cross-section of the exterior columns; b) cross-section of the interior columns; c) longitudinal cross-section and side view Figure 4.4. Details of the column bases during fabrication of the Ispra test frame
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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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4. SEISMIC RESPONSE OF PARTIAL-STRE
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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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