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

4. SEISMIC RESPONSE OF PARTIAL-STRENGTH COMPOSITE JOINTS
Figure 4.20) and strain gauges were positioned in order to investigate the transfer
mechanisms from the composite beam to the column; in detail the shear
deformation of the web panel and the strain distribution in the concrete slab and in
the reinforcing bars were well monitored.
130
Ts.sup.sx
Tc.sup
Tb.sup.sx
Tc.inf
Tdia.2
Tdia.1
Tb.sup.dx
Tb.inf.sx Tb.inf.dx
Ts.sup.dx
Ts.inf.sx Ts.inf.sx
Figure 4.20. LVDT Transducer in the joint
4.8.2 Specimen behaviour and test results
The test results of the four specimens are shown as load-deformation
relationships. The number of peaks indicates the cycle numbers. The hysteresis
diagrams, characterizing the overall behaviour of the specimen and the behaviour
of its components, are as follows:
• M-φ hysteresis diagram of the overall behaviour of the specimen;
• M-θ hysteresis diagram of composite beam connection rotation;
• V-γ hysteresis diagram of web panel zone distortion.
Interior Complete Joint CJ-INT
For this specimen both the monotonic and the cyclic test were performed. In the
following Figure 4.21, Figure 4.22 and Figure 4.23 the moment vs. plastic rotation
of a beam-column assembly, the moment vs. plastic rotation of the composite
beam connection and the shear vs. plastic distortion of the column web panel are
shown.