Analysis and modelling of the seismic behaviour of high ... - Ingegneria
Analysis and modelling of the seismic behaviour of high ... - Ingegneria
Analysis and modelling of the seismic behaviour of high ... - Ingegneria
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6. SUMMARY, CONCLUSIONS AND FUTURE PERSPECTIVES<br />
performance <strong>of</strong> partial strength bolted extended end plate joints with fillet<br />
welds, which represent an alternative to fully welded connections for use in<br />
<strong>seismic</strong> force resisting moment frames; (ii) to verify in a low-cycle fatigue<br />
regime, <strong>the</strong> feasibility <strong>of</strong> <strong>the</strong> mechanical approach adopted for joints<br />
undergoing monotonic loading, whereby <strong>the</strong> properties <strong>of</strong> a complete joint<br />
are understood <strong>and</strong> obtained by assembling <strong>the</strong> properties <strong>of</strong> its component<br />
parts.<br />
2. Seismic response <strong>of</strong> partial-strength composite joints: in order to evaluate<br />
<strong>the</strong> feasibility <strong>and</strong> effectiveness <strong>of</strong> <strong>the</strong> composite constructions with partial-<br />
strength beam-to-column joints <strong>and</strong> partially encased columns in earthquake-<br />
prone regions, <strong>the</strong> study aimed at calibrating design rules affecting <strong>the</strong><br />
aforementioned components <strong>and</strong> <strong>the</strong> participation <strong>of</strong> <strong>the</strong> concrete slab in <strong>the</strong><br />
relevant transfer mechanisms. The results <strong>of</strong> this project led to improved<br />
design procedures for composite constructions (Section 7, Part 1 <strong>of</strong> EC8,<br />
2002).<br />
3. Seismic <strong>behaviour</strong> <strong>of</strong> RC columns embedding steel pr<strong>of</strong>iles: this last<br />
research activity was part <strong>of</strong> ano<strong>the</strong>r European Project titled Two Innovations<br />
For Earthquake Resistant Design - INERD Project, that deals with <strong>the</strong><br />
improvement <strong>of</strong> <strong>the</strong> resistance <strong>and</strong> ductility <strong>of</strong> reinforced concrete (RC)<br />
structures using <strong>the</strong> performance <strong>of</strong> structural steel pr<strong>of</strong>iles. The general<br />
objective was to establish a new st<strong>and</strong>ard constructional rule able to improve<br />
<strong>the</strong> <strong>seismic</strong> safety <strong>of</strong> reinforced concrete structure, without great changes <strong>of</strong><br />
traditional constructional practice. This rule consists in promoting one<br />
specific construction measure for lower storeys <strong>of</strong> reinforced concrete<br />
structures, by which steel pr<strong>of</strong>iles would be encased in RC columns in order<br />
to provide <strong>the</strong>m with a basic reliable shear <strong>and</strong> compression resistance.<br />
6.2 Conclusions <strong>and</strong> future perspectives<br />
6.2.1 Seismic <strong>behaviour</strong> <strong>of</strong> bolted end plate beam-to-column steel joints<br />
A general test programme was presented, comprising partial strength bolted<br />
extended end plate joints with fillet welds <strong>and</strong> component parts, which represent an<br />
alternative to fully welded connections for use in <strong>seismic</strong> force resisting moment<br />
frames. The main results indicate that partial strength bolted extended end plate<br />
connections are suitable for use in <strong>seismic</strong> moment resisting frames. They<br />
represent an alternative to fully welded connections, as toge<strong>the</strong>r with <strong>the</strong> column<br />
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