| 1. |
- Andrade, Pedro, et al.
(författare)
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Design and execution of a 3D modular building
- 2014
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Ingår i: Eurosteel 2014. - Brussels, Belgium : European Convention for Constructional Steelwork, ECCS. - 9789291471218 ; , s. 103-104
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Konferensbidrag (refereegranskat)
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| 2. |
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| 3. |
- Heistermann, Tim, et al.
(författare)
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Initial Stiffness of Reverse Channel Connections
- 2014
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Ingår i: Eurosteel 2014. - Brussels : European Convention for Constructional Steelwork, ECCS. - 9789291471218
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Konferensbidrag (refereegranskat)abstract
- The robustness of a structure in a fire situation greatly depends on the rotational capacity of the connection region. High rotational capacity is required at elevated temperatures since the steel beams lose their bending stiffness and exhibit increasingly large deflections under constant load. Beam deflections result in increasing rotations at the supports and may lead to collapse due to connection failure. The reverse channel has been proposed as a practical alternative to assemble beams to tubular columns. In a simple implementation, the bending moment generated in the joint due to rotation of the beam may be neglected; however, research efforts are being attempted to quantify the level of constraint. The typical arrangement of the connection type consists of a reverse channel with its flanges welded onto the face of concrete-filled tubular columns and the web bolted to the endplate of a beam. Thicknesses and depths of the reverse channel determine the level of rotational restraint at high temperature. The reverse channel has the ability to undergo catenary deformation in the tensile zone due to the applied rotation at the support and similarly it is relatively ductile in the compression zone. Overall, the reverse channel connection response is rather ductile in terms of its ability to undergo large rotational deformation as long as bolt failure is avoided through proper design.Various tests have been performed to study the behaviour of this type of connection such as full scale buildings, sub-frames, isolated joints and individual sections. The aim of these tests was to capture the connection behaviour in relation to other structural components in fire. This paper, however, focuses on the derivation and verification of analytical models to assess the initial stiffness of reverse channel/partial-depth endplate connections. The results from finite element analyses have been utilized to validate analytical models that describe the behaviour of this type of connection at ambient and elevated temperature. Insight into the analytical models provides proper background to a structural designer to estimate the initial stiffness and understand the behaviour of the reverse channel in the connection.
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| 4. |
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| 5. |
- Manoleas, Panagiotis, et al.
(författare)
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The Crocodile Nose Connection : An Aesthetically Appealing Joint for CHS
- 2014
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Ingår i: Eurosteel 2014. - Brussels, Belgium : European Convention for Constructional Steelwork, ECCS. - 9789291471218 ; , s. 65-66
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Konferensbidrag (refereegranskat)abstract
- The work carried out at LTU as a part of preparation for the experimental program of the so called Crocodile Nose (CN) connection, is presented. This work is performed in the framework of the RFCS-funded project "High Strength Steel Long Span Structures" (HILONG) that focuses on the development of applications of higher-strength steel grades for the longer spans. The advantage of this connection is in avoiding the classical abrupt right-angle termination of the CHS which, along with the protruding gusset plate, results in what is regarded by many architects as aesthetically unappealing joint. In a CN connection, the CHS member end is obliquely bevelled along two planes symmetric to its axis. On the lips of the resulting semi-elliptic cut-offs, appropriately cut cover plates are fillet-welded; past the tip of the member these are inflected and extend in parallel to the member axis forming a gap wherein a gusset plate is inserted. The inflected plates are bolted to the gusset thus securing the connection of the CHS to the other side without any eccentricity. Preliminary FE results of the crocodile nose experiments are shown.
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