Using Steel Grating Platform as Stabilization for Steel Primary I-Beam
Chen, Nuoya (2020)
2020
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2020052413194
https://urn.fi/URN:NBN:fi:amk-2020052413194
Tiivistelmä
One of the basic steps of steel beam design is to define the effective lateral-torsional buckling length of structural elements. According to different kinds of supports of the beam, the effective buckling length can be calculated sketchily by using Euler’s formula. However, the stiffness of steel gratings together with secondary beams can resist the lateral-torsional buckling of platform primary beams and affect their effective buckling lengths.
The purpose of this Bachelor’s thesis was to build and analyse various structural models of typical steel platforms to determine the effective buckling lengths of platform narrow flange primary I-beams. The results show that gratings and secondary beams provide significant lateral restraint to narrow flange primary I-beams and reduce their effective buckling lengths. But the restraining effects from grating is limited by the properties of beams, stiffness of beam to beam connection and the size of the grating platform. Some additional tests of wider flange primary I-beams were also calculated as a reference to solve how effective stabilization grating platform can provide for wider flange primary beams.
The purpose of this Bachelor’s thesis was to build and analyse various structural models of typical steel platforms to determine the effective buckling lengths of platform narrow flange primary I-beams. The results show that gratings and secondary beams provide significant lateral restraint to narrow flange primary I-beams and reduce their effective buckling lengths. But the restraining effects from grating is limited by the properties of beams, stiffness of beam to beam connection and the size of the grating platform. Some additional tests of wider flange primary I-beams were also calculated as a reference to solve how effective stabilization grating platform can provide for wider flange primary beams.