Behavior of Steel Plate Girders with Deep Section under Dynamic Effect

Hanady El Dehemy

doi:10.35940/ijeat.a1672.1010120

Abstract

Having a minimum mass, equal-sized flanges and no web stiffeners is the most economical plate girder to fabricate. As with rolled I-sections, for a given section modulus a section with a greater depth will have a lower mass than one with a smaller depth, except in some instances where a thicker web is required in the deeper section. A wider flange plate to resist the buckling tendency may be necessary to use, when the compression flange is laterally unrestrained, but this will add to the cost because of the more difficult assembly procedure. In order to arrive at a minimum-mass cross section as much as possible of the material should be located in the flanges and as little as possible in the web, consistent with shear requirements. There is usually an advantage, however, in using a somewhat thicker web in order to reduce welding distortion, or to avoid the use of or number of stiffeners. It can be shown that for a given web depth to thickness ratio the minimum-mass cross section is that in which the area of the two flanges combined equals that of the web, i.e. 2Af = Aw.An important consideration in cost reduction is the use of preferred plate widths and thicknesses for the flange and web elements.

Highlights

TO carry heavy loads on relatively long spans, a flexural member is required as a girder
The method is based on the calculation of the effective cross-section characteristics, and the shear resistance is derived from a tension field model in the web
ABAQUS software provides a good analysis for design various structural systems

Summary

INTRODUCTION

TO carry heavy loads on relatively long spans, a flexural member is required as a girder. Depending on the magnitude of the loads and the span length, these girders may be factory manufactured rolled cross sections or built-up sections. A flexural cross section made up of a number of elements can be describing by the term girder They are generally considerably deeper than the deepest rolled sections and usually have webs which are relatively thinner than rolled sections. The difference between beams, built-up sections and plate girders as follow: The beams are normally used for shorter spans and usually consist of ready made available rolled section. The additional requirement of moments are compensated by using additional plates connected to the flanges of available I, or channel sections and they are called as built up beams. The distance between centers of gravity of the top flange and bottom flange is defined as effective depth, which is approximately taken as depth over angles

REVIEW CRITERIA

FINITE ELEMENT ANALYSIS

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CONCLUSION