By Damien L. Keogh
The definitive textual content within the box of Bridge Deck behaviour and research Bridge Deck research is an important reference for civil and structural engineers.It offers bridge designers with the data to appreciate the behaviour of bridge decks, to be accustomed to, and to appreciate a number of the numerical modelling options, to understand which procedure is such a lot ideal. The booklet covers the grillage analogy, dedicates a bankruptcy to the modelling and research of indispensable bridge kinds and likewise presents tips of the appliance of the finite aspect approach.
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Extra resources for Bridge Deck Analysis
Methods of analysing to determine the effects of the equivalent loads are described in Chapter 3. 1: Differential temperature I The bridge beam illustrated in Fig. 3 is subjected to the differential increase in temperature shown. It is required to determine the effects of the temperature change if it is simply supported on one fixed and one sliding bearing. The coefficient of thermal expansion is 12×10−6 and the modulus of elasticity is 35000 N/mm2. The applied temperature distribution is converted into the equivalent stress distribution of Fig.
Other types of loading which may occur but which are not considered here are the effects of shrinkage and creep, exceptional loads (such as snow) and construction loads. Another source of loading is earth pressure on substructures. This is considered in Chapter 4 in the context of integral bridges. Three codes of practice are referred to in this chapter, namely, the British Department of Transport standard BD37/88 (1988), the draft Eurocode EC1 (1995) and the American standard AASHTO (1995). Dead and superimposed dead loads consist of permanent gravity forces due to structural elements and other permanent items such as parapets and road surfacing.
Wind tends not to be critical for typical road bridges that are relatively wide but can be significant in elevated railway viaducts when the vertical projected surface area is large relative to the bridge width. Both the British and the American standards specify a simple conservative design wind loading intensity which can be safely used in most cases. More accurate (and complex) methods are also specified for cases where wind has a significant effect. Prestress is not a load as such but a means by which applied loads are resisted.
Bridge Deck Analysis by Damien L. Keogh