By Michael D Kotsovos
This booklet offers a mode which simplifies and unifies the layout of strengthened concrete (RC) buildings and is appropriate to any structural aspect lower than either general and seismic loading stipulations. The proposed procedure has a valid theoretical foundation and is expressed in a unified shape appropriate to all structural participants, in addition to their connections. it truly is utilized in perform by utilizing easy failure standards derived from first rules with out the necessity for calibration by using experimental info. the tactic is in a position to predicting not just load-carrying skill but in addition the destinations and modes of failure, in addition to safeguarding the structural functionality code specifications.
In this ebook, the thoughts underlying the strategy are first provided for the case of easily supported RC beams. the applying of the strategy is steadily prolonged with a view to conceal all universal structural components. for every structural aspect thought of, proof of the validity of the proposed procedure is gifted including layout examples and comparisons with present code requirements. the tactic has been came upon to supply layout ideas which fulfill the seismic functionality specifications of present codes in all circumstances investigated up to now, together with structural contributors akin to beams, columns, and partitions, beam-to-beam or column-to-column connections, and beam-to-column joints.
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Extra info for Compressive Force-Path Method: Unified Ultimate Limit-State Design of Concrete Structures
Barnard PR (1964) Researches into the complete stress-strain curve for concrete. Fenwick RC, Paulay T (1968) Mechanisms of shear resistance of concrete beams. J Struct Div. Taylor HPJ (1974) The fundamental behaviour of reinforced concrete beams in bending and shear. Taylor HPJ (1969) Investigation of the dowel shear forces carried by tensile steel in reinforced concrete beams. Collins MP, Mitchell D (1980) Shear and torsion design of prestressed and non-prestressed concrete beams. Schlaich J, Schafer K, Jennewein M (1987) Toward a consistent design of structural concrete.
3 Proposed method for calculating flexural capacity (b) Calculation of flexural capacity The method proposed for the calculation of flexural capacity is a further simplified version of the method proposed in Ref. 3 which shows that it is essentially the method adopted by the current European code (EC2 ) modified so as to allow for the development of triaxial stress conditions in the compressive zone.
This portion includes, on the one hand, the two end regions of the beam which extend to the deep inclined crack forming closest to the supports and, on the other hand, the relatively narrow strip, with varying depth, which forms between the crack tips and the upper face, and connects the above two regions. As will become apparent in what follows, a characteristic feature of the above narrow strip is its very small depth which, as indicated in the figure, is, in localized regions (and, in particular, in the region including the tip of the deepest inclined crack), a very small percentage of the total beam depth.