A reassessment of the effective width of T-beams | |
| Author | Tjitra Djaja Sutandi |
| Call Number | AIT Thesis no. ST-84-27 |
| Subject(s) | Prestressed concrete beams Finite element method--Computer programs |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | In an attempt to investigate the behavior of T-beams with a higher degree of accuracy, a three dimensional finite element approach is adopted in which the beam is discretized into solid elements. Analyses are carried out using FEAP, a general finite element package developed in Berkeley. A total of 81 simply supported beams with varying span, spacing between beams, flange thickness, width of s t e m and overall depth have been analysed under three loading conditions . They are concentrated load at mid-span, third-point loading as well as uniformly distributed load. From the finite element results the effective width of these beams were computed and tabulated. It is obvious that for a given beam the effective width varies with the loading condition. The value being the smallest for concentrated load at mid-span, followed by the third-point loading case, and finally the uniformly distributed load. Multiple stepwise regression analyses a re carried out with these effective width data, resulting in three empirical formulae for the three loading conditions . Pearson's correlation analyses are then performed. It is found that the relationship between the empirical formulae and the finite element results are strong. Comparisons are also made between the empirical formulae and the code recommendations or eleven countries and Comite European du Beton ( 1976) . Results s how that t he recommendation s for concentrated load cases in general overestimate the effective width for beams having relatively short spans thus giving unsafe results. On the other hand, the Italian code always underestimates the effective widths regardless of loading. |
| Year | 1984 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Loo, Yew-Chaye |
| Examination Committee(s) | Pichai Nimityongskul ;Wireland, Martin |
| Scholarship Donor(s) | D.A.A.D .,Germany |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1984 |