| Author | Wijewardene, K. A. K. K. |
| Call Number | AIT Thesis no. ST-84-30 |
| Subject(s) | Prestressed concrete beams
|
| 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 | A dynamic analysis model is developed to compute
instantaneous impact deflection of prestressed and reinforced
concrete beams . The maximum instantaneous deflection is
computed. from free vibration of the beam with initial conditions generated from impact analysis. A simple computer program is written for this purpose. For convenience the solution is also
presented in terns of nondimensional parameters. The total deflection comprises of the instantaneous impact deflection and the accumulated dead load deflection. The latter may be computed as the product of the initial dead load deflection and the intensive creep factor.
Experimental results obtained each by Hughes G. and Beeby A.W. and Bate S.C.C. of the Cement and Concrete Association, London, Hussein K. of A.I.T and those by the author are compared with a set of static equivalent models and the proposed dynamic model. In comparison the dynamic model yields superior predictions which closely follow the patterns of the experimental results. Further, the effective moment of inertia formula (Irep) proposed by Loo and Wong of the University of Wollongong, Australia for repeated loading is found to be the most satisfactory moment of inertia for impact loading. For the formula a value of m=1.3 is suggested for deflection computations under impact, where m is the index of the exponential expression for Irep. The instantaneous deflection due to repeated impact of constant severity is found to be not significantly affected by a small number of repetitions. |
| 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) | Worsak Kanok-Nukulchai ;Pichai Nimityongskul
|
| Scholarship Donor(s) | Government of Denmark |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1984 |