Theoretical and Experimental Study on Buried Joint Systems


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Title: Theoretical and Experimental Study on Buried Joint Systems

Author(s): P. Giannattasio, L. Alifano, M. Crispino, B. Festa, and V. Nicolosi

Publication: Special Publication

Volume: 164


Appears on pages(s): 113-130

Keywords: bridges (structures); fatigue (materials); joints (junctions); strain gages; structural design; Structural Research

Date: 11/1/1996

Buried joints are frequently used in small and medium span bridges because they are serviceable and comfortable. This paper illustrates a theoretical method and an experimental equipment setup for the study of buried joint systems, in particular to evaluate the influence of some parameters that affect their fatigue life, with the aim of supplying references for the design of new optimal buried joint systems. The theoretical analysis is developed by applying a calculation method set up at the Department of Transportation Engineering of the University of Naples "Federico II" (D. I. T.). The results of this analysis are discussed; some interesting indications for the design of buried joints based on these results are given. As for the experimental study, this paper also describes a prototype equipment for testing the buried joint systems, evaluating their capability to reduce the deformations and to increase, therefore, the fatigue life. The equipment had been purposely designed and set up at D. I. T. Some experimental tests have been conducted using this equipment. The results of the tests have confirmed the validity of the design method developed.