ASCE will be sunsetting the Civil Engineering Database (CEDB) in the coming months. We encourage you to start using the ASCE Library to perform content searches. In the ASCE Library, you can save your search results as well as receive email content alerts when new content relevant to your area of interest is published. Try it out today at https://ascelibrary.org.

 

Impulse Effect on Redundancy of a Tied-Arch Bridge

by Leon L-Y. Lai, (A.M.ASCE), Rathyeon Engineers &, Constructors, Langhorne, United States,



Document Type: Proceeding Paper

Part of: Computing in Civil Engineering

Abstract:

This paper studies the redundancy of a tied-arch bridge using a 3-dimensional finite element computer model. By using static incremental loading simulation, a tied-arch bridge designed for the HS20 loading is able to carry the full dead load plus a live load of 130% HS20 loading even when one of the two ties is totally fractured. However, if the impulse effect due to sudden fracture of a tie is taken into consideration, the dynamic magnification factor is much higher than that commonly used in the static incremental study. The after-fracture dynamic behavior of the structure and the applicability of the AASHTO impact factor formula are also studied.

Subject Headings: Static loads | Computer models | Finite element method | Dynamic loads | Arch bridges | Live loads | Impulsive loads

Services: Buy this book/Buy this article

 

Return to search