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Article: Span ratios in bridges constructed using a balanced cantilever method.
- Article from:
- Construction and Building Materials
- Article date:
- December 1, 2004
- Author:
CopyrightCOPYRIGHT 2004 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Abstract
This paper introduces a relation to determine the span ratio between exterior and interior spans, which is required in the preliminary design stage of bridges constructed by balanced cantilever method, On the basis of the numerical results obtained by rigorous time-dependent analyses and by the simple equations introduced in the companion paper, the moment distribution along the spans and its variation with the construction sequence are reviewed, and a recommendation for a rational design is suggested. First, a relation for the initial tendon force is derived on the basis of an assumption that no vertical drift occurs at the far end of a cantilever beam ...