Tongwamen bridge is a half-through, concrete-filled steel tubular (CFST) X-type arch bridge with deck width to span ratio of 1/23·8. It is the first time that arch ribs of the plane truss type have been used in the construction of a long-span CFST bridge in China. The rationality of the design for this type of large-span, narrow bridge is justified using a description and discussion of some key issues related to the bridge design and construction, The paper provides an example of the design of a long-span, narrow, CFST arch bridge.
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