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第一届交通运输工程国际学术会议

作者： CHEN Da-wei1 and LI Xu-hong2 1School of Transportation Southeast University P.O. BOX 210096 Nanjing 2School of Transportation Southeast University P.O. BOX 210096 Nanjing

In this paper, the author firstly analyzed the content of the system planning of EPTH and its connection modes. After analyzing the connection modes between EPTH and railway transit station, the author proposed the railway transit operation connection model with the objective of minimizing the total interchanging time. Finally, the author analyzed the connection modes between EPTH and conventional public transit. The author also proposed the planning model of conventional public transit hubs with the objective of minimizing passengers’ walking distance, also the method of connecting routes for conventional public transit according to the capability of conventional public transit system.

关键词： external passenger transport hub connection system distribution operation

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Timber-concrete composite bridges:Three case studies

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Journal of Traffic and Transportation Engineering(English Edition) 2018年第6期5卷 429-438页

作者： Massimo Fragiacomo Amedeo Gregori Junqing Xue Cristoforo Demartino Matteo Toso Department of Civil Construction-Architectural and Environmental F.ngineeringUniversity of L'AquilaL'Aquila 67200Italy College of Civil Engineering Fuzhou UniversityFuzhou 350108China College of Civil Engineering Nanfling Tech UniversityNanjing 210800China Maffeis Engineering Solagna 36020Italy

During the last years, timber-concrete composite(TCC) structures have been extensively used in Europe both in new and existing buildings. Generally speaking, a composite structure combines the advantages of both materials employed: the strength and stiffness of the concrete in compression and the tensile strength, lightweight, low embodied energy, and aesthetical appearance of the timber. The concrete slab provides protection of the timber beams from direct contact with water, which is crucial to ensure the durability of the timber beams, particularly when used for bridges. Different types of connectors can be used to provide force exchange between the concrete slab and the timber beam. The choice of a structurally effective yet cheap shear connection between the concrete topping and the timber joist is crucial to make the TCC structures a viable solution that can compete with reinforced concrete and steel structures. In this paper, the possibilities offered by TCC structures for short-span bridge decks are discussed. The technology of TCC structures and the general design rules are illustrated. Three case studies are reported, including a short-span bridge tested in Colorado, USA, with the timber layer being constructed from recycled utility poles and notch connection; a TCC bridge with glulam beams and triangular notches with epoxyglued rebar connectors built in Portugal; and a TCC bridge with glulam beams and rectangular notches built in Germany. All the solutions were found to be structurally effective and aesthetically pleasing. They can all provide a sustainable option for short-span bridges.

关键词： Timber-concrete composite Bridge Design connection system

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