Super long-span longitudinal prestressed UHPC box-girder bridge

Author(s) : M. Qiu, X. Shao, H. Zhao, R. Pan, G. Chen
Paper category : Proceedings
Book title : UHPFRC 2017 Designing and Building with UHPFRC: New large-scale implementations, recent technical advances, experience and standards
Editor(s) : F. Toutlemonde & J. ResplendinoT.Ch.
Print-ISBN : 978-2-35158-166-7
e-ISBN : 978-2-35158-167-4
Publisher : RILEM Publications SARL
Publication year : 2017
Pages: 707 - 716
Total Pages : 10
Language : English

Abstract: Based on the superior mechanical properties of the ultra-high performance concrete (UHPC), an innovative longitudinal prestressed UHPC box girder (LPUBG) bridge was proposed to overcome the weaknesses of the conventional long-span prestressed concrete box girder (PCBG) such as numerous cracks, excessive deflection of mid-span and massive self-weight of the superstructure. A trial design of the bridge was conducted to preliminarily evaluate the feasibility of the proposed LPUBG. During the past five years, extensive studies have been performed to investigate the basic performance of the LPUBG, including the torsional behaviour of the box girder, the bi-directional mechanical behaviour of top slab under wheel loads, the shear performance of joint at webs, and the alternative competive span length of LPUBG bridges. In addition, the anchoring structure for the external prestressing tendons was proposed to accommodate to the thin-walled LPUBG. The aforementioned research indicates that the proposed LPUBG is a competitive alternative for long-span bridges owing to its good performance in both static behaviours and favorable economic advantages, especially when considering its life cycle cost.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00