Precast steel–UHPC lightweight composite bridge for accelerated bridge construction
Shuwen DENG , Xudong SHAO , Xudong ZHAO , Yang WANG , Yan WANG
Front. Struct. Civ. Eng. ›› 2021, Vol. 15 ›› Issue (2) : 364 -377.
Precast steel–UHPC lightweight composite bridge for accelerated bridge construction
In this study, a fully precast steel–ultrahigh performance concrete (UHPC) lightweight composite bridge (LWCB) was proposed based on Mapu Bridge, aiming at accelerating construction in bridge engineering. Cast-in-place joints are generally the controlling factor of segmental structures. Therefore, an innovative girder-to-girder joint that is suitable for LWCB was developed. A specimen consisting of two prefabricated steel–UHPC composite girder parts and one post-cast joint part was fabricated to determine if the joint can effectively transfer load between girders. The flexural behavior of the specimen under a negative bending moment was explored. Finite element analyses of Mapu Bridge showed that the nominal stress of critical sections could meet the required stress, indicating that the design is reasonable. The fatigue performance of the UHPC deck was assessed based on past research, and results revealed that the fatigue performance could meet the design requirements. Based on the test results, a crack width prediction method for the joint interface, a simplified calculation method for the design moment, and a deflection calculation method for the steel–UHPC composite girder in consideration of the UHPC tensile stiffness effect were presented. Good agreements were achieved between the predicted values and test results.
accelerated bridge construction / ultrahigh-performance concrete / steel–UHPC composite bridge / UHPC girder-to-girder joint
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
MTPRC. General Specifations for Design of Highway Bridges and Culverts, JTG D60-2015. Beijing: China Communications Press Co., Ltd, 2015 |
| [17] |
MTPRC. Specifications for Design of Highway Steel Bridge, JTG D64-2015. Beijing: China Communications Press Co., Ltd, 2015 |
| [18] |
MTPRC. Specifications for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts, JTG 3362-2018. Beijing: China Communications Press Co., Ltd, 2018 |
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
AFGC-SETRA. Ultra High Performance Fibrereinforced Concretes. Recommendations. Paris: AFGC&SETRA Working Group, 2013, 1–175 |
| [23] |
|
| [24] |
|
| [25] |
MOHURD. Reactive Powder Concrete, GB/T 31387-2015. Beijing: Standardization Administration, 2015 |
| [26] |
|
| [27] |
|
| [28] |
European Committee for Standardization (CEN). European Prestandard ENV 1991-4. Eurocode 3: Design of Steel Structures. Brussels: CEN, 1999 |
| [29] |
|
| [30] |
|
| [31] |
MOHURD. Code for Design of Concrete Structures, GB50010-2010. Beijing: Ministry of Construction People’s Republic of China, 2010 |
| [32] |
International Federation for Structural Concrete. Fib Model Code for Concrete Structures 2010. Switzerland: Federal Institute of Technology Lausanne-EPFL, 2010 |
| [33] |
American Concrete Institute (ACI). Building Code Requirements for Reinforced Concrete (ACI 318M-89) and Commentary-ACI 318RM-89. ACI, 1990 |
Higher Education Press
/
| 〈 |
|
〉 |