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Simplified full-depth precast concrete deck panel systems for accelerated bridge construction 被引量:4
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作者 Zhongguo John Ma Yulin Zhan +2 位作者 Lin Xiao Lungui Li Weiwei Lu 《Journal of Modern Transportation》 2016年第4期251-260,共10页
A simplified full-depth precast concrete deck panel system for accelerating bridge construction (ABC) is introduced and a finite dement analysis (FEA) is con- ducted to investigate the static and dynamic responses... A simplified full-depth precast concrete deck panel system for accelerating bridge construction (ABC) is introduced and a finite dement analysis (FEA) is con- ducted to investigate the static and dynamic responses of this conceptual deck system. The FEA results are compared to those of the traditional full-depth precast concrete deck panel system. The comparison results show that the mechanical behavior of the new deck system is different from that of the traditional deck system. The concrete decks in the new system act as two-way slabs, instead of the one-way slab in the traditional system. Meanwhile, the connections in both the longitudinal and transverse direc- tions may need to accommodate the negative moments. Compared to those in the traditional system, the longitu- dinal nominal stress at middle span increases a lot in the new deck system and the effective flange width varies significantly. In addition, the dynamic results show that the impact factor is influenced by the spacing of connections. Finally, some design concerns of the new deck system are proposed. 展开更多
关键词 Simplified full-depth precast concrete deckpanel systems ~ accelerated bridge construction ~ Structuralresponse
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Precast steel—UHPC lightweight composite bridge for accelerated bridge construction 被引量:1
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作者 Shuwen DENG Xudong SHAO +2 位作者 Xudong ZHAO Yang WANG Yan WANG 《Frontiers of Structural and Civil Engineering》 SCIE EI CSCD 2021年第2期364-377,共14页
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 join... 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. 展开更多
关键词 accelerated bridge construction ultrahigh-performance concrete steel—UHPC composite bridge UHPC girder-to-girder joint
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Lvliang Municipal Government and CHALCO to Accelerate The Construction of Projects
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《China Nonferrous Metals Monthly》 2017年第5期9-9,共1页
On April 7,the Lvliang municipal government and Aluminum Corporation of China Limited(CHALCO)held an in-depth discussion about accelerating the construction of projects such as the 1-million-ton light alloy project and
关键词 Lvliang Municipal Government and CHALCO to Accelerate The construction of Projects
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