Additional Shear Stresses in Webs of Segmental Concrete Bridges due to Anchorage of Cantilever Tendons

He, Zhi‐Qi; Tang, Minghao; Xu, Tao; Liu, Zhao; John, Zhongguo

doi:10.1061/(asce)be.1943-5592.0001750

Cited by 5 publications

(1 citation statement)

References 16 publications

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“…The timedependent factor (creep and shrinkage) was the most suspicious reason, researchers focus their attention on this field [5][6][7]. In recent years the focus of the research has shifted to calculation methods [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Stress Redistribution Study and Material Inelasticity and Prestress Loss Coupling Effect in Segmental Concrete Bridges

He¹

2023

Preprint

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The reason for excessive multidecade deflections is still unclear after 70 years of the cantilever method that has been applied in building large-span segmental concrete bridges. The failure of the Koror-Babeldaob bridge gives the author a clue that the reason might be the boundary condition. The asymmetric properties of the bearing and prestress tendon draw the author’s attention. To understand the process of stress redistribution, the virtual stiffness method which is derived from the principle of minimum potential energy was created, and the phenomenon the author suggested named Material Inelasticity and Prestress Loss Coupling Effect is discovered. The unexplainable excessive deflection and prestress loss are found in the new load model. The calculation of excessive deflection is discussed. The new model fits the experience well. The optimization design methods and construction key points are proposed.

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