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Computers and Concrete
  Volume 29, Number 3, March 2022 , pages 161-168
DOI: https://doi.org/10.12989/cac.2022.29.3.161
 


Parametric study on precast prestressed concrete double-tee girder for rural bridges
Dinh Hung Nguyen, Hong Nghiep Vu and Thac Quang Nguyen

 
Abstract
    Bridges using double-tee (DT) girders from 12 m to 15 m are one of the good choices to improve accessibility in rural areas of the Mekong River Delta. In this study, nonlinear finite element method (FEM) analysis was conducted with different constitutive laws of materials. The FEM analysis results were compared to experimental results to confirm the applicability of the constitutive laws of materials for DT girders. A parametric study through FEM analysis was then conducted to investigate the effect of span lengths, top flange depths, and a number of prestressing tendons on the capacity of DT girders in order that propose DT girders for rural bridges. Parametric results showed that the top flange depth of a DT girder for rural bridges could be 120 mm. The DT girder with a span length of 12 m or 13 m could be used 16 tendons, while the DT girder with a span length of 14 m or 15 m could be set up with 20 tendons. The prestressed concrete DT girders based on FEM results can be suggested for the construction of rural bridges.
 
Key Words
    compressive strength; concrete damage plasticity; double-tee girder; prestressed concrete
 
Address
Dinh Hung Nguyen: Department of Civil Engineering, International University-Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam; Vietnam National University Ho Chi Minh City, Vietnam
Hong Nghiep Vu: Department of Civil Engineering, Van Lang University, No. 45, Nguyen Khac Nhu St., District 1, Ho Chi Minh City, Vietnam
Thac Quang Nguyen: University of Transport and Communications, Campus in Ho Chi Minh City,
No. 450-451 Le Van Viet St., Tang Nhon Phu A Ward, Thu Duc City, Ho Chi Minh City, Vietnam
 

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