American Society of Civil Engineers

Inelastic Behavior of a Continuous Composite Box-Girder Bridge with Prefabricated Slabs

by Chang-Su Shim, (Department of Civil Engineering, Chung-Ang University, Ansung-Si, Korea E-mail:, Hyung-Keun Ryu, (School of Civil, Urban & Geosystem, Seoul National University, Seoul, Korea E-mail:, Chul-Hun Chung, (Deptartment of Civil and Environmental Engineering, Dankook University, Seoul, Korea E-mail:, Seok-Goo Youn, (Deptartment of Civil Engineering, Seoul National University of Technology, Seoul, Korea E-mail:, and Sung-Pil Chang, (School of Civil, Urban & Geosystem, Seoul National University, Seoul, Korea E-mail:
Section: Composite Bridges, pp. 57-66, (doi:

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Document type: Conference Proceeding Paper
Part of: Composite Construction in Steel and Concrete V
Abstract: For the construction of open-topped steel box girder bridges, prefabricated concrete slab could offer several advantages over cast-in-situ deck including good quality control, fast construction, and elimination of the formwork for concrete slab casting. However, precast decks with unreinforced joints should be designed to prevent the initiation of cracking at the joints, because the performance of the joint is especially crucial for the integrity of a structural system. In this paper, experimental results on a 20m-20m continuous composite bridge model with precast decks are presented. Internal tendons and external tendons were used to prevent cracking at the joints. Judging from the inelastic behavior of the bridge model, external prestressing in negative moment regions could offer better performance in terms of cracking and flexural stiffness. Simple plastic analysis was carried out to estimate the ultimate flexural capacity of the continuous bridge, and the incremental prestress of external cables after cracking was estimated.

ASCE Subject Headings:
Box girders
Composite bridges