Experimental Study of Specific Cross Beam Types Appropriate for Modular Bridges

Recently in the field of bridges that are newly built or repaired, fast construction is required more than ever. For these reasons, precast prefabricated bridge that enables rapid construction is actively discussed and studied today. In South Korea, it is called modular bridge. Cross beam is an integral component of modular bridge. It functions for load distribution, reduction of bending moment, resistance of horizontal strength on lateral upper structure. In this study, the structural characteristics of domestic and foreign cross beam types were compared. Based on this, alternative cross beam connection types suitable for modular bridge were selected. And bulb-T girder specimens were fabricated with each type of connection. The behavior of each specimen was analyzed under static loading, and cross beam connection type which is expected to be best suited to modular bridge proposed.

Authors:

• Seung-Kyung Kye
• Young-Hyo Son
• Jin-Woong Choi
• Dooyong Cho
• Sun-Kyu Park

Keywords:

• Bulb-T girder
• Cross beam
• Modular bridge.

References:

[1] Hyeong-Yeol Kim, Sang-Yoon Lee, Chang-Koo Kang, "Introduction of
PSC T-girder Bridge for Accelerated Construction", KSCE Vol.58 No.10,
2010.
[2] Dong-Min Woo, "Structural Capacity Evaluation of the Precast Cross
Beam on Prestressed Concrete Girder Bridges", Dankook University,
2010.
[3] Sang-Min Lee, "A study on rational intermediate diaphragm design of
skewed PSC girder bridge", Yonsei University, 2006.
[4] Ministry of Land, Transport and Maritime Affairs, "Bridge Design
Manual", the Republic of Korea, 2008
[5] Korean Society of Civil Engineers, "Bridge Design Specification", 2005
[6] AASHTO, "Standard Specifications for Highway Bridges", 2002.
[7] AASHTO, "LRFD Bridge Design Specifications", 4nd Edition, 2007.
[8] Expressway and Transportation Research Institute of Korea Expressway
Corporation, "Review the installation standards of 35m PSC beam
bridge", 2003
[9] Abendroth, R. E. Klaiber, F. W., and Shafer, M. W., "Diaphragm
Effectiveness in Prestressed Concrete Girder Bridges", Journal of
Structural Engineering, ASCE, 1995.
[10] Ministry of Construction and Transportation, "Concrete Structural Design
Criteria", the Republic of Korea, 2008
[11] Barr, P. J., Eberhard, M. O., and Stanton, J. F., "Live-load Distribution
Factors in Prestressed Concrete Girder Bridges", Journal of Bridge
Engineering, ASCE, 2001.
[12] Zahrai, S. M., and Bruneau, M., "Impact of Diaphragms on Seismic
Response of Straight Slab on Girder Steel Bridges", Journal of Structural
Engineering, ASCE, 1998.