Home > Published Issues > 2015 > Volume 4, No. 1, February, 2015 >

Secondary Effects in Precast Pre-Stressed W-Girder Integral and Continuous Bridges

Navin Kumar Chaudhary 1 and S. K. Duggal 1
1. Transport Business Group, Ch2mHill, UAE.
2. Department of Civil Engineering, MNNIT Allahabad, New Delhi.

Abstract—Movement joints and bearings in concrete bridges can cause severe maintenance issues during the service life of a structure. A recent trend in bridge design has been towards integral type structures. Durability of such bridges is greatly improved by removing or minimizing the movement joints and bearings. Further, these structures offer better riding quality and a better distribution of horizontal loads. A simply supported pre-stressed girder deforms due to primary loads. However, secondary effects further affect the geometry, when these girders are made continuous over the supports or made integral with the supports. It is found that the secondary forces are important and must be considered in the design. This paper presents a comparison of primary, secondary and design forces in Integral and continuous bridges with open foundation, constructed using W- type precast pre-stressed girders.

Index Terms—Primary, Secondary, Design, Earth pressure, Creep, Shrinkage, Temperature

Cite: Navin Kumar Chaudhary and S. K. Duggal, "Secondary Effects in Precast Pre-Stressed W-Girder Integral and Continuous Bridges," International Journal of Structural and Civil Engineering Research, Vol. 4, No. 1, pp.100-108, February 2015.