The overall scope of this project is to enhance the ability to build quality bridges at an accelerated and efficient pace in seismic regions. Such improvements are realized by using precast components in conjunction with the capacity design method.


Integral column and cap beam systems for bridges using precast concrete girders have several advantages over integral and non-integral structures consisting of steel girders or cast-in-place concrete. However, the use of pre- cast concrete girders for the design of earthquake-resistant bridges in the US is limited due to the lack of research and design information regarding the cap beam connection to the girders. The research detailed here investigated the seismic design of a bridge system utilizing a reinforced concrete column integrally connected to concrete cap beams and precast concrete girders. The investigation included finite element and grillage analyses and experimental testing of several large-scale units, including a system unit test.

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