ALTERNATE SUBSTRUCTURE SYSTEMS FOR STANDARD HIGHWAY BRIDGES

摘要

This paper focuses on improving bridge substructures by developing attractive and rapidly con- structued substructure systems for short- and moderate-span bridges. The importance of improved substructure design is discussed. A review of current cast-in-place and precast concrete substructure systems is presented. A specific proposal for a precast segmental substructure system is described including methods of fabrication and erection. The goal of this system is to improve aesthetics and reduce construction time for standard bridges. Reduced construction time leads to important safety and economic advantages when traffic disruption or re- Routing is necessary. Precasting would result in an increased use of high performance concrete and will bring Improved substructure durability. Reocmmendations are made for standardization of precast substructure systems.