Anaylsis and Load Testing of Two Steel through Truss Bridges in Indiana. BridgeStructure No. 58-14-3244 and Bridge Structure No. 46-11-1316. (Includes Technical Summary)

摘要

During a recent study, a representative sample of 148 highway bridges was ratedusing Bridge Analysis and Rating System (BARS), for a sample of 25 overloaded vehicles. In the sample, Steel Through Truss bridges were identified as a weak link in terms of load carrying capacity. The critical component causing these low ratings was identified as the longitudinal stringer floor members rather than the main load-carrying trusses. The main objectives of the study were to: (1) evaluate the behavior of two steel through truss bridges under controlled loading, and (2) assess the assumptions made by BARS in rating this bridge type for overload vehicles using the information obtained during the field testing.