Bridge Seismic Analysis and Retrofit Design Program, City of Industry, CA

RBF Consulting (RBF) was the prime consultant to the City of Industry, Department of Public Works, for this bridge seismic retrofit project, and responsible for overall project management, structural analysis and retrofit strategy development. This project involved the seismic evaluation of existing bridge structures for loads resulting from the Maximum Credible Earthquake (MCE). This retrofit project was unique in that the City desired its bridges to adhere to a higher level of seismic performance than is typically expected. Rather than the typical "no-collapse" criterion used in the vast majority of bridge retrofit programs, the City wanted the bridges to not only survive the MCE but also be fully serviceable shortly thereafter. As a result, RBF developed a one-of-a-kind seismic performance criterion against which each structure's as-built seismic performance was judged. In Phase 1 of the project, RBF evaluated each existing structure's behavior under seismic loading and identified deficiencies in the existing bridges. Retrofit strategies were developed to mitigate deficiencies and were presented to the City and County of Los Angeles. These strategies will be presented in a Strategy Meeting with the County, and upon approval of the strategy, PS&E for each bridge will be prepared. RBF was assigned eight bridges in this program: Anaheim-Puente Road Bridge over San Jose Creek, Fullerton Road Bridge over San Jose Creek; Lemon Avenue Bridge over San Jose Creek; and Stimson Avenue Bridge over San Jose Creek. RBF performed the independent check for each of the City's proposed retrofit strategies for the remaining four bridges: (Crossroads Parkway (North) Overhead over the Metrolink Rail lines, Proctor Road, Don Julian Road, and Fairway Drive Bridges over Puente Creek.