NEES @ UC San Diego

Current Project

Seismic Performance of Collectors in Steel Building Structures

Collectors are key structural elements in the Seismic Force-Resisting System (SFRS), delivering the inertial forces that develop in the floor system to the primary (vertical plane) lateral force-resisting elements. In contrast to the vertical-plane SFRS elements (shear walls, braced frames, moment frames, etc.), no research efforts or experimental program to date has focused specifically on collectors. Instead, design procedures for collectors have traditionally applied special seismic load combinations in ASCE-7 involving the application of the System Overstrength Factor. The rationale for this stringent prescriptive rule is an attempt to ensure that collectors and their connections remain elastic, thereby maintaining the structural integrity of the SFRS. Also, design engineers use a variety of connections for the collectors, and practically no research has been conducted to validate the adequacy of these connection details.

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Seismic Collector Project ElevationFull Size Seismic Collector Project Floor PlanFull Size


The Large High-Performance Outdoor Shake Table is supported in part by the George E. Brown, Jr. Network for Engineering Simulation (NEES) program of the National Science Foundation under Award Number CMMI-0927178.

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