infraStructure Testing and Applied Research (iSTAR) Laboratory

The laboratory activities are in support of our mission and utilize the unique capabilities of iSTAR Laboratory. The focus of the activities is on improving infrastructure durability and on application innovative materials to enhance performance. 

Innovations in Bridges

Evaluation of Glass FRP Bridge Deck for Broadway Bridge Renovation

Strength and fatigue tests were conducted on fiber reinforced composite (FRP) deck panels used for the renovation of Broadway Bridge, a bascule draw bridge originally built in 1912 in downtown Portland, OR. The tests were conducted on the FRP deck panels as well as the panel to steel stringer assembly.

Vibrations Measurements on I-5 Columbia River Crossing

Traffic induced vibrations were measured at specific locations on the I-5 Interstate Bridges across the Columbia River linking Oregon and Washington State. The two bridges were equipped with new traffic cameras, which were experiencing significant movement. The vibrations were measured at the current locations and several proposed alternate locations were identified for potentially reducing the camera unintended movements.

Seismic Performance of Lifelines and Non-structural Components

Shake Table Qualification of High Voltage Insulators

Vibration and seismic simulation shake table tests were conducted on insulators supporting a high voltage switch. The vibration tests were used to identify the natural frequencies of the various components and the complete assembly. The seismic simulation tests were conducted using the 10'x10' shake table and the IEEE693 transient signal up to 120% of the signal amplitude.

Seismic Evaluation of Telecommunication Equipment

The purpose of the tests were to determine if a particular telecommunication equipment could pass a series of performance test criteria defined by the Network Equipment Building System (NEBS). These qualification tests were conducted for Underwriters Laboratories Inc.

Application of Innovative Materials and Specialty Devices

Double Action Ringfeders

A base isolator system was evaluated with static tests as well as seismic simulation using the iSTAR Laboratory shake table. The isolation system from "Design Quality Products" consisted of double acting ringfedders attached at the location of mounting bolts for large equipment.

Strength Test of Composite Panels for Rail Cars

In an effort to continue to innovate rail car design, composite panels were tested for potential use in refrigerated rail car. The purpose was to determine the structural strength of two fiberglass panels by applying incrementally increasing load. The panels consisted of glass fiber reinforced composites mounted on steel beams representative of the rail car support system.