Semi-empirical models based on in-situ geotechnical tests have become the standard of practice for predicting soil liquefaction. Since the inception of the "simplified" cyclic-stress model in 1971, variants based on various in-situ tests have been developed, including the Cone Penetration Test (CPT). More recently, prediction ...

The severity of liquefaction manifested at the ground surface is a pragmatic proxy of damage potential for various infrastructure assets, making it particularly useful for hazard mapping, land-use planning, and preliminary site-assessment. Towards this end, the recent Canterbury, New Zealand, earthquakes, in conjunction with ...

The severity of liquefaction manifested at the ground surface is a pragmatic proxy of damage potential for various infrastructure assets, making it particularly useful for hazard mapping ,land-use planning, and preliminary site-assessment. Towards this end, the recent Canterbury, New Zealand, earthquakes, inconjunction with ...

This study assesses the relative efficacy of liquefaction models based on geospatial vs. geotechnical data. In particular, state-of-practice geotechnical models based on the Cone Penetration Test (CPT) are compared to geospatial models that use readily available no-cost data. This assessment is performed using a database of ...

Deep foundations may need to resist torsional loads resulting from wind loading on traffic sign and signal pole structures, or seismic loading on curved or skewed bridges. Although methods for designing deep foundations at the ultimate limit states are readily available, and their accuracy has been quantified for selected ...

Two-lane rural highways experience a higher rate of traffic accidents than to other types of highways. One factor affecting this rate is the impact of aerodynamics on a vehicle’s stability and safety during crossing and overtaking maneuvers, especially under adverse environmental conditions such as crosswinds. This study ...

This study deals with the PacTrans theme of “Developing Data Driven Solutions and Decision-Making for Safe Transport.” Currently, all four northwestern states, including Alaska, Idaho, Oregon, and Washington, allow the use of studded tire. Studded tire can dig into asphalt pavement and pick out the small aggregate and eventually ...

Liquefaction-induced lateral spreading is a critical design consideration for many bridges in high-seismicity regions of the Pacific Northwest, with broad impacts on safety for the general public. The bridge design procedures currently used in the region tend to account for the effects of lateral spreading in a simplified ...

There is little research on the behavioral interaction between bicycle lanes and commercial vehicle loading zones in the United States. These interactions are important to understand, to preempt increasing conflicts between truckers and bicyclists. In this study, a bicycling simulator experiment examined bicycle and truck ...

Although inflation has raised the cost of paving, pavement program funding levels are about 30 percent lower than a decade ago. Resurfacing treatments typically last 10 to 20 years, but current pavement funding only allows for resurfacing every 30 years or longer. Therefore, higher user costs (mostly related to vehicle ...