This paper reports the findings of research examining the blast resistance of bridge piers that are designed in accordance with current knowledge and specifications to ensure ductile seismic performance. Blast testing was conducted on 1/4 scale ductile RC columns, and nonductile RC columns retrofitted with steel jacketing. The seismically designed RC and steel jacketed RC columns did not exhibi...

This study investigates the scaling of photobioreactor productivity based on the growth of Nannochloropsis salina incorporating the effects of direct and diffuse light. The scaling and optimization of photobioreactor geometry was analyzed by determining the growth response of a small-scale system designed to represent a core sample of a large-scale photobioreactor. The small-scale test apparatu...

The direct shear test is a widely used method of determining peak and critical state strength parameters for soil and for soil-manufactured material interfaces. However, stress conditions inside the box during shear are not well known. This paper presents a new micromechanics-based approach that modifies existing relationships between plane strain and direct shear friction angles taking into ac...