About the Authors

Wan Yang

Affiliation Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia, United States of America

Linsey C. Marr

lmarr@vt.edu

Affiliation Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WY LCM. Performed the experiments: WY. Analyzed the data: WY LCM. Wrote the paper: WY LCM.