Zhengyu Liu

TITLE

Research Engineer, BEC

PHONE

515-294-8103

EMAIL

zhengyu@iastate.edu

AFFILIATIONS

InTrans, BEC

About Zhengyu

Dr. Liu is a research engineer for the Bridge Engineering Center and the Timber Bridge Program. He provides analytical expertise and project oversight for BEC projects. Dr. Liu has been involved in the conduct of bridge-related research for over six years. Dr. Liu received his master’s degree in civil engineering in 2014 and doctorate in structural engineering in 2018 from Iowa State University. Following the completion of his PhD, he continued his work at the Bridge Engineering Center as a research engineer. In total, he has contributed to more than 20 bridge-related research projects for numerous federal, state, and local agencies. His current research is in the general area of bridge engineering with specific interest in accelerated bridge construction (ABC), precast bridge element design and connection detailing, time-dependent bridge superstructure behavior, structural health monitoring and load rating, and highly nonlinear bridge structure simulation, etc. He is an author/co-author of more than 20 bridge structure related research reports and peer-reviewed journal articles.

Education


  • PhD, Civil Engineering, Iowa State University, Ames, IA, 2018
  • MS, Civil Engineering, Iowa State University, Ames, IA, 2014
  • BS, Civil Engineering, Shenyang University of Technology, China, 2012

Professional Experience


  • Research Engineer, Institute for Transportation, Iowa State University, Ames, IA, 2018–present
  • Graduate Research Assistant, Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA, 2013–2018

Selected Publications


  • Freeseman, K. S., Liu, Z., Phares, B. M., and Mousavi, S. 2021. Experimental Validation of a Rapid Assessment Tool for Pile Capacity and Stability in Response to Scour Situations. Institute for Transportation, Iowa State University, Ames, IA.
  • Liu, Z., Freeseman, K. S., Dahlberg, J. M., Phares, B. M., and LaViolette, M. 2021. Lateral Slide of Multi-Span Bridges: Investigation of Connections and Other Details–Phase I. Institute for Transportation, Iowa State University, Ames, IA.
  • Freeseman, K. S., Liu, Z., and Phares, B. M. 2021. Implementation of the Negative Moment Reinforcing Detail Recommendations.” Iowa Highway Research Board, Iowa Department of Transportation, Ames, IA.
  • Freeseman, K. S., Liu, Z., and Sanderson, T. B. 2021. Exploration of Ultrasound for the Evaluation and Preservation of Structures. Iowa Highway Research Board, Iowa Department of Transportation, Ames, IA.
  • Sanderson, T. B., Liu, Z., Freeseman, K. S. 2021. Exploration of Ultrasound for the Evaluation and Preservation of Structures. Case Studies in Construction Materials, Elsevier.
  • Liu, Z., and Semendary, A. 2021. Numerical Investigation on Early Age Performance of UHPC Shear Keys between an Adjacent Prestressed Concrete Box Beams. Advances in Structural Engineering.
  • Liu, Z., and Phares, B. M. 2020. Determination of U-bolt connection load capacities in overhead sign support structures. Journal of Constructional Steel Research, Vol. 170.
  • Shi, W., Shafei, B., Liu, Z., and Phares, B. 2020. Longitudinal box-beam bridge joints under monotonic and cyclic loads. Engineering Structures, Vol. 220.
  • Liu, Z., Phares, B. M., Shafei, B., and Shi, W. 2020. Full-Scale Evaluation of the Innovative Joint Design between Adjacent Box Beams. Transportation Research Record: Journal of the Transportation Research Board.
  • Liu, Z., Freeseman, K. S., and Phares, B. M. 2020. Evaluation of the Need for Negative Moment Reinforcing in Prestressed Concrete Bridge. Engineering Structures,
  • Liu, Z., and Phares, B. M. 2020. Use of Shrinkage Compensated Concrete in the Joint between Adjacent Box Beams. Materials in Civil Engineering,
  • Liu, Z., Freeseman, K. S., Phares, B. M., and Mousavi, S. 2020. Evaluation, Laboratory Testing, Construction Documentation, and Field Testing/Monitoring of the US 52 Overflow Bridge over the Mississippi Institute for Transportation, Iowa State University, Ames, IA.
  • Phares, B. M., Liu, Z. 2019. Determination of U-Bolt Connection Load Capacities in Overhead Sign Support Structures. Iowa Highway Research Board, Iowa Department of Transportation, Ames, IA.
  • Liu, Z., and Phares, B. M. 2019. Small-Scale Investigation on Wide Longitudinal Joints Filled with Shrinkage- Compensated Concrete for Adjacent Box Beam Bridges. Journal of Bridge Engineering, Vol. 24, No. 12.
  • Shi, W., Liu, Z., Shafei, B., and Phares, B. M. 2019. Early-age performance of longitudinal bridge joints made with shrinkage-compensating cement concrete. Engineering Structures, Vol. 197.
  • Phares, B. M., Greimann, L. F., Liu, Z., and Freeseman, K. 2017. Context Sensitive Design: Testing of Multi-Performance Level Box Beam Standards. Iowa Highway Research Board, Iowa Department of Transportation, Ames, IA.
  • Liu, Z., Phares, B. M., and Greimann, L. F. 2016. Use of Longitudinal Expansion Joints in Wide-Bridge Applications to Reduce Deck Cracking. Journal of Bridge Engineering, Vol. 21, No. 10.
  • Phares, B. M., Greimann, L. F., and Liu, Z. 2015. Evaluation of the Need for Longitudinal Median Joints in Bridge Decks on Dual Structures. Iowa Highway Research Board, Iowa Department of Transportation, Ames, IA.

Research Interests


  • Accelerated Bridge Construction (ABC)
  • Precast bridge element design and connection detailing
  • Connection detailing for steel structure
  • Time-dependent bridge superstructure behavior
  • Structural health monitoring and load rating
  • Highly non-linear bridge structure simulation
  • Timber bridge structure
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