Faculty Directory

Zhang, Yunfeng

Zhang, Yunfeng

Professor
Civil and Environmental Engineering
1178 Glenn. L. Martin Hall

Education

  • Ph.D. in Applied Mechanics, California Institute of Technology, 2001

  • M.S. in Civil Engineering (Structures), Tsinghua University (Beijing, China), 1996

  • B.S. in Civil Engineering (Structures), Tongji University (Shanghai, China), 1993

Honors and Awards

  • Graduate Research Board Award, University of Maryland, 2008

  • Best Paper Award, ASCE Journal of Computing in Civil Engineering, 2006

  • NSF CAREER Award, 2006

 

  • Machine learning modeling of geotechnical data
  • 3D geological model with AI-predicted point cloud data
  • Portable self-centering modular panels for rapid structural strengthening
  • Mass timber structures
  • Stainless steel bridge bearings
  • Self-centering wood structures
  • Train-induced ground vibration and impact on buildings
  • Drone based bridge compoment inspections

Research facility:

Structures Lab has equipments to conduct large scale structures testing such as fatigue testing of bridge structures and mass timber structures, low cycle fatigue behavior test of stainless steel structures components, self-centering modular panels and self-centering steel eccentrically braced frames. The mission of the Structural Lab is to fulfill the emerging need in the development and validation of resilient modular structures and sensor/structural health monitoring technology for civil infrastructures.

Structures Lab testing facility includes large-scale structure testing systems including a 1000 sq. ft. strong floor, 3-DOF servo-hydraulic controlled test system and 400-kips SATEC universal testing machine. There are also loading frames for large scale structural testing. The large scale structural testing facility has a 3-DOF servo-hydraulic controlled test system including three MTS servo-controlled actuators (two 55 kips load capacity, one 110 kips load capacity), a 60-GPM hydraulic power supply, a 4-channel servo-control system with FlexTest GT test software from MTS, three 50-GPM service manifolds. A 108-channel data acquisition system from Pacific Instruments (model 6005, shown in Figure 1-(b)) is available for instrumentation data collection (32 strain gage channels, 44 thermocouple channels, 16 accelerometer channels, and 16 LVDT channels) in lab and field test. Available transducers in the lab include load cells, LVDT, ultrasonic displacement transducer, tilt sensor, strain gages, thermocouples and accelerometers. Reaction frames are set up for different load configuration (e.g., load frame in Figure 1-(a) is set up for applying vertical load on test specimen such as concrete beam). This facility has been used in the past two years for fatigue test of steel structures, prestressed concrete beams, and seismic performance characterization test of steel braces and dampers. An overhead crane with 5-tonf lift capacity is used to move test specimens around the lab. A SATEC servo-hydraulic universal testing machine is available for applying both tension and compression load to specimens (e.g., concrete cylinders) up to 400 kips.


Dr. Zhang research program has received external funding support totaling $6.8 million from diverse sources including the National Science Foundation (11 competitively awarded NSF grants in total), U.S. Department of Transportation and Federal Highway Administration, MD State Highway Adminstration and other sponsoring agencies. 

Most recent grants are: 

1. "Proof Load Testing of Sign Clips and Railing", PI, This funded research project aims to perform experimentally evaluate aluminum extruded panels and their support systems against the updated AASHTO wind load and impact criteria. The research outcomes will enable the following: (i) Ensure structural compliance and safety of overhead sign structures under updated load conditions. (ii) Provide evidence-based recommendations for material and design upgrades or confirm adequacy of existing specifications. (iii) Update state DOTs' structural standards, specifications, and training programs to align with national standards and contemporary environmental challenges. The findings from this research will be pivotal in guiding DOTs' revisions of structural manuals, procurement processes, and project review standards. Additionally, clear guidelines for contractors and suppliers will facilitate a smooth transition to improved practices, ensuring widespread adoption of safer and more durable overhead sign systems.  

2. "Proof load testing of HPC modular construction,” PI, The overall purpose of this experimental research project is to establish a comprehensive and reliable structural performance and property database for the high-performance concrete (HPC) modular assembly structural system, while simultaneously identifying strategies to improve its structural behavior based on rigorous experimental and numerical study findings. Unlike conventional single-wythe CMU (concrete masonry unit) construction, which typically relies on discrete grouted cells and intermittent reinforcement, the proposed HPC modular assembly system functions as a continuous structural system, where vertical reinforcement elements extend from the foundation to the roof.  (Applications are welcome from prospective graduate students and postdoctoral researchers with experimental testing experience for Spring 2027 admission to join this project.)

3. "Use of Stainless-Steel Bridge Bearings with Steel Girder Bridges",  PI, addressing the question on whether it is viable option to replace the standard metal bearings with stainless steel and eliminate any possibility of rusting. The outcomes of this project include research survey results and literature search findings and the future adoption of stainless steel bearings or replacing conventional steel plates (masonry and sole plates, anchor rods and washers) in elastomeric bridge bearings has a strong potential of resulting in the elimination of maintenance efforts resulting from bearing replacements, which might substantially reduce the life-cycle cost of bridge bearings. This study also compared the life cycle cost of a stainless steel bridge bearing (maintenance free) and that of elastomeric bridge bearing with maintenance over its life span.

  • ENCE353 Introduction to Structural Analysis
  • ENCE444 Experimental Methods in Geotechnical and Structural Engineering
  • ENCE613 Structural Dynamics
  • ENCE688A Sensing and Systems Control
  • ENCE688W (ENCE489W) Design of Masss Timber Structures
  • ENCE710 Steel Structures Design
  • ENCE715 Earthquake Engineering

Selected recent publications (see my google scholar page for more publications): 

  • Zhang, Y., Darilmaz A. (2026) “Physics-Constrained Machine Learning Modeling for Geotechnical Data Prediction: Case study on Site Soil Type and Bedrock Depth Datasets,” Geotechnics, 6(1), 20: https://doi.org/10.3390/geotechnics6010020    

  • Xu, J., Zhang, Y. (2025) “AI-powered digital twin technology for highway system slope stability risk monitoring,” Geotechnics, 5(1), 19: https://doi.org/10.3390/geotechnics5010019.

  • Rezvan, P, Zhang, Y. 2024). Near-fault ground motion effect on self-centering modular bracing panels considering soil-structure interaction,” Advances in Structural Engineering. Volume 27, Issue 3, https://doi.org/10.1177/136943322312220.

  • Rezvan, P, Zhang, Y. (2023). Digital Twin Model for Regional-Scale Seismic Resilience Assessment of School Buildings with Modular Retrofit Panel System. Journal of Tongji University, 51(12), 1879- 1899.   

  • Rezvan, P., Zhang, Y. (2023). Seismic design and performance study of self-centering moment resisting frames with sliding rocking beams and preloaded disc springs. Earthquake Engineering and Structural Dynamics.  10.1002/eqe.3859

  • Rezvan, P. and Zhang, Y. (2022). “Nonlinear seismic performance study of D-type self-centering eccentric braced frames with sliding rocking link beams,” Earthquake Engineering and Structural Dynamics, 51(4): 875 - 895.

  • Chu, G., Wang, W. and Zhang, Y. (2022). “Experimental and Numerical Study of Near-Fault Seismic Performance of 2-Story Steel Framed Building with Self-Centering Modular Panels,” ASCE J. Structural Engrg., 148(6).

  • Liu, H. and Zhang, Y. (2020). "Deep Learning based Crack Damage Detection Technique for Thin Plate Structures using Guided Lamb Wave Signals," Smart Materials and Structures, 29(1): 015032. (Top Cited Paper Award - North American, by IOP Publishing 2023)

  • Liu, H. and Zhang, Y. (2020). "Bridge Condition Rating Data Modeling using Deep Learning Algorithm," Structure and Infrastructure Engineering, 16(10): 1447-1460, https://doi.org/10.1080/15732479.2020.1712610

  • Liu, H. and Zhang, Y. (2019). "Deep learning-based brace damage detection for concentrically braced frame structures under seismic loadings.” Advances in Structural Engineering, https://doi.org/10.1177/1369433219859389.
  • Keivan, A. and Zhang, Y. (2019). “Seismic performance evaluation of self-centering K-type and D-type steel eccentrically braced frame systems,” Engineering Structures, 184: 301-317. 
  • Liu, H. and Zhang, Y. (2019). “Image-driven structural steel damage condition assessment method using deep learning algorithm.” Measurement,133: 168-181.
  • Keivan, A. and Zhang, Y. (2019). “Nonlinear seismic performance of Y-type self-centering steel eccentrically braced frame buildings,” Engineering Structures, 179(15): 448-459. 
  • Tong, L, Zhang, Y, Zhou X, Keivan A, Li R. (2019). “Experimental and analytical investigation of D-type self-centering steel eccentrically braced frames with replaceable hysteretic damper,” ASCE J Structural Engrg, 145(1): 04018229.
  • Zhang, Y. and Liu, H. (2019). “Experimental study of vibration mitigation of mast arm signal structures with particle-thrust damping based tuned mass damper.” Earthquake Engineering and Engineering Vibration, 18(1): 219-231.
  • Zhang, Y., Ayyub, B., & Huang, H. (2018). "Enhancing Civil Infrastructure Resilience with Structural Health Monitoring." Ch.1 in Resilience Engineering for Urban Tunnels, ASCE. 
  • Tong, L., Zhang, Y., Zhang, L., Liu, H., Zhang, Z., and Li, R. (2018). “Ductility and energy dissipation behavior of G20Mn5QT cast steel shear link beams under cyclic loading.” Journal of Constructional Steel Research, 149, 64-77.
  • Wang, Z., Zhang, Y., Wang, Y., Du, X. and Yuan, H. (2018). “Numerical study on fatigue behavior of tubular joints for signal support structures,” J. Constructional Steel Research, 143: 1-10.
  • Wang, W., Kong J., Zhang, Y., Chu G. and Chen, Y. (2017). “Seismic behavior of self-centering modular panel with slit steel plate shear walls: experimental testing,” ASCE J. Structural Engrg., 144(1).
  • Wang, W., Du, X., Zhang, Y. and Chen, Y. (2017). “Experimental Investigation of beam-through steel frames with self-centering modular panels,” ASCE J. Structural Engrg., 143(5).
  • Xu, X., Zhang, Y. and Luo, Y. (2016). “Self-centering eccentrically braced frames using shape memory alloy bolts and post-tensioned tendons,” J. Constructional Steel Research, 125: 190–204.
  • Xu, X., Zhang, Y. and Luo, Y. (2016). “Self-centering modularized link beams with post-tensioned shape memory alloy rods,” Engineering Structures, 112: 47–59.
  • Zhang, Y. and Bai, L. (2015). “Rapid structural condition assessment using radio frequency identification (RFID) based wireless strain sensor,” Automation in Construction, 54: 1-11.
  • Zhang, Y., Shi, F., Song, J., Zhang, X., Yu, S. (2015). “Hearing characteristics of Cephalopods: modeling and environmental impact study,” Integrative Zoology, 10: 141-151.
  • Li, R., Zhang, Y. and Tong, L.W. (2014). “Numerical study of the cyclic load behavior of AISI 316l stainless steel shear links for seismic fuse device,” Frontiers of Structural and Civil Engineering, 8(4): 414-426.
  • Li, Z. and Zhang, Y. (2014). “Fatigue life prognosis study of welded tubular joints in signal support structures,” International Journal of Steel Structures, 14(2): 281-292.
  •  Zhou, C. and Zhang, Y. (2014). “Acoustic emission source localization using coupled piezoelectric film strain sensors” J. of Intelligent Material System and Structures, 25(16): 2082-2092.
  • Zhou, C. and Zhang, Y. (2014). “Near-field acoustic emission sensing performance of piezoelectric film strain sensor,” Research in Nondestructive Evaluation, 25(1): 1-19. (DOI:10.1080/09349847.2013.810318)
  •  Li, Z. and Zhang, Y. (2014). “Extreme value theory based structural health prognosis method using reduced sensor data,” Structures and Infrastructure Engineering, 10(8): 988-997. DOI: 10.1080/15732479.2013.774427.
  • Hu, X., and Zhang, Y. (2013). “Ductility demand of partially self-centering structures under seismic loading: SDOF systems,” Journal of Earthquake and Structures, 4(4), 365-381.
  • Moghaddasi B, N.S. and Zhang, Y. (2013). “Seismic analysis of diagrid structural frames with shear-link fuse devices,” Earthquake Engineering and Engineering Vibration, 12(3), 463-472.
  • Bai, L. and Zhang, Y. (2013). “Nonlinear dynamic behavior of steel framed roof structure with self-centering members under transient wind loading,” Engineering Structures, 49(4): 819–830.
  • Hu, X., Zhang, Y. and Moghaddasi, N. (2012). “Seismic performance of reinforced concrete frames retrofitted with self-centering hybrid wall,” Advances in Structural Engineering, 15(12): 2139-2151.
  • Bai, L. and Zhang, Y. (2012). “Collapse fragility assessment of steel roof framings with force limiting devices under transient wind loading,” Frontiers of Structural and Civil Engineering, 6(3): 199-209. DOI: 10.1007/s11709-012-0168-4.
  • Moghaddasi B, N.S., Zhang, Y. and Hu, X. (2012). “Seismic retrofitting of reinforced concrete frame structures using GFRP-tube-confined-concrete composite braces,” Earthquake Engineering and Engineering Vibration, 11(1): 91-105.
  • Mercado, M. and Zhang, Y. (2012). “A hybrid simulation testbed for realistic evaluation and characterization of NDE and sensor technology,” Journal of Bridge Engineering, 17(6): 907-920.
  • Zhou, C. and Zhang, Y. (2012). “Particle filter based noise removal method for acoustic emission signals,” Mechanical Systems and Signal Processing, 28(1-2): 63–77.
  • Zhang, Y. and Hu, X. (2010). “Self-centering seismic retrofit scheme for reinforced concrete frame structures: SDOF system study,” Earthquake Engineering and Engineering Vibration, 9(2): 271-283.   DOI 10.1007/s11803-010-0012-6.
  • Zhang, Y., Hu, X. and Zhu, S. (2009). “Seismic performance of benchmark base isolated bridges with superelastic Cu-Al-Be wire damper,” Structural Control and Health Monitoring, 16: 668-685.  

 

Names in bold font indicate the correspondence author of the paper.

 

 

Affordable Bridge Inspection With AI

Drones can feed imagery to AI algorithms, enabling rigorous inspections at a fraction of the cost.

Research on Debris Clearance Presented at TRB

Associate Professor Xianfeng Yang and his team previously won recognition from AASHTO.

Attoh-Okine Named UMD CEE Chair

University of Delaware Professor, ASCE Fellow to lead department.

Five Clark School Students Awarded Summer Research Fellowships

Research fellowships provide support to UMD doctoral students at mid-career (i.e., in the period approximately before, during, or after achievement of candidacy).

A Picture of Structural Health

CEE uses deep learning to rank the health of a building's earthquake mitigation component from a single photo.

Safer Travels: How Civil Engineers are Working to Improve U.S. Bridges, Roadways

Researchers from the Dept. of Civil & Environmental Engineering’s BEST Center and NTC@Maryland are working to improve traveler safety.

CEE Launches Infrastructure Engineering Laboratories Renovation Initiative

CEE to redesign virtual and physical infrastructure engineering laboratories.

UMD Clark School Highlights Disaster Resilience at Mpact Week

Five-day event focused on role of engineers in disaster prevention, mitigation, and response.

Clark School Faculty Promotions Announced

Faculty promoted to full professor, associate professor with tenure.

Drs. Chung Fu and Yunfeng Zhang Awarded $2.67 Million Research Project by RITA

Drs. Zhang and Fu have led a team of researchers from UMD, North Carolina State University and URS Corporation that was awarded a $2.67 million research projects by RITA.  

CEE’s Dr. Yunfeng Zhang Awarded National Science Foundation Grant

Dr. Yunfeng Zhang’s project receives NSF approval.