Full-scale testing and nonlinear finite element analysis of a pioneering fully prefabricated noise barrier wall system

• Published in: Engineering structures 2023-10, Vol.293, p.116633, Article 116633
• Main Authors: Elrefae, Ahmad G., Issa, Mohsen A.
• Format: Article
• Language: English
• Subjects: Full-scale Testing; NLFEA; Noise Barrier Wall; Precast; Prefabricated
• ISSN: 0141-0296; 1873-7323
• DOI: 10.1016/j.engstruct.2023.116633

•Full-scale structural testing of a pioneering noise barrier wall system.•Non-linear finite element analysis of a full-scale noise barrier wall system.•Proper calibration and validation of NLFEA with gap and sliding. The structural behavior of a novel fully prefabricated noise barrier wall system was examined experimentally and analytically using nonlinear finite element analysis. The wall components and connectivity details were developed to be a totally precast system for fast-track construction. Two full-scale prototypes were designed, fabricated, assembled, and prepared for full-scale testing at the High-Bay Structural Laboratory at the University of Illinois at Chicago. Each prototype was instrumented with about 40 sensors including strain gauges, linear variable differential transducers, and crack meters at pre-identified critical locations essential for understanding its structural behavior. In addition, a nonlinear finite element analysis model of the wall system prototype was required for future refinement and adjustment of the noise barrier wall system components. With proper calibration based on the experimental results, the nonlinear finite element analysis model will allow for conducting parametric studies on key factors relevant to the wall behavior without the need for costly and time-consuming full-scale testing. The structural behavior of the wall system was analyzed in terms of the load–deflection curves, load–strain curves, cracking, uplift, and failure mode. The experimental results revealed that the wall system was structurally stable up to a high loading level and met the intended serviceability and strength requirements.