Experimental and numerical investigations of seismic performance of precast bridge columns with novel lap splice connections by UHPC

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@Article{Gao:2025:engstruct,

• author = "Jianfeng Gao and Biao Ma and Pan Liu and Jianzhong Li and Zehua Bao",
• title = "Experimental and numerical investigations of seismic performance of precast bridge columns with novel lap splice connections by {UHPC}",
• journal = "Engineering Structures",
• year = "2025",
• volume = "322",
• pages = "119165",
• keywords = "genetic algorithms, genetic programming, Genetic programming-orthogonal least square, Lap splice connection, Shake table test, Ultrahigh-performance concrete, Bond-slip effect",
• ISSN = "0141-0296",
• URL = "https://www.sciencedirect.com/science/article/pii/S0141029624017279",
• DOI = "doi:10.1016/j.engstruct.2024.119165",
• abstract = "In this study, the genetic programming-orthogonal least squares (GP-OLS) tool was used to find the optimum equation that fit a database of pullout tests to estimate the bond strength between UHPC and rebar. Then, a procedure based on the equation for bond strength was proposed to guide the design of a novel lap splice connection by UHPC used to connect bridge columns to footings. A 1/3.5 geometrically scaled bridge model was designed and tested on shake tables to investigate seismic performance of precast bridge columns with the novel connection type. Tests results show that plastic deformation and consequent damage is mainly concentrated above the lower column-footing connection segment for a precast column, while the connection segment remains minimally damaged. Furthermore, a calibrated finite-element model was developed to account for the bond-slip effect in a precast column with the novel connection type. Numerical results show good agreement with experimental counterparts when the bond-slip effect is appropriately considered",

}

Genetic Programming entries for Jianfeng Gao Biao Ma Pan Liu Jianzhong Li Zehua Bao

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