Abstract：Although current seismic design codes in different countries give priority to obey the philosophy of capacity design for piles, limited structural yielding of piles may not be always detrimental. In this regard, the ductile behavior of 2×3 Elevated Pile-cap Foundations (EPFs) is investigated using Pushover analysis to explore their potentials for seismic ductility design. The numerical model is calibrated by a quasi-static test. Parametric studies are performed considering the structural and soil properties, including pile diameter, longitudinal reinforcing ratio, transverse reinforcing ratio, initial axial compressive ratio, superstructure inertia induced bending moment, aboveground height and soil relative density. Ductility indices called Reparable Displacement Ductility Factor (RDDF) and Ultimate Displacement Ductility Factor (UDDF) are proposed and the effects of different variables on the ductile properties of EPFs are revealed. Median values for the RDDF and UDDF (2.66 and 3.82, respectively) are derived and the quantitative relationships between the RDDF, UDDF and curvature ductility factor are established.
王晓伟 Guillermo Blanco 叶爱君 赫中营. 砂土中桥梁高桩承台基础的抗震延性能力参数分析[J]. 土木工程学报, 2018, 51(5): 112-121.
Wang Xiaowei Guillermo Blanco Ye Aijun He Zhongying . Parametric study on seismic ductility capacity of bridge elevated pile-cap foundation in sand. 土木工程学报, 2018, 51(5): 112-121.
