Critical angle of earthquake input for self-centering bridge piers of railways
To investigate the influence of ground motion input angles on the seismic response of railway self-centering piers,a seismic response analysis model for spatial self-centering bridge piers was established and validated using a simply supported beam bridge as the case study.A to-tal of 22 sets of strong motion records were selected as seismic inputs.The yield surface functionΨ was used to determine the critical input angle.Starting from an initial angle of 0°,the seismic response of the railway self-resetting pier was examined by rotating clockwise,increasing the an-gle by 5° increments each time.The results show that the value of Ψ was maximized at an input angle of 145°,designating this as the critical input angle for the pier.The seismic response in this critical direction surpassed those observed in the longitudinal and transverse directions.Designs that ignore the critical angle of ground motion in the design of self-centering bridge piers may be unsafe.
self-centering pierthree-dimensional ground motioncritical angleyield surface function
万方数据
维普
