A study on the higher mode effect of rocking self-centering tall piers

被引：0
|
作者：
Zhang Y. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2018年 / 37卷 / 24期
关键词：
Higher mode effect; Mode decomposition method; Rocking self-centering tall pier;
D O I：
10.13465/j.cnki.jvs.2018.24.011
中图分类号：
学科分类号：
摘要：
In order to control the higher mode effect on rocking self-centering tall piers, the contribution of higher mode should be assessed quantitatively. Based on comparison of current research methods, a mode decomposition method was adopted to calculate the contribution of higher mode for rocking self-centering tall piers. A new index that can be used to assess the contribution of higher mode during rocking was put forward based on the analysis of current various indexes. Using seven ground motion records for three different intensities as input, the higher mode contribution of a rocking self-centering tall railway bridge pier was studied with two springs rocking model built in OpenSEES. Results show that higher mode contribution increases with the ground motion intensity. Base shear is the most sensitive structural response to higher mode effect and the contribution of the second and third mode is 97% and 27% of the first mode. The contribution of the second mode to the base moment is 34% of the first mode. Pier top displacement is not sensitive to higher mode. The contribution of the second mode to pier top displacement is only 8% of the first mode. © 2018, Editorial Office of Journal of Vibration and Shock. All right reserved.
引用
收藏
页码：66 / 71
页数：5
相关论文
共 15 条
  • [1] Macrae G.A., Kawashima K., Post-earthquake residual displacements of bilinear oscillators, Earthquake Engineering and Structural Dynamics, 26, 7, pp. 701-716, (1997)
  • [2] Ruiz-Garcia J., Miranda E., Residual displacement ratios for assessment of existing structures, Earthquake Engineering and Structural Dynamics, 35, 3, pp. 315-336, (2006)
  • [3] Erochko J., Christopoulos C., Tremblay R., Et al., Residual drift response of SMRFs and BRB frames in steel buildings designed according to ASCE 7-05, Journal of Structural Engineering, 137, 5, pp. 589-599, (2011)
  • [4] Lu L., Jiang L., Li H., Et al., Shaking table tests for aseismic performance of a controllable rocking reinforced concrete frame with column-end-hinge joints, Journal of Vibration and Shock, 35, 4, pp. 193-198, (2016)
  • [5] Lu L., Liu X., Aseismic performance of an external prestressed rocking reinforced concrete frame, Journal of Vibration and Shock, 36, 9, pp. 179-185, (2017)
  • [6] Mander J.B., Cheng C.T., Seismic resistance of bridge piers based on damage avoidance design, (1997)
  • [7] Blakeley R.W.G., Cooney R.C., Megget L.M., Seismic shear loading at flexural capacity in cantilever wall structures, Bulletin of the New Zealand Society for Earthquake Engineering, 8, 4, pp. 278-290, (1975)
  • [8] Eberhard M.O., Sozen M.A., Behavior-based method to determine design shear in earthquake-resistant walls, Journal of Structural Engineering, 119, 2, pp. 619-640, (1993)
  • [9] Panagiotou M., Restrepo J.I., Displacement-based method of analysis for regular reinforced-concrete wall buildings: application to a full-scale 7-story building slice tested at UC-San Diego, Journal of Structural Engineering, 137, 6, pp. 677-690, (2011)
  • [10] Ghorbanirenani I., Tremblay R., Leger P., Et al., Shake table testing of slender RC shear walls subjected to eastern north america seismic ground motions, Journal of Structural Engineering, 138, 12, pp. 1515-1529, (2012)
12