Lateral cyclic response sensitivity of rectangular bridge piers confined with UHPFRC tube using fractional factorial design
Lateral cyclic response sensitivity of rectangular bridge piers confined with UHPFRC tube using fractional factorial design
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采用分数阶乘设计的 UHPFRC 管约束矩形桥墩的横向循环响应灵敏度
DOI：
10.1016/j.engstruct.2021.111883
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发表时间：
2021-05
影响因子：
5.5
通讯作者：
Tong Teng
中科院分区：
文献类型：
--
作者：
Li Shuai;Zhao Taiyi;Chu Changqing;Wang Jingquan;M. Shahria Alam;Tong Teng
通过在RC桥墩中使用超高性能纤维混凝土（UHPFRC）管，与传统的RC桥墩相比，该桥墩在地震中可以大大减少地震破坏。这种新型桥墩的抗震性能受到多种设计因素的影响。本研究旨在确定影响UHPFRC管限墩循环响应的各主要因素及其相互作用的显著水平。分数因子设计方法用于统计估计不同主要因素及其相互作用的影响。首先建立了UHPFRC管约束柱的三维有限元模型，并用实验结果进行了验证。然后，考虑了十个潜在的材料和几何相关因素，进行了灵敏度研究。对UHPFRC管约束柱的初始刚度、承载能力、残余漂移、滞回耗能和等效粘性阻尼五个响应变量进行了研究。通过参数化研究，确定各响应变量的显著性因素，包括主要因素及其相互作用。根据敏感性分析结果，提出了预测方程，通过回归分析预测其他具有相同柱截面的UHPFRC管约束柱的响应量。结果表明，纵筋配筋率、轴向荷载比和纵横比对各响应变量的影响较大（总贡献率大于40%）。
Through the use of ultra-high performance fiber reinforced concrete (UHPFRC) tubes in an RC bridge pier, the pier can substantially reduce seismic damages during earthquakes compared to the conventional RC piers. The seismic behavior of such a novel bridge pier is affected by various design factors. This study aims at identifying the significant levels of each main factor and their interactions which affect the cyclic response of UHPFRC tube-confined pier. A fractional factorial design methodology is used to statistically estimate the effects of different main factors and their interactions. 3D finite element models of the UHPFRC tube-confined columns are first generated and validated by using experimental results. Then, a sensitivity study is conducted considering ten potential material and geometry-related factors. Five response variables, i.e. the initial stiffness, load-carrying capacity, residual drift, hysteretic energy dissipation, and equivalent viscous damping, for the UHPFRC tube-confined column are examined. From the parametric study, the significant factors including the main factors and their interactions are determined for each response variable. According to the sensitivity analysis results, predictive equations are proposed to predict the response quantities for other UHPFRC tube-confined columns with the same column cross-section through regression analysis. Results demonstrate that the longitudinal steel reinforcement ratio, axial load ratio, and aspect ratio have large effects (with total contributions greater than 40%) on all the response variables.
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影响因子：
2.6
作者：
P. Zohrevand;A. Mirmiran
通讯作者：
P. Zohrevand;A. Mirmiran
低抗弯配筋率钢筋混凝土桥墩的UHPC导管架改造：实验研究和三维有限元建模
影响因子：
3.7
作者：
Teng Tong;Jingquan Wang;Zhao Liu;Haipeng Lei
通讯作者：
Haipeng Lei
影响因子：
3.6
作者：
Kwan, Wing-Pin;Billington, Sarah L.
通讯作者：
Billington, Sarah L.
影响因子：
1.7
作者：
K. Wille;A. Naaman;G. Parra-Montesinos
通讯作者：
K. Wille;A. Naaman;G. Parra-Montesinos
DOI：
--
发表时间：
1972-07
期刊：
Journal of the Structural Division
影响因子：
--
作者：
R. Park;D. Kent;R. Sampson
通讯作者：
R. Park;D. Kent;R. Sampson