Investigation on Seismic Performance and Retrofit of Reinforced Concrete C-bent Columns

钢筋混凝土C型弯柱抗震性能研究及改造

• 批准号: 16360224
• 负责人: KAWASHIMA Kazuhiko
• 金额: $ 9.22万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360224/
• 关键词: Disaster prevention; Seismic Design; Seismic retrofit; C bent columns; Seismic Strengthening; Reinforced concrete structures; Seismic response analysis; 1995 Kobe, Japan earthquake

C-bent columns are vulnerable under extreme ground motions due to eccentric axial force and bending moment. Once ground excitation becomes extensive, compression failure of column at the plastic hinge is initiated at the compression side resulting in a significant residual drift in this direction. In this study, peculiar seismic response of C-bent columns was clarified based on hybrid loading tests and analysis on reinforced concrete columns. Based on results of loading experiment, a nonlinear hysteretic model was developed to take account of combined bending and torsion under a constant axial force. Two seismic retrofit measures were proposed and developed. Through loading xperiment, effectiveness of those methods for mitigating residual drift in the compression side was verified. Application of finite element method to C-bent columns showed that finite element method predicts peculiar nonlinear hysteretic behavior of C-bent columns with reasonable accuracy. Strong nonlinear seismic response of bridges supported by C-bent columns was analyzed using a nonlinear hysteretic model for combined torsion and flexure which was developed in this study.

由于偏心轴力和弯矩，C 形弯曲柱在极端地面运动下很容易损坏。一旦地面激励变得广泛，塑料铰链处的柱的压缩失效就会在压缩侧开始，导致沿该方向产生显着的残余漂移。本研究通过对钢筋混凝土柱的混合加载试验和分析，阐明了 C 型弯柱的特殊地震响应。基于加载实验的结果，建立了非线性迟滞模型来考虑恒定轴向力下的弯曲和扭转组合。提出并制定了两项抗震改造措施。通过加载实验，验证了这些方法减轻压缩侧残余漂移的有效性。有限元方法在 C 形弯柱上的应用表明，有限元方法能够以合理的精度预测 C 形弯柱特有的非线性滞回行为。使用本研究中开发的扭转和弯曲组合的非线性滞回模型分析了 C 型弯柱支撑的桥梁的强非线性地震响应。

项目成果

Analytical Study on the Parameters Affecting Seismic Torsion in Skewed Bridge Piers

斜交桥墩地震扭转影响参数分析研究

• 发表时间: 2006
• 期刊: Proc. 8th U.S. National Conference on Earthquake Engineering 1-10(CD-ROM)
• 作者: Tirasit;P.;Kawashima;K.
• 通讯作者: K.

RC逆L字型橋脚の耐震性及び鋼板巻立工法の適用性に関する検討

RC倒L形桥墩抗震及钢板缠绕法适用性研究

• 发表时间: 2005
• 期刊: 地震時保有耐力法に基づく橋梁等構造の耐震設計法に関するシンポジウム(土木学会) 8
• 作者: 福田智之;川島一彦;渡邊学歩;永田聖二
• 通讯作者: 永田聖二

Effect of Bilateral Excitation on the Seismic Performance of Reinforced Concrete Bridge Columns based on Hybrid Loading Test

基于混合加载试验的双边激励对钢筋混凝土桥柱抗震性能的影响

• 发表时间: 2005
• 期刊: Structural Engineering and Earthquake Engineering Vol.801/I-73
• 作者: Ogimoto;H.;Kawashima;K.;G;Watanabe.;S;Nagata
• 通讯作者: Nagata

Flexural Strength and Ductility of RC Bridge Columns under Bilateral Excitation

双边激励下RC桥柱的抗弯强度和延性

• 发表时间: 2005
• 期刊: Proc. 20th US-Japan Bridge Workshop on Design Modeling Experimentation and Performance (US-Japan Panel on Wind and Seismic Effects) (UJNR) Vol.20
• 作者: Kawashima;K.;Watanabe;G.;Ogimoto;H.;Hayakawa;R.
• 通讯作者: R.

The Effect of Bilateral Excitation on Seismic Performance of RC C-Bent Column

双边激励对钢筋混凝土C型弯柱抗震性能的影响

• 发表时间: 2005
• 期刊: Proc. Annual Meeting of Japan Society of Civil Engineering Vol.3
• 作者: Ogimoto;H.;Kawashima;K.;Watanabe;G.
• 通讯作者: G.