Development of Damage-Free columns with using Plastic-Deformable Materials in the Plastic-Hine Region

在塑性区域使用塑性变形材料开发无损伤柱

• 批准号: 13450184
• 负责人: KAWASHIMA Kazuhiko
• 金额: $ 8.7万
• 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: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450184/
• 关键词: Earthquake Engineering; Seismic Design; Fault Displacement; Fault Model; Near-Field Ground Motions; Fault Dislocation; Bridge; Foundations; 橋梁; 地震対策; 鉄筋コンクリート; 免震設計; 新技術

In an earthquake, a standard reinforced concrete column develops plastic deformation in the plastic hinge region under a strong near-field ground motion. Although the lateral confinement is effective to enhance the plastic deformation capacity, it is likely that the damage has to be repaired after an earthquake. This study aims at developing a column in Which a rubber layer is built-in at the plastic hinge so that the column has a 4% drift deformation capacity without damage in the concrete. Prestressing tendons are installed in the column in order to resist tension force in addition to reinforcing bars. A cyclic loading test is conducted for eleven reinforced concrete columns. Fiber element analysis was conducted to interpret the test results. It is found from the test and analysis that damage of concrete in the plastic hinge region is extremely limited in the rubber layer built-in columns. Thus, it was concluded that the development 'of damage-free column which enables to deform up to 4% drift without having significant damage Was completed although there are many problems which remain to be solved to realize the implementation.

在地震中，一个标准的钢筋混凝土柱在塑性铰区发生塑性变形，在强近场地震动作用下。虽然侧向约束能有效地提高结构的塑性变形能力，但地震后的损伤很可能需要修复。本研究旨在发展一种在塑性铰处设置橡胶层的柱，使柱具有4%的位移变形能力，而不破坏混凝土。预应力筋安装在柱中，以抵抗除钢筋外的拉力。对11根钢筋混凝土柱进行了低周反复荷载试验。进行纤维元素分析以解释测试结果。试验分析表明，橡胶层嵌固柱塑性铰区混凝土的破坏极为有限。因此，得出的结论是，虽然有许多问题有待解决，以实现实施的无损伤柱的发展，它能够变形高达4%的漂移，而没有显着的损害已经完成。

项目成果

松川亮平, 川島一彦, 堺淳一, 庄司学: "円形断面RC橋脚に対するスパイラル筋の横拘束効果"構造工学論文集. 48A. 715-724 (2002)

Ryohei Matsukawa、Kazuhiko Kawashima、Junichi Sakai、Manabu Shoji：“螺旋钢筋对圆形截面 RC 桥墩的横向约束效果”《结构工程杂志》48A (2002)。

Kawashima, K., Nagai, M.: "Development of a Reinforced Concrete Pier with a Rubber Layer in the Plastic Hinge Region"Journal of Structure Mechanics and Earthquake Engineering. [703/I-59]. 113-128 (2002)

Kawashima, K., Nagai, M.：“塑料铰链区域带有橡胶层的钢筋混凝土桥墩的开发”结构力学与地震工程杂志。

Nagai, M., Kawashima, K.: "Development of Damage-Free Bridge Columns"First Symposium of Japan Association for Earthquake Engineering. [1]. 299 (2001)

Nagai, M., Kawashima, K.：“无损桥梁柱的发展”日本地震工程学会第一届研讨会。

Kawashima, K.: "Seismic Performance of RC Bridge Columns subjected to Bilateral Excitation"Proc.Symposium on Environmental Issues related to Infrastructure Development. 339-348 (2003)

Kawashima, K.：“双边激励下 RC 桥柱的抗震性能”Proc.基础设施发展相关环境问题研讨会。

Keerthi Ranasinghe, Hiroshi Mutsuyoshi, Hiroki Uchibori: "Cyclic Testing of Reinforced Concrete Columns with Unbonded Reinforcement"Proceedings of the Japan Concrete Institute. 24-2. 1141-1146 (2002)

Keerthi Ranasinghe、Hiroshi Mutsuyoshi、Hiroki Uchibori：“无粘结钢筋的钢筋混凝土柱的循环测试”日本混凝土协会会议录。