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，标准钢筋混凝土柱在强烈的近场地面运动作用下，在塑性铰区域发生塑性变形。虽然侧向约束可以有效地提高结构的塑性变形能力，但震后很可能需要对损伤进行修复。本研究旨在研制一种在塑性铰处嵌入橡胶层的柱，使其在不损伤混凝土的情况下具有4%的漂移变形能力。除了钢筋外，柱中还安装了预应力筋，以抵抗拉力。对11根钢筋混凝土柱进行了反复荷载试验。对测试结果进行了纤维成分分析。通过试验和分析发现，橡胶层内置柱对混凝土塑性铰区域的损伤非常有限。因此，尽管实现无损伤柱的实现还有许多问题需要解决，但仍有许多问题有待解决，从而完成了无损伤变形至4%的无损伤柱的研制。

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。