Seismic Performance Evaluation of RC Hollow Piers under Level II Earthquake by Hybrid Loading Tests

混合加载试验评价二级地震下RC空心墩抗震性能

• 批准号: 10450167
• 负责人: IEMURA Hirokazu
• 金额: $ 9.02万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10450167/
• 关键词: Hollow section; Concrete pier; Hybrid loading test; Cyclic loading test; Shear deformation; Loading history; 高耐震性能; 残留変形; 鉄筋コンクリート橋脚; ハイブリッド地震応答実験; 変形成分分離

In this research, the seismic performance of concrete piers with hollow sections were investigated. From this research, the following results are listed :(a) From the results of cyclic loading tests, it is found that the shear span ratio has a great influence on the failure pattern and deformation capacity. Therefore it is important to check the deformation performance of short piers of bridges across valley areas, since they usually consist of piers with different heights.(b) Under cyclic loading, it cannot be ignored a shear component of deformation of RC hollow piers.(c) From the results of hybrid earthquake loading tests, it was observed that the hysteretic response was stable and it can dissipate input energy by the hysteretic action. The RC hollow piers were found to have a good performance under earthquake motions if appropriate amount of hoops is arranged.(d) When inputting the Kobe JMA record, the pier responded up to the ultimate state in the early stages of loading. As the result, the restoring forces in the positive and negative displacement side were different. This restoring forces of hybrid experiment were different to that of static loading tests. This results suggest that the loading history has a great influence of the failure process of RC structures, and the new experimental method have to be developed to assess the effect of the loading history due to earthquakes.(e) The shear behavior of RC hollow piers is not neglected. Therefore the analysis which takes only account for the flexural deformation has the limitation for investigating the behavior. It is important to develop the analytical method which can take into account the interaction between flexure and shear, and the cyclic loading.

本研究对空心截面混凝土桥墩的抗震性能进行了研究。研究结果如下：(a)从循环加载试验结果发现，剪跨比对破坏模式和变形能力有很大影响。因此，跨河谷地区桥梁短墩通常由不同高度的桥墩组成，对其变形性能进行校核具有重要意义。(b)在循环荷载作用下，RC空心桥墩变形的剪力分量不可忽视。 c) 从混合地震加载试验的结果可以看出，滞回响应是稳定的，并且可以通过滞回作用耗散输入能量。研究发现，如果布置适量的箍筋，RC空心桥墩在地震作用下具有良好的性能。(d)当输入神户JMA记录时，桥墩在加载的早期阶段就响应到了极限状态。结果，正负位移侧的恢复力不同。混合实验的恢复力与静载试验的恢复力不同。结果表明，加载历史对RC结构的破坏过程有很大影响，必须开发新的试验方法来评估地震加载历史的影响。(e) RC空心墩的剪切性能并没有被忽视。因此，仅考虑弯曲变形的分析对于研究行为具有局限性。开发能够考虑弯曲和剪切之间的相互作用以及循环载荷的分析方法非常重要。

项目成果

TAKAHASHI,Y.and IEMURA, H.: "Inelastic Seismic Performance of RC Tall Piers with Hollow Section"Proc.of 12th World Conference on Earthquake Engineering. No.1353. (2000)

TAKAHASHI,Y.和 IEMURA, H.：“RC 空心截面高墩的非弹性抗震性能”第十二届世界地震工程学会论文集。

F.Watanabe et al.: "Analytical Method for Predicting the Response of Tied Concrete Columns to Seismic Loading"Proceedings of 12th World Conference on Earthquake Engineering. No.-162 (2000)

F.Watanabe 等：“预测系杆混凝土柱对地震荷载响应的分析方法”第 12 届世界地震工程会议论文集。

家村浩和ほか: "鋼管・コンクリート複合構造橋脚の耐震性能に関する載荷実験" 第10回日本地震工学シンポジウム論文集. 2099-2104 (1998)

Hirokazu Iemura等：“钢管/混凝土组合结构桥墩抗震性能荷载实验”第10届日本地震工程学会论文集2099-2104（1998）。

TAKAHASHI,Y.: "Earthquake Design and Construction of Tall Composite Bridge Piers"Proc.of 12th World Conference on Earthquake Engineering. 889 (2000)

TAKAHASHI,Y.：“高组合桥墩的地震设计与施工”第十二届世界地震工程大会论文集。

高橋良和: "初期大変形後のRC橋脚の荷重-変位関係"土木学会第55回年次学術講演会講演概要集. 1. I-B213 (2000)

高桥义一：“初始大变形后RC桥墩的荷载-位移关系”日本土木工程学会第55届学术年会摘要1.I-B213（2000）。