A Study of Estimation for Steel Bridge Piers considering torsion effects

考虑扭转效应的钢桥墩估算研究

基本信息

批准号：
12450183
负责人：
USAMI Tsutomu
金额：
$ 9.6万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450183/
关键词：
Steel Bridge Piers Local Buckling Torsional deformation Seismic Performance Elasto-plastic Analysis Cyclic loading tests Out-of-plane deformation Serviceability 弾塑性有限変立解析

项目摘要

The present study is aimed at an estimation of steel bridge piers subjected to out-of-plane cyclic loading. For this purpose, Elastoplastic analysis was carried out at fast considering torsion effect Next, these numerical results were verified by the seismic performance tests of Inverted L-shaped steel bridge piers. Finally, the experimental functions estimating the strength and deformation capacity for steel bridge piers subjected to out-of-plane cyclic loadings are developed. The following conclusions can be obtained :1) With the increase in eccentric distance, the loading-carrying capacity of the columns is greatly reduced.2) Comparison of the buckling modes indicates that the out-of-plane bending moment dominates the hysteretic behavior of the columns, and the inward deformation on the eccentric side is attributed to the effect of the cyclic twisting moment.3) The seismic performance testing system for inverted L-shaped steel bridge piers was developed.4) The eccentricity ratio e/r is selected as 0, 2 and 3, and its influences on the inelastic behavior, ultimate strength and ductility are investigated. It is found that the Inverted L-shaped steel bridge pier deformaed largly in the in^plane direction although the pier was loaded in the out-of-plane direction.5) From the analytical results, it is realized that the eccentric vertical load and cyclic loading pattern will cause a significant in-plane displacement, and in the case of inverted L-shaped piers, strength deterioration is greater than that of T-shaped piers.6) An extensive parametric analysis is performed to propose empirical formulas in order to evaluate strength and ductility of inverted L-shaped box-section steel bridge piers.

本研究的目的是估计受到面外循环载荷的钢桥墩。为此，考虑到扭转效果，在快速考虑的情况下进行了弹性塑料分析，通过反向L形钢桥墩的地震性能测试验证了这些数值结果。最后，开发了估计经面外循环载荷的钢桥墩的强度和变形能力的实验函数。可以获得以下结论：1）随着偏心距离的增加，列的负载能力大大降低。2）比较屈曲模式表明，屈曲矩弯曲力矩占主导地位的触发力量，占主导地位的综合行为，并在偏心方面的偏心效果归因于偏心的效果。 4）选择偏心率E/R为0、2和3，并研究了其对非弹性行为，最终强度和延展性的影响。 It is found that the Inverted L-shaped steel bridge pier deformaed largly in the in^plane direction although the pier was loaded in the out-of-plane direction.5) From the analytical results, it is realized that the eccentric vertical load and cyclic loading pattern will cause a significant in-plane displacement, and in the case of inverted L-shaped piers, strength deterioration is greater than that of T-shaped piers.6) An extensive进行参数分析以提出经验公式，以评估倒置L形盒式钢桥墩的强度和延展性。

项目成果

期刊论文数量（26）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Chusilp, P., Usami, T., Ge, H.B.: "Analytical study on strength and ductility of stiffened box-shaped steel members subjected to shear loading"Journal of Structural Engineering,JSCE. (掲載予定). (2002)

Chusilp, P.、Usami, T.、Ge, H.B.：“受剪切载荷作用的加劲箱形钢构件的强度和延展性的分析研究”，结构工程学报，JSCE（即将出版）。

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通讯作者：

青木微彦, 錦木真一, 渡辺俊輔, 鈴木森晶, 宇佐美勉, 葛漢彬: "面外繰り返し水平力を受ける逆L型鋼製箱形断面橋脚の強度と変形能に関する実験的研究"土木学会論文集. No.724/I-62. 213-223 (2003)

Mihiko Aoki，Shinichi Nishikiki，Shunsuke Watanabe，Akira Suzuki Mori，Tsutomu Usami，Akira Katsuran：“反复平面外水平力作用下倒L形钢箱形截面桥墩的强度和变形能力的实验研究”论文集日本土木工程师学会第 724/I-62 (2003) 号。