Seismic behavior prediction and post-earthquake performance evaluation of bridge superstructures

桥梁上部结构地震行为预测及震后性能评价

• 批准号: 13450183
• 负责人: ABE Masato
• 金额: $ 5.44万
• 依托单位: The University of Tokyo
• 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 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450183/
• 关键词: Post-earthquake performance; bridge; performance based design; pounding; restrainer; bearing; buffer; three-dimensional analysis; 要求性能; 都市内高架橋; 地震時挙動; 3次元動的解析; 衝突解析; 画像計測; 兵庫県南部地震

A report of 1995 Kobe earthquake showed that impact damage at ends of girders and fails of supports can impede traffics of rescue works. To precisely analyze the behaviors of bridges with poundings and evaluate the effectiveness of pounding mitigation measures, a 3D model for whole bridge structures including pounding and pounding mitigation devices is constructed. Especially, unseating of bridge girders/decks during earthquakes is very harmful to the safety and serviceability of bridges. Evidence from recent severe earthquakes indicates that in addition to damage along longitudinal direction, lateral displacement and rotation of bridge girders caused by pounding can also lead to unseating.To analyze this effect, a 3D model of pounding is constructed at the first half of the research. In addition, for a precise analysis of pounding effects, 3D modeling of whole bridge structures is also in demand. This research presents a model for 3D pounding problems of bridge girders with friction. Experiments of pounding were conducted to verify this model. 3D nonlinear models of whole bridge structures have also been adopted. A general-purpose dynamic analysis program for bridges and conducts computations of pounding among a three-span steel bridge has been implemented. The applicability of the pounding model is illustrated with the results. Then, at the last half of the research, three-span steel elevated bridge has been chosen for a case study. In addition, the peak gap size between girders and maximum relative displacements of supporters are employed for serviceability evaluation.

1995年神户地震的一份报告表明，梁端的冲击破坏和支撑的失效会阻碍救援工作的进行。为了准确分析桥梁的冲击行为，评估减振措施的有效性，建立了包括冲击和减振装置在内的桥梁整体结构的三维模型。特别是在地震作用下，桥梁梁/桥面的脱座对桥梁的安全性和使用寿命是非常有害的。近年来强烈地震的证据表明，除了纵向破坏外，冲击引起的桥梁横向位移和旋转也会导致桥梁脱座。为了分析这种影响，在研究的前半部分建立了一个三维冲击模型。此外，为了精确分析冲击效应，还需要对整个桥梁结构进行三维建模。本文提出了考虑摩擦的桥梁主梁三维冲击问题的模型。通过冲击实验验证了该模型的正确性。还采用了整体桥梁结构的三维非线性模型。编制了通用的桥梁动力分析程序，并对某三跨钢桥进行了冲击计算。算例说明了冲击模型的适用性。然后，在研究的后半部分，选择了三跨钢高架桥作为案例研究。此外，还采用梁与梁之间的峰隙大小和支座的最大相对位移进行了适用性评价。

项目成果

M. Abe, K. Yanagino, Y. Fujino, and S. Hashimoto: "Damage Analysis of three-span continuous girder bridges in 1995 Kobe Earthquake"Proceedings of the Japan Societyof Civil Engineers. No.668. 83-101 (2001)

M. Abe、K. Yanagino、Y. Fujino 和 S. Hashimoto：“1995 年神户地震中三跨连续梁桥的损坏分析”日本土木工程学会论文集。

P.Zhu, M.ABE, Y.FUJINO: "A 3D General-Purpose Dynamic Analysis System for Bridges with Pounding Effects between Girders"Theory and Implementation, Third DIANA World Conference on Finite Elements in Civil Engineering Applications. 413-420 (2002)

P.Zhu、M.ABE、Y.FUJINO：“A 3D General-Purpose Dynamic Analysis System for Bridges with Pounding Effects Between Girders”理论与实现，第三届 DIANA 土木工程应用有限元世界会议。

P.Zhu, M.Abe, Y.Fujino: "A 3D Contact-friction Model for Pounding at Bridges durting Earthquakes"Proceedings of The First M.I.T. Conference on Computational Fluid and Solid Mechanics. 575-578 (2001)

P.Zhu、M.Abe、Y.Fujino：“地震期间桥梁冲击的 3D 接触摩擦模型”第一届麻省理工学院论文集

水口知樹, 阿部雅人, 藤野陽三: "1999年集集地震における地表地震断層による落橋現象の再現と対策の試み"土木学会論文集. No.710/I-60. 257-271 (2002)

Tomoki Mizuguchi、Masato Abe、Yozo Fujino：“1999 年 Chi-Chi 地震期间地表地震断层引起的桥梁倒塌现象的再现及其对策的尝试”日本土木工程师学会会刊第 710/I-60 号。 257-271（2002）

水口知樹, 阿部雅人, 藤野陽三: "1999年集集地震における地表地震断層による落橋現象の再現と対策の試み"土木学会論文集. No.710/1-60. 257-271 (2002)

Tomoki Mizuguchi、Masato Abe、Yozo Fujino：“1999 年 Chi-Chi 地震期间地表地震断层引起的桥梁倒塌现象的再现及其对策的尝试”日本土木工程学会会刊第 710/1-60 号。 257-271（2002）