考虑入射角影响的H型超高墩连续刚构桥地震易损性研究

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (5) : 230-242.

地震科学与结构抗震

考虑入射角影响的H型超高墩连续刚构桥地震易损性研究

陈士通1, 2, 3, 范鑫1, 2, 甘平平4, 郭超群2, 向敏*4

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Seismic vulnerability of H-type ultra-high pier continuous rigid frame bridge considering effects of incident angle

CHEN Shitong1,2,3, FAN Xin1,2, GAN Pingping4, GUO Chaoqun2, XIANG Min*4

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摘要

相比常规桥梁，H型双柱式超高墩连续刚构桥梁受力更加复杂、高阶振型影响显著、纵横向刚度差异大，地震动入射角是影响其地震响应的关键因素之一，为探究入射角对其易损性的影响，以西部山区某高速铁路三跨超高墩连续刚构桥为研究对象，建立仿真模型开展地震响应分析。基于纵桥向和横桥向开展构件双向易损性分析，同时考虑超高墩、支座对桥梁系统的贡献率，基于一阶可靠度理论构建桥梁复合系统易损性模型，建立桥梁系统易损性曲面，探讨地震动入射角对桥梁系统地震易损性的影响规律。结果表明：纵向地震激励下超高墩相比中、低墩墩身中部损伤概率明显提升，且横桥向峰值曲率与能力需求比不同步，仅凭峰值曲率判断超高墩薄弱部位不能合理评估其抗震性能；墩底部位最不利入射角区间为0°~15°和165°~180°，墩身横系梁部位最不利区间为60°~120°，墩顶部位最不利区间在不同地震动强度下存在变化；支座地震易损性对地震动强度和入射角的变化较为敏感，不同工况地震激励下呈现出不同的损伤趋势且相比桥墩更易出现损伤，设计时应注重横向挡块的力学性能；桥梁系统地震易损性与地震动入射角表现出较强的相关性，最不利入射角区间为75°~105°和255°~285°。

Abstract

Compared with conventional bridges, H-type double-column super-high pier continuous rigid frame bridge has more complicated stress, significant influence of high-order vibration modes and great difference in longitudinal and transverse stiffness. The incident angle of ground motion is one of the key factors affecting its seismic response. In order to explore the influence of incident angle on its fragility, a simulation model is established to analyze the seismic response of a three-span super-high pier continuous rigid frame bridge of a high-speed railway in western mountainous areas. Based on the longitudinal and transverse bridge directions, the bi-directional Fragility analysis of components is carried out, and the contribution rate of super-high piers and bearings to the bridge system is considered. Based on the first-order reliability theory, the Fragility model of bridge composite system is constructed, and the fragility surface of bridge system is established, and the influence law of earthquake incidence angle on the seismic fragility of bridge system is discussed. The results show that the damage probability of the middle part of the ultra-high pier under longitudinal earthquake excitation is obviously higher than that of the middle and low piers, and the peak curvature of the transverse bridge is out of sync with the capacity demand ratio, so it is not reasonable to evaluate the seismic performance of the ultra-high pier only by judging the weak part of the peak curvature. The most unfavorable incident angles at the bottom of pier are 0~15 and 165~180, and the most unfavorable ones at the cross beam of pier body are 60~120, and the most
unfavorable ones at the top of pier vary under different earthquake intensities. The seismic fragility of bearing is sensitive to the change of earthquake intensity and incident angle, and it presents different damage trends under different working conditions, and it is more prone to damage than pier, so the mechanical properties of transverse stop should be paid attention to in design. The seismic fragility of bridge system shows a strong correlation with the incidence angle of ground motion, and the most unfavorable incidence angles are 75~105 and 255~285.

导出引用

陈士通1, 2, 3, 范鑫1, 2, 甘平平4, 郭超群2, 向敏4. 考虑入射角影响的H型超高墩连续刚构桥地震易损性研究[J]. 振动与冲击, 2025, 44(5): 230-242

CHEN Shitong1, 2, 3, FAN Xin1, 2, GAN Pingping4, GUO Chaoqun2, XIANG Min4. Seismic vulnerability of H-type ultra-high pier continuous rigid frame bridge considering effects of incident angle[J]. Journal of Vibration and Shock, 2025, 44(5): 230-242

参考文献

[1] 陈盈, 张乐, 张文学, 等. 桥隧相连超高墩连续梁桥纵向弹性地震响应特性研究[J]. 振动工程学报, 2020, 33(5): 1024-1034.
CHEN Ying, ZHANG Le, ZHANG Wenxue. Longitudinal elastic seismic response characteristics of super-high pier continuous girder bridges connected with tunnels[J]. Journal of Vibration Engineering, 2020, 33(5): 1024-1034.
[2] 陈盈, 郭祎晖, 张乐, 等. 桥隧相连超高墩连续刚构桥地震响应特性研究[J]. 公路, 2023, 68(1): 152-157.
CHEN Ying, GUO Yihui, ZHANG Le, et al. Study on seismic response characteristics of super-high pier continuous rigid frame bridge connected by bridge and tunnel[J]. Highway, 2023, 68(1): 152-157.
[3] 王少剑, 高树青, 赵冲, 等. 装配式超高墩连续刚构桥碰撞响应及影响研究[J]. 建筑结构, 2023, 53(S2): 1038-1045.
WANG Shaojian, GAO Shuqing, ZHAO Chong, et al. Research on pounding response and influence of continuous rigid frame bridge with fabricated super high piers with grouted sleeve connection[J]. Building Structure, 2023, 53(S2): 1038-1045.
[4] 邵长江, 漆启明, 韦旺, 等. 设置黏滞阻尼器的超高墩大跨铁路连续钢桁梁桥纵向减震性能研究[J]. 中国铁道科学, 2021, 42(6): 27-38.
SHAO Changjiang, QI Qiming, WEI Wang, et al. Study on longitudinal seismic mitigation performance of a long-span railway continuous steel truss girder bridge with ultra-high piers using fluid viscous dampers[J]. China Railway Science, 2021, 42(6): 27-38.
[5] 漆启明, 邵长江, 黄辉, 等. 基于BRB的铁路双柱式超高墩连续梁桥横向减震研究[J]. 振动与冲击, 2022, 41(7): 182-192.
QI Qiming, SHAO Changjiang, HUANG Hui, et al. Transverse seismic mitigation of railway continuous girder bridge with double-column ultra-high piers based on BRBs[J]. Journal of Vibration and Shock, 2022, 41(7): 182-192.
[6] 郝晓光, 杨未蓬, 唐辉. 超高墩大跨度刚构-连续梁桥抗震性能研究[J]. 世界桥梁, 2020, 48(4): 35-39.
HAO Xiaoguang, YANG Weipeng, TANG Hui. Study of seismic performance of long-span rigid frame continuous girder bridge with high-rise piers[J]. World Bridges, 2020, 48(4): 35-39.
[7] 吴文朋, 李立峰, 王连华, 等. 基于IDA的高墩大跨桥梁地震易损性分析[J]. 地震工程与工程振动, 2012, 32(3): 117-123.
WU Wenpeng, LI Lifeng, WANG Lianhua, et al. Evaluation of seismic vulnerability of high-pier long-span bridge using incremental dynamic analysis[J]. Earthquake Engineering and Engineering Dynamics, 2012, 32(3): 117-123.
[8] 董俊, 单德山, 张二华, 等. 非规则连续刚构桥地震易损性分析[J]. 西南交通大学学报, 2015, 50(5): 845-851+878.
DONG Jun, SHAN Deshan, ZHANG Erhua, et al. Seismic fragility of irregular continuous rigid frame bridge[J]. Journal of Southwest Jiaotong University, 2015, 50(5): 845-851+878.
[9] 高泽亮, 夏修身, 黄耀斌, 等. 近断层地震动下可更换构件铁路高墩易损性分析[J]. 铁道科学与工程学报, 2022, 19(9): 2682-2690.
GAO Zeliang, XIA Xiushen, HUANG Yaohui, et al. Fragility analysis of railway high pier with replaceable components under near fault ground motions[J]. Journal of Railway Science and Engineering, 2022, 19(9): 2682-2690.
[10] 吴文朋, 李立峰. 桥梁结构系统地震易损性分析方法研究[J]. 振动与冲击, 2018, 37(21): 273-280.
WU Wenpeng, LI Lifeng. System seismic fragility analysis methods for bridge structures[J]. Journal of Vibration and Shock, 2018, 37(21): 273-280.
[11] 龚俊, 支旭东, 邵永波, 等. 土木工程结构地震入射方向性效应研究进展[J/OL]. 工程力学: https://kns.cnki.net/kcms2/detail/11.2595.O3.20230731.1211.018.html.
GONG Jun, ZHI Xudong, SHAO Yongbo, et al. State-of-the-art of research on seismic incident directionality effect of civil engineering structures[J]. Engineering Mechanics. DOI: 10.6052/j.issn.1000-4750.2023.03.0166.
[12] BANERJEE BASU S, SHINOZUKA M. Effect of Ground Motion Directionality on Fragility Characteristics of a Highway Bridge[J]. Advances in Civil Engineering, 2011, 2011(1): 536171-1-13.
[13] REZAEI H, ARABESTANI S, AKBARI R, et al. The effects of earthquake incidence angle on the seismic fragility of reinforced concrete box-girder bridges of unequal pier heights[J]. Structure and Infrastructure Engineering, 2022, 18(2): 278-293.
[14] 夏雪, 徐略勤, 张超, 等. 地震激励方向对简支斜交桥地震响应的影响[J]. 土木工程与管理学报, 2020, 37(3): 141-146,173.
XIA Xue, XU Lueqin, ZHANG Chaochao, et al. Influence of seismic excitation direction on the seismic response of simply-supported skewed bridge[J]. Journal of Civil Engineering and Management, 2020, 37(3): 141-146,173.
[15] NOORI H R, MEMARPOUR M M, YAKHCHALIAN M, et al. Effects of ground motion directionality on seismic behavior of skewed bridges considering SSI[J]. Soil Dynamics and Earthquake Engineering, 2019, 127: 105820-1-17.
[16] YANG C S W. Seismic fragility analysis of skewed bridges in the central southeastern United States[J]. Engineering Structures, 2015, 83: 116-128.
[17] ABDEL-MOHTI A. EFFECT OF SKEW ANGLE ON SEISMIC VULNERABILITY OF RC BOX-GIRDER HIGHWAY BRIDGES[J]. International Journal of Structural Stability and Dynamics, 2013, 13(6): 1350013-1-24.
[18] 冯睿为, 劳天鹏, 邓通发, 等. 基于构件合力的曲线梁桥最不利激励方向确定[J]. 同济大学学报(自然科学版), 2019, 47(3): 301-308.
FENG Ruiwei, LAO Tianpeng, DENG Tongfa, et al. Resultant Response-based Method for Assessing the Critical Excitation Direction of Horizontally Curved Bridges[J]. Journal of Tongji University(Natural Science), 2019, 47(3): 301-308.
[19] JEON J S, DESROCHES R, KIM T, et al. Geometric parameters affecting seismic fragilities of curved multi-frame concrete box-girder bridges with integral abutments[J]. Engineering Structures, 2016, 122: 121-143.
[20] SARRAF SHIRAZI R, PEKCAN G, ITANI A. Analytical Fragility Curves for a Class of Horizontally Curved Box-Girder Bridges[J]. Journal of Earthquake Engineering, 2018, 22(5): 881-901.
[21] MANGALATHU S, CHOI E, PARK H C, et al. Probabilistic Seismic Vulnerability Assessment of Tall Horizontally Curved Concrete Bridges in California[J]. Journal of Performance of Constructed Facilities, 2018, 32(6): 04018080-1-11.
[22] PAHLAVAN H, ZAKERI B, AMIRI G G, et al. Probabilistic Vulnerability Assessment of Horizontally Curved Multiframe RC Box-Girder Highway Bridges[J]. Journal of Performance of Constructed Facilities, 2016, 30(3): 04015038-1-12.
[23] ANAGNOSTOPOULOS S A. Equivalent viscous damping for modeling inelastic impacts in earthquake pounding problems[J]. Earthquake Engineering & Structural Dynamics, 2004, 33(8): 897-902.
[24] 陈笑宇, 王东升, 付建宇, 等. 近断层地震动脉冲特性研究综述[J]. 工程力学, 2021, 38(8): 1-14+54.
CHEN Xiaoyu, WANG Dongsheng, FU Jianyu, et al. State-of-the-art review on pulse characteristics of near-fault ground motions[J]. Engineering Mechanics, 2021, 38(8): 1-14, 54.
[25] Shome N, Cornell C A. Probabilistic seismic demand analysis of nonlinear structures[R]. Report No. RMS -35，RMS Program. Stanford University Stanford, CA, 1999.
[26] VAMVATSIKOS D, CORNELL C A. Incremental dynamic analysis[J]. Earthquake Engineering & Structural Dynamics, 2002, 31(3): 491-514.
[27] ZHANG J, HUO Y. Evaluating effectiveness and optimum design of isolation devices for highway bridges using the fragility function method[J]. Engineering Structures, 2009, 31(8): 1648-1660.
[28] NIELSON B G, DESROCHES R. Seismic fragility methodology for highway bridges using a component level approach[J]. Earthquake Engineering & Structural Dynamics, 2007, 36(6): 823-839.
[29] 陈旭, 李建中, 刘笑显. 墩身高阶振型对高墩地震反应影响[J]. 同济大学学报(自然科学版), 2017, 45(2): 159-166.
CHEN XU, LI Jianzhong, LIU Xiaoxian. Seismic performance of tall piers influenced by higher mode effects of piers[J]. Journal of Tongji University(Natural Science), 2017, 45(2): 159-166.
[30] 卢皓, 管仲国, 李建中. 高阶振型对高墩桥梁抗震性能的影响及其识别[J]. 振动与冲击, 2012, 31(17): 81-85+98.
LU Hao, GUAN Zhongguo, LI Jianzhong. Effect of higher modal shapes on aseismic performance of a bridge with high piers and its identification[J]. Journal of Vibration and Shock, 2012, 31(17): 81-85+98.