Seismic and Isolation Analysis of an Elevated Large-span Beam-supported Aqueduct

HAN Zhong-qi; AO Xuan-nian; PAN Peng; GU Wen-lan; WANG Bao-shun; LI Ke-xian

doi:10.11988/ckyyb.20221284

PDF(8030 KB)

Journal of Changjiang River Scientific Research Institute ›› 2024, Vol. 41 ›› Issue (3) : 186-193. DOI: 10.11988/ckyyb.20221284

Basic Theories And Key Technologies For Major Water Diversion Projects

Seismic and Isolation Analysis of an Elevated Large-span Beam-supported Aqueduct

HAN Zhong-qi¹, AO Xuan-nian², PAN Peng^1,3, GU Wen-lan², WANG Bao-shun¹, LI Ke-xian²

Author information +

History +

Abstract

The site of the Central Yunnan Water Diversion Project is earthquake-prone with high seismic intensity. To ensure the safety of aqueduct facilities against earthquakes, the seismic performance of an elevated large-span beam-supported aqueduct of the Central Yunnan Water Diversion Project was analyzed. ABAQUS was utilized to establish a model of single-span aqueduct in consideration of fluid-structural interaction. Ground motion inputs were selected based on the site’s geological conditions. The elastic-plastic time-histories of aqueducts with pot-type elastomeric pad bearings (PEPBs), lead rubber bearings (LRBs), and friction pendulum bearings (FPBs) were analyzed. Results demonstrate that aqueducts with isolation bearings exhibit a 25.5% lower maximum displacement and a 24.3% smaller maximum bending moment at bottom of the pier compared to aqueducts with PEPBs. Thus, the seismic isolation performance of isolation bearings surpasses that of PEPBs, and the damages in PEPB aqueducts are more severe, primarily concentrated in the areas where the aqueducts come into contact with the bearing and at variable section of the aqueduct wall as well as at the bottom of the piers. Regarding empty aqueducts, those with LRBs experience a 10.4% larger maximum displacement than full aqueducts, accompanied by a 21.4% smaller maximum bending moment at pier bottom. On the other hand, aqueducts with FPBs demonstrate a 20.9% smaller maximum displacement and a 32.2% smaller maximum bending moment at pier bottom compared to full aqueducts. The seismic isolation period of LRBs is significantly affected by the mass of upper structure, while the period of FPBs remains independent of the mass of upper structure. Considering these factors, FPBs are found to be more suitable for aqueducts.

Key words

aqueduct / finite element analysis / elastic-plastic time history analysis / seismic isolation bearing / seismic performance

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

HAN Zhong-qi, AO Xuan-nian, PAN Peng, GU Wen-lan, WANG Bao-shun, LI Ke-xian. Seismic and Isolation Analysis of an Elevated Large-span Beam-supported Aqueduct[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(3): 186-193 https://doi.org/10.11988/ckyyb.20221284

References

[1] 张雨霆, 王义深, 赵利鹏, 等. 长距离隧洞穿越活动断裂带的结构安全监测体系和布置设计[J].长江科学院院报, 2022, 39(12): 82-89.(ZHANG Yu-ting, WANG Yi-shen, ZHAO Li-peng. Structural Safety Monitoring System and Layout Design for Long Distance Tunnel Crossing Active Fault Zone[J]. Journal of Changjiang River Scientific Research Institute, 2022, 39(12): 82-89.(in Chinese))
[2] 崔臻,张延杰,周光新,等.过活动断裂隧洞抗错断适应性结构响应分析[J].长江科学院院报,2022,39(12):90-96,104.(CUI Zhen,ZHANG Yan-jie,ZHOU Guang-xin.Mechanical Behavior of Tunnel Structure Passing Through an Active Fault and Subjected to Fault Rupture[J]. Journal of Changjiang River Scientific Research Institute,2022,39(12):90-96,104.(in Chinese))
[3] 李长春.大型渡槽抗震与隔震研究及应用[D].郑州:华北水利水电大学,2020.(LI Chang-chun.Research and Application of Seismic and Isolation of Large Scale Aqueduct[D]. Zhengzhou: North China University of Water Resources and Electric Power,2020.(in Chinese))
[4] HOUSNER G W. Dynamic Pressures on Accelerated Fluid Containers[J]. Bulletin of the Seismological Society of America, 1957, 47(1): 15-35.
[5] GB 51247—2018, 水工建筑物抗震设计标准[S]. 北京: 中国计划出版社, 2018.(GB 51247—2018, Standard for Seismic Design of Hydraulic Structures[S]. Beijing: China Planning Press, 2018.(in Chinese))
[6] 何俊荣,尤岭,李世平,等.高震区梁式渡槽摩擦摆支座参数敏感性分析[J].人民长江,2022,53(1):142-147.(HE Jun-rong,YOU Ling,LI Shi-ping,et al.Parameter Sensitivity Analysis on Friction Pendulum Bearing for Beam-type Aqueduct in Intensive Earthquake Area[J]. Yangtze River,2022,53(1):142-147.(in Chinese))
[7] 何俊荣, 尤岭, 李世平, 等. 高烈度区梁式渡槽减隔震设计研究[J]. 水利规划与设计, 2019(9): 140-146.(HE Jun-rong, YOU Ling, LI Shi-ping, et al. Study on Seismic Isolation Design of Beam Aqueduct in High Intensity Region[J]. Water Resources Planning and Design, 2019(9): 140-146.(in Chinese))
[8] 祝贺彬. 梁式渡槽的减隔震应用研究[D]. 绵阳: 西南科技大学, 2021.(ZHU He-bin. Study on the Application of a Beam Aqueduct for Seismic Mitigation and Isolation[D]. Mianyang: Southwest University of Science and Technology, 2021.(in Chinese))
[9] 何祥瑞, 张华, 纪爱丽. 基于XFEM的渡槽单向地震动作用下裂纹开展分析[J]. 水资源与水工程学报, 2016, 27(1): 186-189, 194.(HE Xiang-rui, ZHANG Hua, JI Ai-li. Analysis of Crack Growth of Aqueduct under Effect of Single Dimensional Earthquake Force Based on XFEM[J]. Journal of Water Resources and Water Engineering, 2016, 27(1): 186-189, 194.(in Chinese))
[10] 张社荣, 冯奕, 王高辉. 强震作用下大型排架式U型渡槽的损伤破坏分析[J]. 四川大学学报(工程科学版), 2013, 45(1): 37-43.(ZHANG She-rong, FENG Yi, WANG Gao-hui. Seismic Damage Analysis of U-shaped Aqueduct with the Bent-type Structure Subjected to Strong Earthquake[J]. Journal of Sichuan University (Engineering Science Edition), 2013, 45(1): 37-43.(in Chinese))
[11] 李遇春,张龙.渡槽抗震计算若干问题讨论与建议[J].水电能源科学,2013,31(11):136-139.(LI Yu-chun,ZHANG Long.Discussions and Proposals for Several Issues on Seismic-resistance Computation of Flumes[J]. Water Resources and Power,2013,31(11):136-139.(in Chinese))
[12] LI Y, WANG J. A Supplementary, Exact Solution of an Equivalent Mechanical Model for a Sloshing Fluid in a Rectangular Tank[J]. Journal of Fluids and Structures, 2012, 31: 147-151.
[13] GB 50010—2010, 混凝土结构设计规范[S]. 北京: 中国建筑工业出版社, 2011.(GB 50010—2010, Code for Design of Concrete Structures[S]. Beijing: China Architecture & Building Press, 2011.(in Chinese))
[14] SIMULIA. ABAQUS/Standard User’s Manual, Version 6.11[K]. Rhode Island, USA: Dassault Systèmes Simulia Corporation, 2011.
[15] 顾培英,王岚岚,邓昌,等.我国渡槽结构典型破坏特征研究综述[J].水利水电科技进展,2017,37(5):1-8.(GU Pei-ying,WANG Lan-lan,DENG Chang,et al. Review of Typical Failure Characteristics of Aqueduct Structures in China[J]. Advances in Science and Technology of Water Resources,2017,37(5):1-8.(in Chinese))
[16] JGJ 94—2008, 建筑桩基技术规范[S]. 北京: 中国建筑工业出版社, 2008.(JGJ 94—2008, Technical Code for Building Pile Foundations[S]. Beijing: China Architecture & Building Press, 2008.(in Chinese))
[17] Pacific Earthquake Engineering Research Center. PEER Ground Motion Database[DB/OL]. California: Berkley, 2014. https://ngawest2.berkeley.edu.
[18] 杨溥, 李英民, 赖明. 结构时程分析法输入地震波的选择控制指标[J]. 土木工程学报, 2000, 33(6): 33-37.(YANG Pu, LI Ying-min, LAI Ming. A New Method for Selecting Inputting Waves for time-history Analysis[J]. China Civil Engineering Journal, 2000, 33(6): 33-37.(in Chinese))
[19] JT 391—1999, 公路桥梁盆式橡胶支座[S]. 北京: 人民交通出版社, 1999.(JT 391—1999, Pot-type Elastomeric Pad Bearing for Highway Bridge[S]. Beijing: China Communications Press, 1999.(in Chinese))
[20] JT/T 822—2011, 公路桥梁铅芯隔震橡胶支座[S]. 北京: 人民交通出版社, 2012.(JT/T 822—2011, Lead Rubber Bearing Isolator for Highway Bridge[S]. Beijing: China Communications Press, 2012.(in Chinese))