Article(id=1241791798041969023, tenantId=1146029695717560320, journalId=1241701559352995854, issueId=1241791788986471392, articleNumber=null, orderNo=null, doi=10.13197/j.eeed.2025.0310, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1710518400000, receivedDateStr=2024-03-16, revisedDate=1716998400000, revisedDateStr=2024-05-30, acceptedDate=null, acceptedDateStr=null, onlineDate=1773995836029, onlineDateStr=2026-03-20, pubDate=1751212800000, pubDateStr=2025-06-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773995836029, onlineIssueDateStr=2026-03-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773995836029, creator=13701087609, updateTime=1773995836029, updator=13701087609, issue=Issue{id=1241791788986471392, tenantId=1146029695717560320, journalId=1241701559352995854, year='2025', volume='45', issue='3', pageStart='1', pageEnd='231', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773995833869, creator=13701087609, updateTime=1773996997624, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241796670220993006, tenantId=1146029695717560320, journalId=1241701559352995854, issueId=1241791788986471392, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241796670220993007, tenantId=1146029695717560320, journalId=1241701559352995854, issueId=1241791788986471392, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=118, endPage=126, ext={EN=ArticleExt(id=1241791799610638733, articleId=1241791798041969023, tenantId=1146029695717560320, journalId=1241701559352995854, language=EN, title=Sensitivity analysis of seismic demand parameters of pile-columns of frame piers in sandy soil sites, columnId=null, journalTitle=Earthquake Engineering and Engineering Dynamics, columnName=null, runingTitle=null, highlight=null, articleAbstract=
The pile-columns of frame piers is a widely used substructure in bridge engineering. The current seismic design specifications for bridges require the pile to remain elastic following the capacity protection principle. Therefore, identifying the sensitivity of various design parameters to seismic demands of the piles is an important prerequisite for the capacity protection design of the piles. For this purpose, based on a coupled soil-pile-structure finite element modeling method, the sensitive parameters of pile-columns of frame piers to pile seismic demand are studied. Firstly, distribution mechanisms of bending moment under different earthquake intensity are investigated, together with understanding the contribution of ground surface tie beam to withstand the pile-shaft bending moment. On this basis, standardized seismic demand indicators representing the maximum bending moment of the pile, the corresponding depth, and the recommended reinforcement range are proposed. The sensitivity of tie beam, pile, column and soil parameters to the seismic demands of piles is analyzed. Based on the sensitivity parameter definition standards derived in this paper, the high and low sensitivity parameters of the pile seismic demand are identified. The research results can provide a reference for the seismic design of bridges supported by extended pile-shaft frames with ground surface tie beams in cohesionless soils based on pile capacity protection principle.
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桩柱式框架墩是桥梁工程中广泛采用的下部结构形式,而现行桥梁抗震设计规范按能力保护原则要求桩身在地震下保持弹性。因此,揭示各设计参数对桩身地震需求的敏感性是进行桩身能力保护设计的重要前提。为此,基于土-桩-结构一体化建模方法,对工程中常见的砂土场地带土面系梁桩柱式框架墩桥梁的桩身地震需求参数敏感性开展理论研究。首先研究了不同地震强度下砂土场地桩柱弯矩分布发展规律以及土面系梁对桩身弯矩的分担作用和变化规律;在此基础上,提出了表征桩身地震弯矩最大值、埋深以及加强配筋范围的标准化地震需求指标,全面分析了系梁、桩柱及土体参数对桩身地震需求的敏感性,基于推导提出的敏感参数界定标准,确定了桩身地震需求的高、低敏感参数。研究成果可为砂土场地带土面系梁桩柱式框架墩基于桩身能力保护的抗震设计提供参考。
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杨光怡(2000—),女,硕士研究生,主要从事桥梁抗震研究。E-mail:yangguangyi@tongji.edu.cn
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3.浙江数智交院科技股份有限公司,浙江 杭州 310006)])], figs=[ArticleFig(id=1241802941477229144, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=EN, label=Fig. 1, caption=
Finite element model of pile-columns of frame piers, figureFileSmall=K7H6INgVBE3fLYQBi9AfkQ==, figureFileBig=ZgDbyOEx3vEBhSAlOsUr1Q==, tableContent=null), ArticleFig(id=1241802941619835494, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=CN, label=图1, caption=
桩柱式框架墩有限元模型, figureFileSmall=K7H6INgVBE3fLYQBi9AfkQ==, figureFileBig=ZgDbyOEx3vEBhSAlOsUr1Q==, tableContent=null), ArticleFig(id=1241802941716304497, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=EN, label=Fig. 2, caption=
Acceleration response spectra of 40 ground motions and design response spectra, figureFileSmall=jokQkfdKg4GR+OYsbe9ynA==, figureFileBig=3LExNkC8I6GLPPEKNtSTgQ==, tableContent=null), ArticleFig(id=1241802941955379845, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=CN, label=图2, caption=
40条地震记录加速度反应谱及设计反应谱, figureFileSmall=jokQkfdKg4GR+OYsbe9ynA==, figureFileBig=3LExNkC8I6GLPPEKNtSTgQ==, tableContent=null), ArticleFig(id=1241802942068626068, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=EN, label=Fig. 3, caption=
Acceleration, velocity and displacement time histories of Chi-Chi ground motions, figureFileSmall=OItk+xMRu4NBhMNAdUWxmQ==, figureFileBig=TCPObaU0UVZvXQ0Y9AR4JA==, tableContent=null), ArticleFig(id=1241802942177677981, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=CN, label=图3, caption=
Chi-Chi地震动加速度、速度和位移时程, figureFileSmall=OItk+xMRu4NBhMNAdUWxmQ==, figureFileBig=TCPObaU0UVZvXQ0Y9AR4JA==, tableContent=null), ArticleFig(id=1241802942290924203, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=EN, label=Fig. 4, caption=
Moment-curvature curves of tie beam and pier cross-section, figureFileSmall=0k2wp9SHsyYeL3zBVlYIaw==, figureFileBig=xH0SpwLAvtN4hOQrGjPIiw==, tableContent=null), ArticleFig(id=1241802942416753338, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=CN, label=图4, caption=
系梁及桥墩截面弯矩-曲率曲线, figureFileSmall=0k2wp9SHsyYeL3zBVlYIaw==, figureFileBig=xH0SpwLAvtN4hOQrGjPIiw==, tableContent=null), ArticleFig(id=1241802942559359686, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=EN, label=Fig. 5, caption=
Distribution of pile-shaft bending moment under Chi-Chi ground motion of different PGA levels, figureFileSmall=ZxtZ+mnftcelkyKlr3r9pQ==, figureFileBig=TDhoO+GmP6wzza3Sv3vICA==, tableContent=null), ArticleFig(id=1241802944073503447, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=CN, label=图5, caption=
不同PGA的Chi-Chi地震动下桩柱弯矩分布图, figureFileSmall=ZxtZ+mnftcelkyKlr3r9pQ==, figureFileBig=TDhoO+GmP6wzza3Sv3vICA==, tableContent=null), ArticleFig(id=1241802944211915489, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=EN, label=Fig. 6, caption=
Standardized bending moment distribution of pile-columns of frame piers, figureFileSmall=zREGAix40xvtnij64anG6g==, figureFileBig=1Gg6kcLi88KYuYOPSJbcGQ==, tableContent=null), ArticleFig(id=1241802944287412968, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=CN, label=图6, caption=
标准化桩柱弯矩分布图, figureFileSmall=zREGAix40xvtnij64anG6g==, figureFileBig=1Gg6kcLi88KYuYOPSJbcGQ==, tableContent=null), ArticleFig(id=1241802944388076280, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=EN, label=Fig. 7, caption=
ΔI-SI relation curves for |ΔO| = 10%, figureFileSmall=2LAKWvG71sL5UEHMXcIV3Q==, figureFileBig=x7F3V2vD1jINR65/xHxN5w==, tableContent=null), ArticleFig(id=1241802944534876932, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=CN, label=图7, caption=
|ΔO| = 10%时的ΔI-SI关系曲线, figureFileSmall=2LAKWvG71sL5UEHMXcIV3Q==, figureFileBig=x7F3V2vD1jINR65/xHxN5w==, tableContent=null), ArticleFig(id=1241802944694260497, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=EN, label=Fig. 8, caption=
Sensitivity analysis results of parameters for pile bending moment demand, figureFileSmall=5ygZjC4yGU9lVpIAigET1A==, figureFileBig=0l+TxBo5jw+YYFugr1CRcA==, tableContent=null), ArticleFig(id=1241802944836866843, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=CN, label=图8, caption=
桩身弯矩需求参数敏感性分析结果, figureFileSmall=5ygZjC4yGU9lVpIAigET1A==, figureFileBig=0l+TxBo5jw+YYFugr1CRcA==, tableContent=null), ArticleFig(id=1241802944945918761, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=EN, label=Fig. 9, caption=
Standardized bending moment distribution of pile-shaft with different tie beam reinforcement ratio under Chi-Chi ground motion, figureFileSmall=gE5qwZHp/v/7Q/RO+xc3Ww==, figureFileBig=3IoK94olHmjZEPwaa3Qqgg==, tableContent=null), ArticleFig(id=1241802945063359287, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=CN, label=图9, caption=
Chi-Chi地震动下不同系梁配筋率桩柱标准化弯矩分布图, figureFileSmall=gE5qwZHp/v/7Q/RO+xc3Ww==, figureFileBig=3IoK94olHmjZEPwaa3Qqgg==, tableContent=null), ArticleFig(id=1241802945210159941, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=EN, label=Table 1, caption=
Values of parameters for sensitivity analysis
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| 参数 | 符号 | 标准工况取值 | 下限值 | 上限值 |
|---|
| 砂土相对密实度 | Dr/% | 60.0 | 40.0 | 80.0 |
| 标准化墩高 |  | 6 | 4 | 8 |
| 标准化桩径 |  | 1.2 | 1.1 | 1.3 |
| 墩配筋率 | ρlc/% | 1.00 | 0.75 | 1.25 |
| 墩配箍率 | ρsc/% | 1.00 | 0.75 | 1.25 |
| 标准化系梁截面高度 |  | 0.9 | 0.8 | 1.0 |
| 标准化系梁长度 |  | 4 | 3 | 5 |
| 系梁配筋率 | ρlt/% | 1.00 | 0.75 | 1.25 |
| 系梁配箍率 | ρst/% | 1.00 | 0.75 | 1.25 |
| 轴压比 | Rac | 0.15 | 0.10 | 0.20 |
), ArticleFig(id=1241802945361154900, tenantId=1146029695717560320, journalId=1241701559352995854, articleId=1241791798041969023, language=CN, label=表1, caption=
敏感性分析参数取值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 符号 | 标准工况取值 | 下限值 | 上限值 |
|---|
| 砂土相对密实度 | Dr/% | 60.0 | 40.0 | 80.0 |
| 标准化墩高 |  | 6 | 4 | 8 |
| 标准化桩径 |  | 1.2 | 1.1 | 1.3 |
| 墩配筋率 | ρlc/% | 1.00 | 0.75 | 1.25 |
| 墩配箍率 | ρsc/% | 1.00 | 0.75 | 1.25 |
| 标准化系梁截面高度 |  | 0.9 | 0.8 | 1.0 |
| 标准化系梁长度 |  | 4 | 3 | 5 |
| 系梁配筋率 | ρlt/% | 1.00 | 0.75 | 1.25 |
| 系梁配箍率 | ρst/% | 1.00 | 0.75 | 1.25 |
| 轴压比 | Rac | 0.15 | 0.10 | 0.20 |
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