Article(id=1208052406315749982, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1208052403727864410, articleNumber=1671-1807(2025)12-0023-07, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1735920000000, receivedDateStr=2025-01-04, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1765951738193, onlineDateStr=2025-12-17, pubDate=1750780800000, pubDateStr=2025-06-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1765951738193, onlineIssueDateStr=2025-12-17, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1765951738193, creator=13701087609, updateTime=1765951738193, updator=13701087609, issue=Issue{id=1208052403727864410, tenantId=1146029695717560320, journalId=1146123222451335185, year='2025', volume='25', issue='12', pageStart='1', pageEnd='400', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1765951737577, creator=13701087609, updateTime=1765951864175, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1208052934781281080, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1208052403727864410, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1208052934781281081, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1208052403727864410, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=23, endPage=29, ext={EN=ArticleExt(id=1208052406693237347, articleId=1208052406315749982, tenantId=1146029695717560320, journalId=1146123222451335185, language=EN, title=Vulnerability Analysis of Long-span Continuous Rigid Frame Bridge under Multi-directional Seismic Excitations, columnId=1151876674645226399, journalTitle=Science Technology and Industry, columnName=Technology Innovation, runingTitle=null, highlight=null, articleAbstract=
Regarding th special seismic response characteristics exhibited by super long-span bridge, a long-span continuous rigid-frame bridge was focused on as the research subject. A three-dimensional finite element model was established, and incremental dynamic analysis (IDA) was performed to systematically investigate the dynamic response characteristics under bi-directional and tri-directional seismic excitations. The results indicate that under bi-directional seismic excitation, the main pier exhibits a 43% probability of slight damage at PGA=0.4g. After incorporating vertical seismic excitation, the main pier shows a 22% probability of slight damage at PGA=0.2g, with the exceedance probability of complete damage state increasing by approximately 25%. Regarding the bearing system, the introduction of vertical seismic excitation significantly accelerates the damage progression rate, reaching a 100% probability of slight damage at PGA=0.4g.
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针对超高墩大跨度桥梁在地震作用下表现出的特殊响应特性,以某大跨度连续刚构桥为研究对象,建立三维有限元分析模型,采用增量动力分析法,系统研究了双向及三向地震作用下动力响应特性。研究结果表明:双向地震作用下,主墩在PGA=0.4g时轻微损伤概率达43%,引入竖向地震动后,主墩在PGA=0.2g时即出现22%的轻微损伤概率,完全损伤状态的超越概率增加约25%;支座系统方面,竖向地震动的引入使损伤发展速率显著提高,在PGA=0.4g时轻微损伤概率即达100%。
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田石柱(1962—),男,河北沧州人,博士,教授,研究方向为地震工程。
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赵峰(2000—),男,江苏南京人,硕士研究生,研究方向为地震工程
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赵峰(2000—),男,江苏南京人,硕士研究生,研究方向为地震工程
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| 损伤等级 | 损伤程度 | 损伤具体形式 | 指标范围 |
| Ⅰ级 | 轻微损伤 | 最外侧钢筋发生屈服 | φy<φs≤φsh |
| Ⅱ级 | 中等损伤 | 最外侧纵筋拉应变小于0.55倍的钢筋极限拉应变 | φsh<φs≤0.55φsu |
| Ⅲ级 | 严重损伤 | 最外侧纵筋拉应变小于钢筋极限拉应变 | 0.55φsu<φs≤φsu |
| Ⅳ级 | 完全破坏 | 最外侧纵筋拉应变大于极限拉应变 | φs>φsu |
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损伤状态及量化指标
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| 损伤等级 | 损伤程度 | 损伤具体形式 | 指标范围 |
| Ⅰ级 | 轻微损伤 | 最外侧钢筋发生屈服 | φy<φs≤φsh |
| Ⅱ级 | 中等损伤 | 最外侧纵筋拉应变小于0.55倍的钢筋极限拉应变 | φsh<φs≤0.55φsu |
| Ⅲ级 | 严重损伤 | 最外侧纵筋拉应变小于钢筋极限拉应变 | 0.55φsu<φs≤φsu |
| Ⅳ级 | 完全破坏 | 最外侧纵筋拉应变大于极限拉应变 | φs>φsu |
), ArticleFig(id=1208083795950014931, tenantId=1146029695717560320, journalId=1146123222451335185, articleId=1208052406315749982, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 截面位置 | 曲率/(rad·m-1) |
| 完全损伤 | 轻微损伤 | 中等损伤 | 严重损伤 |
| 1号墩墩底 | 1.16×10-4 | 1.85×10-4 | 2.76×10-4 | 9.13×10-3 |
| 2号墩墩底 | 1.34×10-4 | 1.89×10-4 | 2.88×10-4 | 9.63×10-3 |
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双向地震作用下桥墩关键截面曲率界限值
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| 截面位置 | 曲率/(rad·m-1) |
| 完全损伤 | 轻微损伤 | 中等损伤 | 严重损伤 |
| 1号墩墩底 | 1.16×10-4 | 1.85×10-4 | 2.76×10-4 | 9.13×10-3 |
| 2号墩墩底 | 1.34×10-4 | 1.89×10-4 | 2.88×10-4 | 9.63×10-3 |
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