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时间:2019-11-26
《中小跨径公路桥梁抗震设计理念_王克海》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、DOI:10.15951/j.tmgcxb.2012.09.012土木工程学报第45卷第9期Vol.45No.92012年9月Sep.2012CHINACIVILENGINEERINGJOURNAL中小跨径公路桥梁抗震设计理念王克海韦韩李茜李悦(交通运输部公路科学研究院,北京100088)摘要:总结汶川地震中不同桥型的性能表现,重点比较简支梁桥与连续梁桥、梁桥和拱桥的受损情况,并基于实际震害经验,提出桥型选择的一些原则;基于抗震计算无法得到结构响应精确值的事实,建议抗震设计中采取“多道设防,分级耗能”的抗震设防理念,重点讲述保险
2、丝式单元的应用,提出桥梁抗震设计的“一可三易(可控、易检、易修、易换)”原则,即“损伤部位及损伤程度可控,损伤部位易检,损伤构件易修,破坏构件易换”,基于“多道设防,分级耗能”和“一可三易”原则,建议中小跨径梁桥在破坏性地震作用下,支座作为保险丝式单元优先损坏,桥墩可出现易修复的塑性铰,桩基不能损伤。最后对一个实际工程,阐述孔跨布置的选择理念、桥墩抗剪能力的计算过程及双层抗震挡块的构造措施。研究成果可解决实际桥梁抗震设计工作中的部分问题。关键词:桥梁工程;桥梁抗震;抗震设计;多道设防,分级耗能;一可三易;中小跨径桥梁中图分类号:
3、5文献标识码:A文章编号:1000-131X(2012)+U442.509-0115-07PhilosophiesonseismicdesignofhighwaybridgesofsmallormediumspansWangKehaiWeiHanLiQianLiYue(ResearchInstituteofHighwayoftheMinistryofTransport,Beijing100088,China)Abstract:Theseismicperformancesofdifferenttypesofbridgesinthe
4、Wenchuanearthquakearesummarized,withthecomparisonsfocusingonthedamagesofsimplysupportedgirderbridgesandcontinuousgirderbridges,beambridgesandarchbridges,andbasedontheexperiences,severalfundamentalprinciplesonbridge-typeselectionarepresented.Basedonthefactthatstructur
5、alresponsecannotbeaccuratelycalculated,theimplementationof“multilevelfortification,hierarchicalenergy-consumption”philosophyisrecommended,theapplicationoffuseelementsishighlighted,andtheprinciplenamed"one-canandthree-easy"isproposed,whichmeans,indevastatingearthquake
6、s,"theinjurycomponentandextentofinjurycanbecontrolled,theinjurypositioniseasytocheck,theinjurycomponentiseasytorepair,thedamagedcomponentiseasytochange","thedamageofbearingasafuseelementshouldbethepriority,easilyrepairableplastichingescanappearinpiers,pilesshouldbein
7、tact".Finally,arealcaseisdiscussedindetail,thespancombination,theshearcapacitycalculationofpier,anddoubleshearkeysarestudied.Theresultsofpresentstudyareexpectedtobeusefulforpracticalproblems.Keywords:bridgeengineering;bridgeseismicresistance;seismicdesign;multilevelf
8、ortification,hierarchicalenergy-consumption;one-canandthree-easy;bridgeofsmallormediumspanE-mail:kh.wang@rioh.cn笔者总结了近百年来的桥梁震害,特别是汶
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