北方交通
北方交通
북방교통
NORTHERN COMMUNICATIONS
2012年
3期
66-68
,共3页
预应力混凝土连续梁桥%抗震性能%反应谱分析%时程分析
預應力混凝土連續樑橋%抗震性能%反應譜分析%時程分析
예응력혼응토련속량교%항진성능%반응보분석%시정분석
Prestressed concrete continuous girder bridge%Earthquake resistant performance%Response spectrum analysis%Time history analysis
依托某跨径布置为（47.5＋85＋47.5）m的预应力混凝土连续梁桥,计算分析了考虑和不考虑桩基桩-土之间的相互影响对预应力混凝土连续梁桥的动力和抗震性能的影响。采用桥梁分析软件MIDAS/Civil 2010建立了该桥的两种三维有限元模型,进行了自振特性分析,并应用反应谱法和时程分析方法计算了该桥的地震响应。分析结果表明,考虑桩基桩-土之间的相互作用使结构变柔,频率减小;顺桥向抗震设计由制动墩控制;考虑和不考虑桩-土之间的相互作用,对桥梁结构影响复杂。
依託某跨徑佈置為（47.5＋85＋47.5）m的預應力混凝土連續樑橋,計算分析瞭攷慮和不攷慮樁基樁-土之間的相互影響對預應力混凝土連續樑橋的動力和抗震性能的影響。採用橋樑分析軟件MIDAS/Civil 2010建立瞭該橋的兩種三維有限元模型,進行瞭自振特性分析,併應用反應譜法和時程分析方法計算瞭該橋的地震響應。分析結果錶明,攷慮樁基樁-土之間的相互作用使結構變柔,頻率減小;順橋嚮抗震設計由製動墩控製;攷慮和不攷慮樁-土之間的相互作用,對橋樑結構影響複雜。
의탁모과경포치위（47.5＋85＋47.5）m적예응력혼응토련속량교,계산분석료고필화불고필장기장-토지간적상호영향대예응력혼응토련속량교적동력화항진성능적영향。채용교량분석연건MIDAS/Civil 2010건립료해교적량충삼유유한원모형,진행료자진특성분석,병응용반응보법화시정분석방법계산료해교적지진향응。분석결과표명,고필장기장-토지간적상호작용사결구변유,빈솔감소;순교향항진설계유제동돈공제;고필화불고필장-토지간적상호작용,대교량결구영향복잡。
Taking a prestressed concrete continuous girder bridge with span of（47.5＋85＋47.5） m as an example,the influence taking mutual influence of pile foundation and pile soil into consideration and not,on dynamic and earthquake resistant performance of prestressed concrete continuous girder bridge is calculated and analyzed.Two kinds of three-dimensional finite element model are established with MIDAS/Civil 2010,a bridge analysis software.Natural vibration is analyzed and earthquake response of the bridge is calculated with response spectrum analysis and time history analysis method.The analysis result shows that the structure is more flexible and frequency is smaller while taking the mutual influence of pile foundation and pile soil into consideration;Aseismatic design along bridge direction is controlled by abutment pier;the influence on bridge structure is complicated when taking mutual influence of pile soil into consideration and not.
