土木工程与管理学报
土木工程與管理學報
토목공정여관이학보
JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY·URBAN SCIENCE
2014年
3期
1-6
,共6页
组合梁%剪力钉%集束式%均布式
組閤樑%剪力釘%集束式%均佈式
조합량%전력정%집속식%균포식
composite beam%shear studs%cluster distribution%uniform distribution
本文针对港珠澳大桥6×85 m组合连续梁桥开展受力性能分析,采用Beam188梁单元模拟剪力钉、Sol-id45实体单元模拟混凝土桥面板、Shell163壳单元模拟钢箱梁,在最不利边跨建立了精细的空间有限元模型(按剪力钉的实际数量建立梁单元),采用生死单元法模拟港珠澳大桥的实际施工过程,即大节段整体吊装、简支变连续、支点顶升与回落、支点纵向预应力张拉以及二期恒载的全过程。按照剪力钉集束式布置和剪力钉均布式布置两种方式,分别计算了钢-混组合梁桥受力性能和剪力钉的受力状况。计算结果表明：两种布置形式下组合梁挠度、混凝土桥面板和钢梁应力基本相同；组合荷载工况下集束式与均布式布置剪力钉最大纵向剪力分别为64.49 kN和67.98 kN,最大拉拔力分别为45.44 kN和43.67 kN,都满足正常使用要求,为钢-混组合梁桥剪力钉集束式布置提供分析依据。
本文針對港珠澳大橋6×85 m組閤連續樑橋開展受力性能分析,採用Beam188樑單元模擬剪力釘、Sol-id45實體單元模擬混凝土橋麵闆、Shell163殼單元模擬鋼箱樑,在最不利邊跨建立瞭精細的空間有限元模型(按剪力釘的實際數量建立樑單元),採用生死單元法模擬港珠澳大橋的實際施工過程,即大節段整體弔裝、簡支變連續、支點頂升與迴落、支點縱嚮預應力張拉以及二期恆載的全過程。按照剪力釘集束式佈置和剪力釘均佈式佈置兩種方式,分彆計算瞭鋼-混組閤樑橋受力性能和剪力釘的受力狀況。計算結果錶明：兩種佈置形式下組閤樑撓度、混凝土橋麵闆和鋼樑應力基本相同；組閤荷載工況下集束式與均佈式佈置剪力釘最大縱嚮剪力分彆為64.49 kN和67.98 kN,最大拉拔力分彆為45.44 kN和43.67 kN,都滿足正常使用要求,為鋼-混組閤樑橋剪力釘集束式佈置提供分析依據。
본문침대항주오대교6×85 m조합련속량교개전수력성능분석,채용Beam188량단원모의전력정、Sol-id45실체단원모의혼응토교면판、Shell163각단원모의강상량,재최불리변과건립료정세적공간유한원모형(안전력정적실제수량건립량단원),채용생사단원법모의항주오대교적실제시공과정,즉대절단정체조장、간지변련속、지점정승여회락、지점종향예응력장랍이급이기항재적전과정。안조전력정집속식포치화전력정균포식포치량충방식,분별계산료강-혼조합량교수력성능화전력정적수력상황。계산결과표명：량충포치형식하조합량뇨도、혼응토교면판화강량응력기본상동；조합하재공황하집속식여균포식포치전력정최대종향전력분별위64.49 kN화67.98 kN,최대랍발력분별위45.44 kN화43.67 kN,도만족정상사용요구,위강-혼조합량교전력정집속식포치제공분석의거。
This paper carries out mechanical performance analysis against the 6 × 85 m composite continuous beam bridge of the Hongkong-Zhuhai-Macau Bridge. Beam188 beam element is used to simulate shear studs, Solid45 solid element is used to simulate concrete bridge deck, and Shell163 shell element is used to simulate steel box girder. The fine spatial finite element models are established in the most unfavorable side span, and beam elements are established in the element models according to the actual number of the shear studs. Life and death element method is used to simulate the actual construction process of the Hongkong-Zhuhai-Macau Bridge, that is large segment integral lifting, converting simply-support in continuous, fulcrum lifting-up and fallbacking, fulcrum longitudinal prestressed tension and secondary dead load. The mechanical performance of the steel-concrete composite beam bridge and the force status of shear studs are calculated according to the two kinds of arrangement of cluster distribution and uniform distribution of shear studs. The results show that:the deflection of composite beam, the stress of concrete bridge and steel box girder are basically the same;under the combined load condition, the maximum longitudinal shear force of shear studs under cluster distribution and uniform distribution are 64. 49 kN and 67. 98 kN, and the maximum pulling force are 45. 44 kN and 43. 67 kN, which meet the normal requirements and provide basis of analysis for the cluster distribution of shear studs of steel-concrete composite beam bridge.
