河南科学
河南科學
하남과학
HENAN SCIENCE
2013年
9期
1458-1462
,共5页
多跨连续梁桥%合拢顺序%成桥阶段%应力对比值%挠度对比值
多跨連續樑橋%閤攏順序%成橋階段%應力對比值%撓度對比值
다과련속량교%합롱순서%성교계단%응력대비치%뇨도대비치
multi-span continuous bridge%sequence of construct closure%finished bridge state%values of beam stress for different closure sequence%values of beam deformation for different closure sequence
目前对于多跨连续梁桥合拢方案设计大多采用参考类似桥梁的合拢方案，方案唯一确定。然而实际施工中，施工单位往往会根据实际施工情况提出不同于设计的合拢方案，合拢意味着体系转化，因此不同的合拢顺序对应不同的成桥状态，此时需要重新进行施工阶段仿真计算，故此设计中分析多种可行的合拢方案显得尤为重要。以衡阳湘江大桥为例，考虑了四种不同合拢方案，并对各种合拢方案下的成桥阶段的应力及位移做了对比分析，为类似桥梁设计提供了借鉴。
目前對于多跨連續樑橋閤攏方案設計大多採用參攷類似橋樑的閤攏方案，方案唯一確定。然而實際施工中，施工單位往往會根據實際施工情況提齣不同于設計的閤攏方案，閤攏意味著體繫轉化，因此不同的閤攏順序對應不同的成橋狀態，此時需要重新進行施工階段倣真計算，故此設計中分析多種可行的閤攏方案顯得尤為重要。以衡暘湘江大橋為例，攷慮瞭四種不同閤攏方案，併對各種閤攏方案下的成橋階段的應力及位移做瞭對比分析，為類似橋樑設計提供瞭藉鑒。
목전대우다과련속량교합롱방안설계대다채용삼고유사교량적합롱방안，방안유일학정。연이실제시공중，시공단위왕왕회근거실제시공정황제출불동우설계적합롱방안，합롱의미착체계전화，인차불동적합롱순서대응불동적성교상태，차시수요중신진행시공계단방진계산，고차설계중분석다충가행적합롱방안현득우위중요。이형양상강대교위례，고필료사충불동합롱방안，병대각충합롱방안하적성교계단적응력급위이주료대비분석，위유사교량설계제공료차감。
Presently,the closure project of each multi-span continuous bridge mostly refers to the similar bridges. Usually the closure project determined sure one certain closure sequence,while the construction unit might present different closure designs according to actual situation. Bridge structure system transformed during the closure,so different closure sequence formed different completion state of bridge and a new computational model needed to be built according to the actual bridge structure. Analyzing different closure projects during the design process was important. Taken Hengyang Xiangjiang bridge as example,the stress and displacement of different four closure projects at the finished bridge state were comparatively analyzed,which provided reference for similar bridges.
