桥梁建设
橋樑建設
교량건설
BRIDGE CONSTRUCTION
2009年
z2期
106-109
,共4页
铁路桥%横向刚度%加固%方案%设计
鐵路橋%橫嚮剛度%加固%方案%設計
철로교%횡향강도%가고%방안%설계
railway bridge%transverse rigidity%strengthening%scheme%design
在分析包神铁路混凝土桥梁检定报告、按现行规范检算和动力计算结果的基础上,得出桥梁横向刚度不足的结论,制定了6种不同类型T形梁桥的加固方案,即:对短跨低高度混凝土T梁采用增设钢筋混凝土横隔板、对16m以上混凝土T梁采用增设预应力混凝土横隔梁的方案.通过加固前后动力计算结果对比,证明该方案加固效果显著,加固后桥梁符合现行规范要求.
在分析包神鐵路混凝土橋樑檢定報告、按現行規範檢算和動力計算結果的基礎上,得齣橋樑橫嚮剛度不足的結論,製定瞭6種不同類型T形樑橋的加固方案,即:對短跨低高度混凝土T樑採用增設鋼觔混凝土橫隔闆、對16m以上混凝土T樑採用增設預應力混凝土橫隔樑的方案.通過加固前後動力計算結果對比,證明該方案加固效果顯著,加固後橋樑符閤現行規範要求.
재분석포신철로혼응토교량검정보고、안현행규범검산화동력계산결과적기출상,득출교량횡향강도불족적결론,제정료6충불동류형T형량교적가고방안,즉:대단과저고도혼응토T량채용증설강근혼응토횡격판、대16m이상혼응토T량채용증설예응력혼응토횡격량적방안.통과가고전후동력계산결과대비,증명해방안가고효과현저,가고후교량부합현행규범요구.
On the basis of analysis of the inspection reports, the checking calculation according to the present specifications and the calculation of the dynamic load of concrete bridges on Baotu-Shenmu Railway, it was concluded that the transverse rigidity of the bridges was not sufficient. The strengthening design schemes for the six kinds of different T-girder bridges were formulated, i. e., for the short span and shallow T-girders of the bridges, the girders would be strengthened by way of adding reinforced concrete diaphragm plates while for the T-girders with span length longer than 16 m, they would be strengthened by way of adding prestressed concrete diaphragm beams. The comparison of the calculation of the dynamic load of the bridges before and after they were strengthened prove that the strengthening effect according to the schemes is significant and the bridges after they were strengthened can meet the requirements in the present specifications.
