科技大学桥梁工程毕业设计（论文）摘要本设计为如海河桥主桥上部结构,本桥主跨度是 33m+55m+33m，主梁截面为单箱三室，拱肋为钢管混凝土结构，吊杆为柔性吊杆。悬臂桥施工方法用平衡悬臂施工，拱肋钢管采纳分段吊装方式施工。设计荷载为公路-Ⅰ 级，设计抗震烈度 7 度。主桥上部结构计算按施工阶段采纳“桥梁博士 V3.0”进行计算，结合工程实际情况，施工计算共分了 39 个受力阶段。设计中主桥按先边跨合拢，然后中跨合拢的顺序考虑，合拢温度严格控制在 15~16℃。拟定主梁纵、横断面尺寸；采纳桥梁博士结构设计程序计算施工阶段和成桥后的主梁各控制截面的恒载力、活载力、温度力与基础沉降引起的力，分别按承载能力极限状态和正常使用极限状态进行荷载效应组合；估算预应力钢束数量并确定束数；布置钢束位置；对各控制截面进行强度、应力验算，各项验算均满足《公路钢筋混凝土与预应力混凝土桥涵设计规》要求。关键词：预应力混凝土梁拱组合桥；悬臂浇注施工；分段吊装施工；吊杆；作用效应组合；桥梁博士；Q765978417AbstractThe design is for the Ru-Hai-He bridge topside structure the span of which is 33m+55m +33m.and the section is single box girder cross-section of three rooms, rib of steel concrete structure, flexible boom. The cantilever bridge use the method of Balanced Cantilever construction ,Arch steel construction with sub-lifting means.As aresult of the design load for one, we use seven for security.Calculation of the main bridge structure used by the construction phase, "Dr. Bridges V3.0" calculated, combined with the actual situation in the project, construction of the calculation is divided into 39 by the power stage. The design of the bridge by the first side of the main cross-fold, after the lifting of the interim anchor, the last in order to consider cross-fold, close up to strictly control the temperature in the 15 ~ 16 ℃.The development of the main longitudinal beams, cross-sectional size; the use of the structural design of the bridge, Dr. calculated into th...
