文档介绍：湖南科技大学
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,拱肋钢管采用分段吊装方式施工。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用“”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;采用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内力、活载内力、温度内力及基础沉降引起的内力,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《公路钢筋混凝土及预应力混凝土桥涵设计规范》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;
Q765978417
Abstract
The design is for the Ru-Hai-He bridge topside structure the span of which is 33m+55m + 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 a result of the design load for one, we use seven for security.
Calculation of the main bridge structure used by the construction phase, "Dr. Bridges " 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 the construction phase and after the bridge girder cross-section of the control of internal forces of the dead load, live load internal forces, temperature, and the basis for the settlement of internal forces caused by internal forces, respectively, according to carrying capacity limit state and serviceability limit state bination effects; to estimate the number of pre-stressed beam of steel and to determine the number of beam; layout steel beam position; cross-section of the control strength, stress check, the check are to meet the "Highway of