3×70米预应力混凝土连续钢构设计
摘 要
本设计是根据设计任务书的要求和《公路桥规》的规定,对3×70米预应力混凝土连续钢构设计进行设计，根据计算书和实际的地质环境情况对整个桥梁的结构尺寸和计算方法进行了初步的设计和拟定。
在设计中，根据计算书的要求该桥设计为连续梁桥，上部结构采用预应力钢筋混凝土连续箱形梁桥，桥面行车道板根据弹性薄板理论将桥面板确定为单向板和悬臂板两部分进行计算，并对其进行了内力及配筋计算。桥梁主梁的计算着重分析了桥梁在使用工程中恒载以及活载的作用，采用Midas进行建模计算，进行了梁的配筋计算，估算了钢绞线的各种预应力损失，并进行预应力阶段和使用阶段主梁截面的强度和变形验算、锚固区局部强度验算和挠度的计算。
下部结构采用以钻孔灌注桩为基础的双墩柱，按照偏心受压构件分别其进行了相关的设计计算和验算。支座采用的是盆式橡胶支座，桥台采用的是重力式桥台，在设计中对其进行了相关的验算。最后对本桥梁的主要的施工工艺进行了简单明了的说明。
关键词：预应力混凝土，连续梁桥，箱型截面，钻孔灌注桩，钢绞线，桥墩桥台
ABSTRACT
This design is based on the requirements of the design task book and the provisions of the "Highway Bridge Regulations", the design of 3 × 70 m prestressed concrete continuous steel structure design, according to the calculation of the actual situation and the geological environment of the bridge structure and size The method was initially designed and developed.
In the design, according to the requirements of the calculation of the bridge design for the continuous bridge, the upper structure of the prestressed reinforced concrete continuous box girder bridge, bridge deck lane plate according to the theory of elastic plate to determine the deck as a one-way plate and cantilever plate Two parts of the calculation, and its internal force and reinforcement calculation. The calculation of the main girder of the bridge focuses on the analysis of the heavy load and the live load of the bridge in the use of the project. The calculation of the beam is carried out by Midas, and the various prestress losses of the strand are estimated and carried out. Prestressed phase and the use of the main section of the beam section of the strength and deformation check, the anchorage area of local strength checking and deflection calculation.
The lower structure adopts the double pier column based on the bored pile, and the relevant design calculation and calculation are carried out according to the eccentric compression members. The bearing is a pot-type rubber bearing, the abutment is a gravity abutment, in the design of its relevant checks. Finally, the main construction of the bridge for a simple and clear description of the process.
Keywords: prestressed concrete, continuous girder bridge, box section, bored pile, strand, bridge pier
的计算 66
计算 69
