模板简支箱梁桥大学设计.docVIP

摘 要 锦州龙栖湾新区滨海桥位于辽西街、辽东街与滨海路交汇处，它的建成可以进一步拉动城市南扩缓解现有桥梁交通的拥挤状况Abstract The Longqiwan zone of Jinzhou located in the cross of Liaoxi street , Liaodong street and Binhai road . It built a new city can be further boost the city southward，This bridge completed will solve the other bridge built over crowded and busy phenomenon, and will bring economic opportunity to Jinzhou. The bridge is simply supported by priestessed concrete Box-beam, which is 90 meters length, three span structure , and the single-hole span 30 meters, the bridge width 16 meters width, and for the bidirectional four traffic lanes. In the design of the bridge, we have completed the following work, such as bridge structure endogen force and distortion which caused by the dead load and the live load function, and have analyzed the performance of the bridge when it is affected by the dead load and the live load stress. Simultaneously，we carry on the design calculation which to the entire bridge the pre-stressed steel ties. Design approach of the constant load, completed in live load caused internal force and deformation of the structure; The prestressed slab bridge and analysis in constant load and under the influence of live load and the mechanical properties of prestressed steel, the approach to design and calculation of the beam. The design according to the comprehensive implementation the policy, the economy, suitable, artistic, and safe, approach to the basic function request and the use premise requests. Keywords: Box-beam ; prestressed concrete ; three span structure; pre-stressed steel ties; 目录 第一章 绪 论 1 1.1. 设计技术指标 1 第二章 方案比选 4 2.1 桥型方案 4 2.2 方案比选 5 2.3 方案确定 6 第三章 上部结构 7 3.1 设计资料及构造布置 7 3.1.1 设计资料 7 3.1.2 箱型梁构造形式及相关参数设计 7 3.2 主梁内力计算 10 3.2.1 恒载内力计算（边主梁） 10 3.2.2 活载内力计算 12 3.2.3 内力组合 20 3.3 预应力刚束的估算及布置 21 3.3.1 跨中截面钢束的估算和确定 21 3.3.2 预应力钢束布置 21 3.4 主梁截面几何特性 26 3.4.1 截面面积及惯矩计算 26 3.4.2 截面静距计算 30 3.4.3 截面几何特性总表 34 3.5 钢束预应力损失计算 35 3.5.1 预应力钢束与管道臂之间的摩擦引起的预应力损失 35 3.5.2 由锚具变形、钢束回缩引起的预应力损失 3