4*15m装配式预应力简支梁结构桥设计+CAD图纸
关键词： ：： ：预应力，简支梁桥，空心板，钻孔灌注桩。
Abstract Prestressed concrete hollow slab bridge occupies an important position in the historyof architecture of in our country.At present, permanent for small and medium span Bridges,highway Bridges and city Bridges, as far as possible using the prestressed concrete hollowslab.Because this kind of Bridges can use local materials, construction industrialization,good durability, strong adaptability, good integrity, and other advantages. To determinePrestressed Concrete Hollow Slab selected as the design of the bridge.Prefabricated prestressed beam structure is used in the design models for the 4 x 15m.Its upper structure from the main beam, carriageways board, deck and bearingcomponents, the main beam of the bridge main load-bearing elements.Substructure by thebearing, capping beams, piers, piles composed jointly support from the entire substructure.In the design, the calculation of bridge superstructure analysis focuses on the bridge deadload and live load forces, and to be arranged in accordance with the norms liveload;simultaneous beam reinforcement calculation, the estimated loss of prestressing steelstrand; finally the main beam intensity, the normal stress and the principal stress checking.Substructure adopt Bored based pier, and were on the pier and pile foundation forcomputing and checking
Keywords: Prestressed ，Simply supported beam bridge，Hollow，Bored piles.
目 目 目 目 录 录 录 录
第一章 第一章 第一章 第一章 绪论 绪论绪论 绪论 1 11 1
第二章 第二章 第二章 第二章 方案拟订与比选 方案拟订与比选 方案拟订与比选 方案拟订与比选.. 2 22 2
2.1 设计资料.. 2
2.2 设计方案.. 2
第三章 第三章 第三章 第三章 主梁截面计算 主梁截面计算 主梁截面计算 主梁截面计算 4 44 4
3.1 基本资料.. 4
3.1.1 主要技术指标.4
3.1.2 材料规格 4
3.1.3 设计规范 4
3.2 截面几何尺寸图..5
3.2.1 桥面横断面布置图5
3.2.2 板块结构几何尺寸5
3.3 毛截面几何特性计算6
3.3.1 毛截面面积6
3.3.2 毛截面重心位置.6
3.3.3 空心板毛截面对其重心轴的惯矩6
3.4 作用效应计算 7
3.4.1 永久作用效应计算7
3.4.2 可变作用效应计算9
3.3.3 作用效应组合18
3.4 预应力钢束的估算及布置21
3.4.1 预应力钢筋数量的估算..21
3.4.2 预应力钢筋布置..23
3.4.3 普通钢筋数量的估算及布置24
3.5 换算截面的几何特性计算..26
3.5.1 换算截面的面积 o A ..26
3.5.2 换算截面的重心位置..26
3.5.3 换算截面的惯性矩 o I ..27
3.5.4 换算截面的弹性抵抗矩.27