1、 -I- 30m 预应力混凝土简支预应力混凝土简支 T 形梁桥形梁桥 摘要摘要 本设计采用预应力混凝土简支 T 梁结构，其上部结构由主梁、横隔梁、 行车道板，桥面部分和支座等组成，显然主梁是桥梁的主要承重构件。其 主梁通过横梁和行车道板连接成为整体，使车辆荷载在各主梁之间有良好 的横向分布。桥面部分包括桥面铺装、伸缩装置和栏杆等组成，这些构造 虽然不是桥梁的主要承重构件，但它们的设计与施工直接关系到桥梁整体 的功能与安全，这里在本设计中也给予了详细的说明。 本设计主要受跨中正弯矩的控制，当跨径增大时，跨中由恒载和活载 产生的弯矩将急剧增加，是材料的强度大部分为结构重力所消耗，因而限 制的起跨越
2、能力，本设计采用 30m 标准跨径，合理地解决了这一问题。在 设计中通过主梁内力计算、应力钢筋的布置、主梁截面强度与应力验算、 行车道板及支座、墩台等等设计，完美地构造了一座装配式预应力混凝土 简支 T 梁桥，所验算完全符合要求，所用方法均与新规范相对应。本设计 重点突出了预应力在桥梁中的应用，这也正体现了我国桥梁的发展趋势。 关键词关键词 预应力；简支 T 梁；后张法；应力验算 -II- 30 m Prestressed Concrete Simply Supported T Beam Bridge Abstract The design is about a reinforce concr
3、ete simply supported T beam structure, its superstructure by the king post, septum transversum beam, the lane board, the bridge floor part and the support and so on is composed, the obvious king post is the bridge main carrier. Its king post connects into the whole through the crossbeam and the lane
4、 board, enable the vehicles load to have the good traverse between various king posts .Bridge floor part including compositions and so on flooring, expansion and contraction installment and parapet, these structures although is not the bridge main carrier, but their design and the construction relat
5、es the bridge whole directly the function and the security, here has also given the detailed explanation in this design. This design mainly steps the sagging moment control, when the span increases, cross the bending moment which produces by the dead load and the live load the sharp growth, is the m
6、aterial intensity majority of consumes for the structure gravity, thus limits the spanning ability, this design uses the 30m standard span, has solved this problem reasonably. In the design through the king post endogenic force computation, the stress steel bar arrangement, king post section intensity and stress checking calculation, lane board and support, pillar Taiwan and so on designs, a structure assembly type prestressed concrete simple support T beam bridge, the checking calculation comp
