30m预应力简支T梁-毕业设计.doc

精品资料 精品资料 精品资料 精品资料 哈 尔 滨 理 工 大 学 毕 业 论 文 题 目：30m 预应力混凝土简支T形梁桥设计 院 、 系： 建筑工程学院土木工程系 30m预应力混凝土简支T形梁桥 摘要 本设计接受预应力混凝土简支T梁结构，其上部结构由主梁、横隔梁、行车道板，桥面局部和支座等组成，明显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。桥面局部包括桥面铺装、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平安，这里在本设计中也赐予了具体的说明。 本设计主要受跨中正弯矩的把握，当跨径增大时，跨中由恒载和活载产生的弯矩将急剧增加，是材料的强度大局部为结构重力所消耗，因而限制的起跨越力量，本设计接受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，完善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，所用方法均与新标准相对应。本设计重点突出了预应力在桥梁中的应用，这也正表达了我国桥梁的进展趋势。 关键词 预应力；简支T梁；后张法；应力验算 30 m Prestressed Concrete Simply Supported T Beam Bridge Abstract The design is about a reinforce concrete 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 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 relates 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 material 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 s