通幽桥毕设计桥梁毕业设计.doc

毕 业 设 计 题 目： 通幽桥毕业设计 学 院： 土木工程学院 专 业： 土木工程 姓 名： 学 号： 011409125 指导老师： 完成时间： 2013年05月30日 摘 要 根据桥址处的具体情况，并结合设计要求，拟定出三个比选方案。分别是预应力混凝土连续梁桥、钢筋混凝土简支梁桥、钢筋混凝土连续刚构桥。根据安全、适用、经济、美观的原则确定钢筋混凝土简支梁桥为推荐方案，桥梁总长93m。主梁采用T形截面。施工方法采用满堂支架施工法。计算结构的恒载内力，求得恒载内力下结构的弯矩图及剪力图；计算各控制截面内力影响线，并按最不利情况进行加载，求得活载作用下内力包络图。定义基础沉降组，按最不利组合求得基础沉降引起的内力。施加温度荷载，求得温度荷载下内力。并进行荷载组合，根据各控制截面内力进行了估束和配筋计算，并对梁体进行具体的钢筋布置。最后，对各控制截面进行了强度、抗裂性、应力和变形验算。 关键词：钢筋混凝土；简支梁桥；荷载组合 Abstract According to the specific situation at the bridge site, combined with the design requirements, to work out more than three alternatives. Are continuous prestressed concrete beam bridge, bridge of reinforced concre beams reinforced concrete continuous rigid frame bridge. According to security, application, economic, aesthetic principles of prestressed concrete continuous beam bridge to determine the recommended program Bridge length 93m . Girder with t-shaped cross section. Construction methods using full framing construction method. Computing structure dead load internal force, internal force of dead load is obtained under the structure of the bending moment diagram and shear force diagram; Control section internal force influence line is calculated, and according to the most unfavorable situation to load, internal force envelope diagram under the influence of live load are obtained. Definition of foundation settlement group, according to the obtained the most unfavorable combination internal forces caused by foundation settlement. The internal force under temperature load, temperature load is obtained. And load combination, according to each control cross section internal force of the estimation and reinforcement calculation, beam and the beam body concrete reinforcement layout. Finally, to each control cross section strength, crack resistance, stress and deformation