桥梁大学本科方案设计书.docVIP

学生姓名： 文果 学生学号： 200610702232 院（系）： 土木工程学院 年级： 07级道桥二班 指导教师： 袁 鑫 二〇一〇年十二月 摘 要 桥是跨越障碍的通道，随着我国城市建设和高等级公路、道路建设的发展，桥梁的建设也将成为必然的趋势。预应力混凝土简支T型梁桥设计在我国公路上修建很多。 本设计采用预应力混凝土T型梁桥，跨径布置为（12×30）m，主梁为变截面T型梁。跨中梁高为1.80m，支点梁高为1.80m。桥墩为重力式桥墩、桥台。 本文主要阐述了该桥的设计和计算过程。首先对主桥进行总体结构设计，然后对上部结构进行内力、配筋计算，再进行强度、应力及变形验算，最后进行下部结构验算。 具体包括以下几个部分： 1.桥型布置，结构各部分尺寸拟定； 2.选取计算结构简图； 3.恒载内力计算； 4.活载内力计算； 5.荷载组合； 6.配筋计算； 7.预应力损失计算； 8.截面强度验算； 9.截面应力及变形验算； 10.下部结构验算。 关键词 T型简支梁桥，预应力混凝土桥台，桥墩， ABSTRACT Bridge across obstacles corridors, with our urban construction and the high-grade highway, road construction, bridge building will also become the inevitable trend. Pre-stressed Concrete T bridge design teams in the construction of many of our roads. The bridge belongs to the prestressed concreted structuer which is a simple supported beam bridge.The span arrangement is （12×30）m.The superstructure is variable T shaped supported beam bridge.The height of the girder on the support is 1.80m,and the height of the middle is 1.80m too.The pier is gravity pier. The abutment is gravity abutment. This essay focuses on the design and calculation process of the bridge.Firstly, make an overall structure design of the main span.Secondly perform the calculation of the internal force and reinforcing bar on the superstructure.Thirdly,check the intensity,stress and deflection.Finally,check the substructure.. The main points of the design are as the follows. 1.The arrangement of the bridge types; 2.The units partition of the structute; 3.The calculation of the internal force of dead load; 4.The calculation of the internal force of movable load; 5.The combination of every kind of load; 6.The arrangement of prestressed reinforcing bar; 7.The calculation of the prestressed loss; 8.The check of the section intensity; 9.The check of the section stress and deflection; 10.The check the substructure. Key words T shaped supported beam bridge，Prestressed conctete pier，abutment 摘 要 I ABS