整体式桥台桥梁受力性能研究

发布时间：2018-05-16 01:37

本文选题：整体式桥台桥梁 + 桩土相互作用　；参考：《东北林业大学》2014年硕士论文

【摘要】：随着我国国民经济的快速发展,公路和城市道路的运输量和货物周转量大幅度增长,车辆的载重吨位和车流密度增长得相当迅速。在如此大吨位、高流量车辆荷载的冲击下,传统桥梁的损伤现象十分普遍,其中伸缩装置的破坏最为严重,对车辆的行驶安全造成了威胁。整体式桥台桥梁取消了伸缩装置,将上部结构与墩台固结为整体,提高了抵抗自然灾害的能力,降低了施工成本,加快了施工进度。拥有诸多优点的整体式桥台桥梁受到了国内外学者的关注并进行了大量的试验研究和实桥应用。然而由于整体式桥台桥梁的实际受力情况非常复杂,导致目前国内外整体式桥台桥梁的计算方法依然没有统一定论,其设计和施工大多依赖逐渐积攒的经验技术和少有的文献资料,并且国内关于整体式桥台桥梁受力性能的研究文献屈指可数,针对北方寒区的研究更是没有文献可查,尚属空白阶段,因此本文结合北方寒区气候特点,对整体式桥台桥梁受力性能的研究是十分必要的,能够推动该桥型更深层次的研究和更广泛的应用。本文以富裕工业园区跨线桥为依托工程,对台后填土、桩周土进行试验,得到土体的各项物理力学性能指标和参数,采用TDV软件建立桥梁有限元模型,并分析验证其合理性；对整体式桥台桥梁进行了长期监控试验,分析了墩台顶的纵向位移与温差的关系,分别分析上部结构和下部结构在温差作用下的内力分布及变化规律；通过静载试验,对比荷载试验中的主梁横向分布系数、跨中挠度和跨中应力实测数据与理论计算数据,分析了整体式桥台桥梁上部结构在汽车荷载下的受力特点,结合桥台顶和边墩顶转角数据、下部结构测点应力数据和理论计算数据,研究了汽车荷载下整体式桥台桥梁在上部结构与墩台固结处的变形及结构刚度情况,并分析了下部结构的内力分布规律。
[Abstract]:With the rapid development of China's national economy, the traffic volume and freight turnover of highway and urban roads have increased by a large margin, and the capacity of vehicles and the density of vehicle flow have increased rapidly. Under the impact of such large tonnage and high flow vehicle loads, the damage phenomenon of traditional bridges is very common, in which the damage of telescopic devices is the most serious, which poses a threat to the safety of vehicles. The integral abutment bridge cancels the telescopic device and consolidates the superstructure with the pier and abutment as a whole improves the ability to resist natural disasters reduces the construction cost and speeds up the construction progress. The monolithic abutment bridge with many advantages has been paid much attention by scholars at home and abroad, and a large number of experimental studies and practical bridge applications have been carried out. However, due to the complexity of the actual stress on the monolithic abutment bridge, there is still no unified conclusion on the calculation method of the monolithic abutment bridge at home and abroad. Most of its design and construction rely on the accumulated experience and technology and rare literature, and the domestic research on the mechanical performance of monolithic abutment bridge is few. Therefore, it is necessary to study the mechanical performance of the monolithic abutment bridge in combination with the climatic characteristics of the northern cold region, which can promote the deeper research and wider application of the bridge type. In this paper, the physical and mechanical properties of the soil are obtained by means of experiments on the embankment and pile-surrounding soil based on the overpass bridge in the Fujiu Industrial Park. The finite element model of the bridge is established with TDV software, and the rationality of the model is analyzed and verified. The long-term monitoring test of monolithic abutment bridge is carried out, the relationship between longitudinal displacement and temperature difference of pier and abutment is analyzed, the distribution and variation of internal force of superstructure and substructure under the action of temperature difference are analyzed, and the static load test is carried out. Compared with the measured data of transverse distribution coefficient of main beam, mid-span deflection and mid-span stress in load test and theoretical calculation data, the stress characteristics of the superstructure of monolithic abutment bridge under automobile load are analyzed. Based on the data of abutment top and side pier top turning angle, the stress data of substructure measuring points and theoretical calculation data, the deformation and stiffness of integral abutment bridge at the consolidation of superstructure and pier abutment under automobile load are studied. The law of internal force distribution of substructure is analyzed.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.21;U441

【共引文献】