高墩大跨混凝土連續(xù)剛構(gòu)橋抗震性能研究.pdf

1、中國地震局工程力學研究所碩士學位論文高墩大跨混凝土連續(xù)剛構(gòu)橋抗震性能研究姓名：李保寬申請學位級別：碩士專業(yè)：橋梁與隧道工程指導教師：郭迅2011-05ABSTRACT III ABSTRACT The continuous rigid frame concrete bridges with high piers and long spans has many advantages, such as beautiful outline,

2、higher span capacity, easy to construct, low cost of construction and so on, therefore, they are widely used in mountain regions these years in the southwest and northwest regions of China which is characterized by high

3、mountains and deep valleys. Because of its short history, there is no earthquake damage lesson for this kind of bridge except Zipingpu Bridge which is damaged in Wenchuan earthquake in 2008. The high-pier and long-span c

4、ontinuous rigid frame concrete bridge is usually used as the backbone bridge of the trunk transport line, and its seismic damage would have a great influence on the transport of the whole area and the earthquake relief e

5、ffort, so it is of great engineering significance to research the seismic performance of the continuous rigid frame concrete bridge with high pier and long span and know its earthquake damage mechanism and ultimate earth

6、quake-resistant capability. The earthquake-resistant capability of the continuous rigid frame concrete bridges with high piers and long spans is researched by the integrated means of field investigation and analysis, fie

7、ld modal test on the real bridge, pseudo dynamic test on the bridge model, shaking table test on the bridge model, and numerical simulation, and the research findings are as follows: The earthquake damage of bridges is s

8、ummarized based on some factors such as material, constitution, and earthquake effect. The seismic damage mechanism of all types of bridges is elaborated, the seismic weakness of these bridges is discussed, and on the ba

9、sis of them, improved design advice is proposed. Taking Niulanjiang Bridge in Yunnan province, a continuous rigid frame concrete bridge with high piers and long spans, whose height is 140m, and main span is 170m as an ex

10、ample, a modal test is conducted on it. The horizontal, longitudinal, and vertical modal parameters are obtained which provide a strong basis for the subsequent model design and finite element analysis. Based on the moda