多点地震激励下高墩小半径曲线桥的动力响应-桥梁与隧道工程专业论文.docxVIP

西安建筑科技大学硕士学位论文 西安建筑科技大学硕士学位论文 西安建筑科技大学硕士学位论文 西安建筑科技大学硕士学位论文 The Dynamic Response of the High Pier Small Radius Curved Long bridge under Multi-Point Seismic Excitation Major :Bridge and Tunnel Engineering Name :Zhu Kun Instructor : QingNing Li Professor Abstract The curved bridge is one of the important bridges in Chinese communications construction which has been widely used in more complex mountain area and urban overpass system. With the requirements for improving the ability to provide smooth and comfort ride in recent years, the construction of high pier small radius curved long bridge began to increase. Seismic waves received by the foundations of this bridge system may be very different, to a large extend, the consistent seismic model is difficult to meet with the actual affection that from seismic, it is urgent to do some research on the multi-point seismic excitation model and its response. In this paper, starting from the typical curved bridge engineering, inquiring into characteristics of how the high pier curved bridge seismic system compose and its suspension; establishing the Space-time coupling dynamical model; applying large finite element software for numerical simulation analysis, and making research on the dynamic response of small radius curved bridge under the consistent or multi-point seismic excitation respectively; also studying how the design parameters such as the radius of curvature, the pier height, as well as the length of bridge, the apparent wave velocity affect the seismic response. The main tasks are as follows: Discussing the common type of disaster and site of injury , failure modes that may occur when bridge suffers from the earthquake; analyzing the composition and the mechanical characteristics of curved bridge system and its difference with straight bridge. Studying of earthquake wave input mode; calculating the seismic response of high pier small radius curved bridge under the consistent incentive and multi-point excitation fro