【摘要】 广东金马大桥主桥为双索面混凝土独塔斜拉桥与T形刚构的协作体系,其独特结构体系的成功实施引起了工程界的巨大关注.文中采用4组人工生成的地震波,考虑多点激励、行波效应以及结构的几何非线性因素的影响,在竖向、纵向和横向地震波输入下,对金马大桥进行了地震响应研究,分析比较了多点线性一致激励、多点非线性一致激励以及多点行波效应输入情况下主梁、主塔、边墩等控制截面的内力和位移响应时程结果,并对其影响规律进行讨论.由于时域分析采用精细逐步积分格式,使计算结果更加精确.更多还原

【Abstract】 The main structure of Guangdong Jinma Bridge is a kind of special combined system of T-shape rigid frame and single-tower cable stayed bridge.The successful implementation of this special structure has drawn more attention.In this paper,by the use of four groups of artificial seismic waves,this dissertation accounts for the impact of non-linearity of the structure and the wave passage effect.It presents a detailed study of the seismic response of Jinma Bridge in terms of the vertical,longitudinal,and lateral seismic excitation.It also presents the comparative analysis including the multiple-support linear uniform,nonlinear uniform and wave passage effect excitation,and the response time histories of internal force and displacement of critical sections in the main beam,tower,and the side pier.The effect regulation is discussed in details.Some conclusions will be helpful to the preliminary design and construction of the similar bridge.更多还原