【摘要】 连梁装置是在超出预期强度的大地震发生时,防止落梁发生的最终安全装置。结合我国公路桥梁设计和地震区划分布的特点,提出适合我国抗震设计思想的连梁装置设计方法。首先根据连梁装置的设计目的和我国新的公路桥梁抗震设计规范思想,引入桥梁重要性分类、地震动参数和桥梁地震荷载重要性系数等。根据地震荷载的冲击特性,考虑矩形脉冲的反应谱特性,最大动力放大系数取为2.0,提出了连梁装置的设计方法和设计荷载系数。最后对连梁装置的构造和设计过程进行了介绍。该设计思想和方法适合我国地震分布差异较大的特点,与我国现行公路桥梁抗震设计规范的思想一致。更多还原

【Abstract】 Unseating prevention device(UPD) is the final safety device of the collapse prevention system for highway bridges in devastating earthquakes.The suitable design method of UPD adapting to the earthquake-resistant design thoughts of China was proposed according to the design characteristic of highway bridges and earthquake regionalization.First,based on the design aims of UPD and the thoughts of the new specifications of earthquake resistant design for highway bridges of China,importance classification of bridges,seismic parameters and seismic load importance coefficients of bridges were introduced.According to the impact characteristic of seismic load and the response spectra of rectangular impulse,the design method and the load coefficients of the devices were put forward,in which the maximum response ratio has the value of 2.0.Finally the structures and design process of the devices were introduced.The design idea and method of UPD are suitable to the seismic distribution characteristics of China and identical to the thoughts of the current specifications of earthquake resistant design for highway bridges of China.更多还原