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单孔和连孔拱桥在横桥向的地震内力在一般情况下可满足抗震要求,因此可不计算。在本章中我们着重给出顺桥向的抗震计算。第一节单孔拱桥顺桥向的抗震计算在《公路工程抗震设计规范》中给出的单孔拱桥抗震计算方法只考虑了拱的弯曲振动的地震反应。理论和实际震害表明,在拱平面内,拱将产生两种性质不同的自振,一
Single-hole and even hole arch bridge in the transverse seismic force within the general conditions to meet seismic requirements, it can not be calculated. In this chapter, we focus on the earthquake resistance calculation along the bridge. Section 1 Aseismic Calculation of a Single-hole Arch Bridge along a Bridge The seismic calculation method of a single-hole arch bridge given in the Code for Aseismic Design of Highway Engineering considers only the seismic response of bending vibration of the arch. Theoretical and practical seismic damage shows that in the arch plane, the arch will produce two kinds of natural vibration of different nature, one