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一、柔性墩的特点铁路桥梁柔性墩每联仅设一个活动支座,其余均为固定支座。以固定支座为传力装置,体系转换使简支梁转换为梁、墩、台共同作用的多孔连续框架,把绝大部分梁上的制动力传递给刚性台(墩)承受,从根本上改变了桥墩的受力条件,所受纵向水平力很小,节约40～70％圬工,经济效益十分显著,具有强大的生命力。柔性墩是轻型桥墩进一步发展的新成果,符合“桥梁结构要经济合理,向高强、轻型、整体、大跨度发展”的技术政策。铁路上大部分采用重力式实体桥墩,主要由允许偏心及墩顶位移值控制设计,靠较大的墩身自重和截面来满足偏心和位移的要
First, the characteristics of flexible pier Flexible bridge railway bridge only one set of movable support, the rest are fixed bearing. The fixed support is used as the force transmission device. The system conversion converts the simply supported beam into a continuous porous frame with beams, piers and abutments. The braking force on most of the beams is transmitted to the rigid table (piers) Changing the stress conditions of piers, the longitudinal horizontal force suffered by small, saving 40 ~ 70% 圬 workers, the economic efficiency is very significant, with strong vitality. The flexible pier is a new achievement for the further development of light piers, which is in line with the technical policy of “the bridge structure should be economically reasonable, high-strength, light-weight, overall and large-span development”. Most of the railway using gravity piers, mainly by the allowable eccentric and pier displacement control design, by a larger body weight and cross section to meet the eccentric and displacement to