大跨度系杆拱桥减隔震支座参数分析

英文篇名：Parameter Analysis of Long-span Tied-arch Bridge Seismic Isolation Bearing
中文刊名：石家庄铁道大学学报(自然科学版)
英文刊名：Journal of Shijiazhuang Tiedao University(Natural Science)
作者：刘聪 ; 李建中
英文作者：Liu Cong ; Li Jianzhong(Department of Bridge Engineering ; Tongji University ; Shanghai 200092 ; China)
中文关键词：系杆拱桥 ; 减隔震支座 ; 影响参数
英文关键词：tied-arch bridge ; seismic isolation bearing ; influential factor
出版日期：2013-03-25
机构：同济大学桥梁工程系;
年：2013
期：01
出版单位：石家庄铁道大学学报(自然科学版)

摘要

结合一座大跨系杆拱桥实例,分析了不同减隔震支座参数对系杆拱桥减震性能的影响。通过对比发现,支座的球心距越大,减震效果越好。支座的摩擦系数越大,减震效果表现为先减小后变大的趋势,摩擦系数取0.02～0.03时,支座位移和墩台剪力达到最好的减震效果。但是支座参数的不同对承台底剪力总体的影响很小。
This paper takes a large span tied-arch bridge as an example,analyzes the damping performance of the tied-arch bridge with different minus isolation bearing.Through the contrast we find that the bigger of the distance of the two sphericalsurface's center,the better of the damping effect.While the friction coefficient of the sliding spherical surface gets bigger,the damping effect displays the trend to get first smaller and then bigger.With the friction coefficient at 0.02~0.03,there is an optimal effect on the bearing displacement and the sheer force of the bottom section of the pier and the pile caps.But the overall effect is very small for the sheer force of the pile caps.

引文

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