石家庄铁道大学学报(自然科学版)
石傢莊鐵道大學學報(自然科學版)
석가장철도대학학보(자연과학판)
JOURAL OF SHIJIAZHUANG TIEDAO UNIVERSITY(NATURAL SCIENCE EDITION)
2014年
2期
1-5
,共5页
自锚式悬索桥%黏滞阻尼器%减震
自錨式懸索橋%黏滯阻尼器%減震
자묘식현색교%점체조니기%감진
self-anchored suspension bridge%viscous damper%dissipation
以某双塔自锚式悬索桥为例,通过在桥塔与主梁之间设置液体黏滞阻尼器,把地震作用下桥梁纵向的位移和内力控制在一个合理的范围内。通过改变阻尼参数C和α,对此桥纵向的地震位移和内力的变化情况进行了规律总结。比较发现,当阻尼系数C越大或阻尼指数α越小时,此桥纵向的地震位移和内力反应就越小。其中C取3500左右,α取0.3时,塔底地震弯矩降幅达40%左右,主梁地震位移降幅达50%左右。
以某雙塔自錨式懸索橋為例,通過在橋塔與主樑之間設置液體黏滯阻尼器,把地震作用下橋樑縱嚮的位移和內力控製在一箇閤理的範圍內。通過改變阻尼參數C和α,對此橋縱嚮的地震位移和內力的變化情況進行瞭規律總結。比較髮現,噹阻尼繫數C越大或阻尼指數α越小時,此橋縱嚮的地震位移和內力反應就越小。其中C取3500左右,α取0.3時,塔底地震彎矩降幅達40%左右,主樑地震位移降幅達50%左右。
이모쌍탑자묘식현색교위례,통과재교탑여주량지간설치액체점체조니기,파지진작용하교량종향적위이화내력공제재일개합리적범위내。통과개변조니삼수C화α,대차교종향적지진위이화내력적변화정황진행료규률총결。비교발현,당조니계수C월대혹조니지수α월소시,차교종향적지진위이화내력반응취월소。기중C취3500좌우,α취0.3시,탑저지진만구강폭체40%좌우,주량지진위이강폭체50%좌우。
This paper takes a self-anchored suspension bridge with two pylons for example .Fluid viscous dampers which are installed between pylon and beam are introduced to balance the displacements and forces un -der earthquake in a reasonable range .The variation trend of the seismic displacements and forces are summa-rized by changing dampers ’ parameters C andα.By contrast , it is found that with bigger damper coefficient or smaller damper exponent , smaller bridge seismic displacements and forces are observed .When takes around 3 500 and takes 0.3, the seismic moments of pylon ’ s bottom decrease about 40%and the seismic displacements of beam decrease about 50%.