公路交通科技
公路交通科技
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JOURNAL OF HIGHWAY AND TRANSPORTATION RESEARCH AND DEVELOPMENT
2010年
1期
78-83
,共6页
桥梁工程%地震破坏分析%时程分析%断裂带%人工地震波%汶川地震
橋樑工程%地震破壞分析%時程分析%斷裂帶%人工地震波%汶川地震
교량공정%지진파배분석%시정분석%단렬대%인공지진파%문천지진
bridge engineering%seismic failure analysis%time-history analysis%fault zone%artificial earthquake wave%Wenchuan earthquake
以汶川地震跨小鱼洞断裂带的小鱼洞大桥地震破坏为研究背景,通过对其震后现场的实地勘察分析,建立了小鱼洞大桥多点地震动激励的动力分析数值模型.考虑到断裂带两侧地震强度的区别,采用三角级数法模拟人工地震波时选用不同的地震峰值加速度,然后对其进行地震破坏数值分析,重点讨论了桥梁地震破坏的薄弱部位及其破坏原因.数值模拟结果基本体现了小鱼洞大桥的实际破坏状况,证明了数值分析模型的有效性.
以汶川地震跨小魚洞斷裂帶的小魚洞大橋地震破壞為研究揹景,通過對其震後現場的實地勘察分析,建立瞭小魚洞大橋多點地震動激勵的動力分析數值模型.攷慮到斷裂帶兩側地震彊度的區彆,採用三角級數法模擬人工地震波時選用不同的地震峰值加速度,然後對其進行地震破壞數值分析,重點討論瞭橋樑地震破壞的薄弱部位及其破壞原因.數值模擬結果基本體現瞭小魚洞大橋的實際破壞狀況,證明瞭數值分析模型的有效性.
이문천지진과소어동단렬대적소어동대교지진파배위연구배경,통과대기진후현장적실지감찰분석,건립료소어동대교다점지진동격려적동력분석수치모형.고필도단렬대량측지진강도적구별,채용삼각급수법모의인공지진파시선용불동적지진봉치가속도,연후대기진행지진파배수치분석,중점토론료교량지진파배적박약부위급기파배원인.수치모의결과기본체현료소어동대교적실제파배상황,증명료수치분석모형적유효성.
Based on seismic failure of Xiaoyudong bridge across Xiaoyudong fault zone in Wenchuan earthquake,multi-support excitation numerical model for dynamic analysis of the bridge was established after investigating the post-earthquake field.Considering the difference of earthquake intensities in both sides of the fault zone,artificial earthquake waves were simulated by trigonometric series method with different seismic peak accelerations. Then the seismic failure numerical analysis was carried out,the weak areas of seismic failure and their reasons were discussed particularly. Numerical simulation result embodies actual failure conditions of Xiaoyudong bridge on the whole and demonstrates the validity of the analysis model.