地震作用下高墩剛構(gòu)橋倒塌分析
發(fā)布時間：2018-10-31 14:26
【摘要】：為了研究高墩剛構(gòu)橋在地震作用下的倒塌問題,根據(jù)結(jié)構(gòu)在地震作用下發(fā)生損傷累積而喪失承受豎向荷載的能力、最終發(fā)生倒塌破壞的機理,提出了基于墩頂豎向位移的倒塌判別準則;采用基于單地震動記錄IDA的分析方法,得到了結(jié)構(gòu)倒塌破壞的極限狀態(tài)點和塑性變形特征。以一座最大墩高為178m的(100+3×200+106)m高墩剛構(gòu)橋為背景,進行結(jié)構(gòu)倒塌分析,并對其結(jié)構(gòu)塑性變形特征進行研究。結(jié)果表明:高墩剛構(gòu)橋墩頂豎向位移可作為倒塌破壞的特征響應;墩底、墩頂和系梁附近是結(jié)構(gòu)塑性發(fā)展區(qū)。
[Abstract]:In order to study the collapse of rigid frame bridge with high piers under earthquake, according to the damage accumulation of the structure under earthquake and the loss of the ability to bear vertical load, the mechanism of collapse and failure is finally taken place. The criterion of collapse based on the vertical displacement of pier top is proposed. The limit state points and plastic deformation characteristics of collapse failure of structures are obtained by using IDA analysis method based on single ground motion records. Taking a (1003 脳 200106) m high pier rigid frame bridge with the maximum pier height of 178m as the background, the structural collapse analysis is carried out and the structural plastic deformation characteristics are studied. The results show that the vertical displacement of pier top of high pier rigid frame bridge can be regarded as the characteristic response of collapse and failure, and the plastic development zone is near the pier bottom, pier top and tie beam.
【作者單位】： 武漢理工大學交通學院;
【基金】：內(nèi)蒙古自治區(qū)交通科技項目(NJ-2012-18)
【分類號】：U442.55
[Abstract]:In order to study the collapse of rigid frame bridge with high piers under earthquake, according to the damage accumulation of the structure under earthquake and the loss of the ability to bear vertical load, the mechanism of collapse and failure is finally taken place. The criterion of collapse based on the vertical displacement of pier top is proposed. The limit state points and plastic deformation characteristics of collapse failure of structures are obtained by using IDA analysis method based on single ground motion records. Taking a (1003 脳 200106) m high pier rigid frame bridge with the maximum pier height of 178m as the background, the structural collapse analysis is carried out and the structural plastic deformation characteristics are studied. The results show that the vertical displacement of pier top of high pier rigid frame bridge can be regarded as the characteristic response of collapse and failure, and the plastic development zone is near the pier bottom, pier top and tie beam.
【作者單位】： 武漢理工大學交通學院;
【基金】：內(nèi)蒙古自治區(qū)交通科技項目(NJ-2012-18)
【分類號】：U442.55
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