| 梁桥在地震力冲击作用下简化的安全评估方法(英文) |
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| 引用本文： | 王修信,吴善幸.梁桥在地震力冲击作用下简化的安全评估方法(英文)[J].宁波大学学报(理工版),1996(4). |
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| 作者姓名： | 王修信 吴善幸 |
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| 作者单位： | 东南大学土木系，［美国］东北大学，马德里理工大学，宁波大学土木建筑工程系 |
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| 摘 要： | 提出了梁桥受桥板地震力冲击作用下一种评估抗震安全系数的简化能量法。将桥（包括内桥墩）与桥台（包括其基础）分别作为一个单自由度质量系统，基于冲击时两个质量系统的能量交换，可以得到岸墩桥台的基底剪力，然后与桥台的抗力（作用于桥台的侧向土压力基底摩擦力之和）相对比，可以得到桥台受桥板地震力冲击下的抗剪安全系数。该方法简单方便，并与有限元非线性动力分析结果相吻合。
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| 关 键 词： | 梁桥，地震，冲击，安全系数，能量法，基底剪力 |
SEISMIC SAFETY ASSESSMENT OF BRIDGE ABUTMENTS IMPACTED BY THE DECK DURING EARTHQUAKE |
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| Wang Xiuxin,F. J. Montans, D. Bernal ,E.Alarc, Wu Shanxing.SEISMIC SAFETY ASSESSMENT OF BRIDGE ABUTMENTS IMPACTED BY THE DECK DURING EARTHQUAKE[J].Journal of Ningbo University(Natural Science and Engineering Edition),1996(4). |
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| Authors: | Wang Xiuxin F J Montans D Bernal EAlarc Wu Shanxing |
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| Abstract: | A simple energy method for the safety evaluation of slidingof abutments impacted by bridge deck is proposed.The entire system isseparated into two systems of single degree of freedom, i.e.,abutment withembankment as system A and bridge deck with piers as system B. Based onthe energy interchange of two mass systems during impact, the shear force onthe abutment base has been obtained and then compared with the resistanceforce on the abutment , thus the safety factor of abutments against the impactof the bridge deck is evalusted. The method is simple, convenient yetaccurate for safety assessment of sliding of abutments impacted by the deck,and the results is checked by nonlinear dynamic finite element analysis. |
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| Keywords: | bridge abutment earthquake impacted safety factorenergy method |
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