Numerical Collapse Analysis of Tsuyagawa Bridge Damaged by Tohoku Tsunami
Numerical Collapse Analysis of Tsuyagawa Bridge Damaged by Tohoku Tsunami
复制标题
东北海啸损坏的津谷川大桥倒塌数值分析
DOI：
10.1061/(asce)cf.1943-5509.0000925
复制
发表时间：
2015
影响因子：
2.5
通讯作者：
A. Hosoda
中科院分区：
文献类型：
--
作者：
H. Salem;S. Mohssen;Yuto Nishikiori;A. Hosoda
摘要2011年3月，东北海啸席卷日本东海岸，造成15,000多人死亡，2,500多人失踪。海啸导致40多万座建筑物倒塌，250多座沿海桥梁被冲走。在这项研究中，Tsuyagawa大桥损坏的东北海啸的倒塌数值研究使用应用单元法（AEM），因为它的优点，模拟结构连续倒塌。AEM是一种离散裂纹方法，允许在完全非线性动态计算方案中元件分离、下落和彼此碰撞。分析表明，有效地模拟桥梁倒塌，表明桥梁倒塌的水速度为6.6米/秒的弯曲破坏的桥墩开始。桥梁加固研究表明，如果桥墩采用100 mm厚的钢筋混凝土导管架和20 mm厚的钢筋混凝土加固，与东北海啸相比，倒塌水流速度可增加22%和29%。
AbstractIn March 2011, the Tohoku tsunami swept over the east coast of Japan killing more than 15,000 people and missing more than 2,500 people. The tsunami resulted in collapsing of more than 400,000 buildings and washing away of more than 250 coastal bridges. In this study, the collapse of Tsuyagawa bridge damaged by the Tohoku tsunami is numerically investigated using the applied element method (AEM) because of its advantages for simulating structural progressive collapse. The AEM is a discrete crack approach that allows the elements separation, fall, and collision with each other in a fully nonlinear dynamic scheme of computations. The analysis was demonstrated to efficiently simulate the bridge collapse, showing that the bridge collapsed at a water speed of 6.6 m/s initiated by flexural failure of its piers. The study of bridge strengthening showed that the collapse water speed could be increased by 22 and 29% compared to Tohoku tsunami if piers are strengthened by a 100-mm RC jacket and 20-mm thick...
DOI：
10.5860/choice.33-0948
发表时间：
1995
期刊：
--
影响因子：
--
作者：
A. Chopra
通讯作者：
A. Chopra