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首页> 外文期刊>Journal of Earthquake Engineering >Analytical Seismic Assessment of a Tall Long-Span Curved Reinforced-Concrete Bridge. Part Ⅱ: Structural Response
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Analytical Seismic Assessment of a Tall Long-Span Curved Reinforced-Concrete Bridge. Part Ⅱ: Structural Response

机译：高大跨度弯曲钢筋混凝土桥梁的分析地震评估。第二部分：结构响应

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摘要

The seismic assessment of special bridges, even under the hypothesis of full knowledge of site conditions, structural characteristics, and seismic activity at their location, is not an easy and straightforward task due to the complexities and uncertainties related to the finite-element modeling approaches, structural loading scenarios, and seismic analysis methodologies. In this article, a series of nonlinear static and dynamic finite-element analyses on the Mogollon Rim Viaduct are performed with consideration of both uniform and conditionally simulated non-uniform seismic motions. The failure modes of the bridge using different numerical modeling approaches are discussed, and the degree of sensitivity of its response to the different seismic assessment strategies is evaluated. The effect of the multi-component, multi-support and multi-directional excitations of ground motions on the design and response are studied, and the pros and cons of the commonly used structural analysis methodologies of bridges are also addressed. The numerical results of the present study provide a deeper insight into the nonlinear behavior of curved reinforced-concrete bridges, and suggest practice-oriented approaches for their seismic assessment.
机译：即便在充分了解现场条件，结构特征和所在地地震活动的假设下，对特殊桥梁进行地震评估也不是一件容易和直接的任务，因为与有限元建模方法相关的复杂性和不确定性，结构荷载方案和地震分析方法。在本文中，对Mogollon轮辋高架桥进行了一系列非线性静态和动态有限元分析，同时考虑了均匀和有条件模拟的非均匀地震运动。讨论了采用不同数值建模方法的桥梁的破坏模式，并评估了其对不同地震评估策略的敏感性。研究了地震动的多分量，多支撑和多方向激励对设计和响应的影响，并探讨了桥梁常用结构分析方法的优缺点。本研究的数值结果为弯曲钢筋混凝土桥梁的非线性行为提供了更深入的见解，并提出了面向实践的地震评估方法。

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