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Conceptual Seismic Design of Railway Long-Span Arch Bridges

机译：铁路长跨度拱桥的概念地震设计

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Conceptual seismic design is a qualitative design for seismic performance of the structure, and the corresponding design is the quantitative design based on seismic response analysis. The qualitative conceptual design is more reliable than the quantitative numerical design to long - span arch bridges, because there are many uncertainties in the quantitative seismic response analysis. The typical earthquake damage and the cause of the damage for long-span arch bridges are presented at home and abroad. The general requirements of conceptual seismic design for long-span arch bridge are discussed from the aspects of engineering site selection, reasonable bridge structure system and layout scheme and foundation form. The design principles avoiding brittle failure for long span arch bridges are given from the use of high strength materials, improving the overall ductility, setting up redundancy elements and multi seismic defense lines. Main components and secondary members of the structure are divided, seismic capacity of main component and secondary member are different design. Seismic conceptual design method is proposed. The general requirements, design principles and design methods are also applied to the long span cable-stayed bridge and suspension bridge.
机译：概念地震设计是对结构的地震性能的定性设计，相应的设计是基于地震反应分析的定量设计。定性概念设计比长期拱桥的定量数值设计更可靠，因为定量地震反应分析中存在许多不确定性。国内外典型地震损害和长期拱桥损坏的原因。从工程站点选择，合理的桥梁结构系统和布局方案和基础形式的方面讨论了长期拱桥概念地震设计的一般要求。避免长跨度拱桥的脆性失效的设计原理是通过使用高强度材料，提高整体延展性，建立冗余元件和多地震防御线。结构的主要成分和次要成员分开，主要成分和二级成员的地震能力是不同的设计。建议地震概念设计方法。一般要求，设计原则和设计方法也适用于长跨度斜拉桥和悬架桥。

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