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New Langensand Bridge in Lucerne, Switzerland: Evolutionary System of a Composite Structure

机译:瑞士卢塞恩州的新朗根桑大桥:复合结构的演化系统

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The urban development of the city of Lucerne required the replacement of the existing Langensand road bridge by one designed according to modern standards of urban mobility. The bridge's shape is the result of a synthesis between function, construction method, structure, and the urban context (extremely dense environment and several complex constraints). The bridge crosses 79.7m with one single span girder over 11 railway lines. Its composite structure has an extreme slenderness of about L/37. The paper describes the advantages and problems of a steel-concrete composite construction especially in regard to its structural system, and the evolution during the construction phases, and to its slender and flexible structure. The paper will compare and highlight the theoretical approach (hypothesis and numerical models for static and dynamic actions) with the results of in situ tests for the two principal states of the structure: firstly, the half bridge and secondly, the final connected bridge.
机译:卢塞恩市的城市发展需要用一种根据现代城市交通标准设计的桥梁来取代现有的朗根桑德路桥。桥梁的形状是功能,构造方法,结构和城市环境(极端密集的环境和一些复杂约束)之间综合的结果。该桥横穿79.7m,在11条铁路线上有一个单跨大梁。它的复合结构具有约L / 37的极细度。本文描述了钢混凝土复合结构的优点和问题,特别是在结构体系,施工阶段的演变以及细长而柔韧的结构方面。本文将比较并强调理论方法(静态和动态作用的假设和数值模型)与结构的两个主要状态的现场测试结果:首先是半桥,其次是最终的连接桥。

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