Nonlinear Rail-Structure Interaction Analysis of an Elevated Skewed Steel Guideway
Nonlinear Rail-Structure Interaction Analysis of an Elevated Skewed Steel Guideway
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DOI：
10.1061/(asce)be.1943-5592.0000163
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发表时间：
2011-05-01
影响因子：
3.6
通讯作者：
Olabimtan, Afisu
中科院分区：
文献类型：
--
作者：
Okelo, Roman;Olabimtan, Afisu
使用连续焊接钢轨（CWR）并将轨道直接固定在混凝土桥面上是大多数现代轻轨架空结构的典型做法。 CWR 和高架结构之间的相互作用是通过直接固定的轨道紧固件发生的，具有非线性的力-位移关系。对这种相互作用有重大影响的因素包括：下部结构单元的轴承布置、终止于架空结构的轨道工程、桥面结构类型以及轨道紧固件类型。为了更好地理解相互作用机制，使用商用软件 GT STRUDL 对直线、倾斜、高架钢导轨进行了非线性三维 (3D) 有限元分析。本研究考虑的载荷工况包括温度变化、钢轨断裂引起的温度变化以及列车制动。结果以沿桥梁长度的钢轨轴向应力以及两个桥台和所有桥墩位置处的法向承载力的形式呈现。研究表明，非线性 3D 建模可以全面了解轨道与结构相互作用 (RSI) 力。 DOI：10.1061/(ASCE)BE.1943-5592.0000163。 (C) 2011 年美国土木工程师学会。
The use of continuous welded rail (CWR) with direct fixation of track on concrete deck is typical of most modern light-rail aerial structures. The interaction between the CWR and the elevated structure takes place through direct-fixation rail fasteners, which have a nonlinear force-displacement relationship. Factors that have significant influence on this interaction include the following: the bearing arrangement at the substructure units, trackwork terminating on the aerial structure, type of deck construction, and type of rail fasteners. To better understand the interaction mechanism, a nonlinear three-dimensional (3D) finite-element analysis of a straight, skewed, elevated steel guideway was carried out using the commercially available software GT STRUDL. The load cases considered in this study are temperature change, temperature change with rail breaking, and train braking. Results are presented in the form of rail axial stresses along the length of the bridge and normal bearing forces at both abutments and at all pier locations. The study shows that nonlinear 3D modeling can give a comprehensive insight into the rail-structure interaction (RSI) forces. DOI:10.1061/(ASCE)BE.1943-5592.0000163. (C) 2011 American Society of Civil Engineers.