Orastie-Sibiu高速公路高架桥的动力试验

IF 0.1 Q4 ENGINEERING, CIVIL
Ghindea Cristian Lucian, Răcănel Ionuţ Radu, Cruciat Radu Iuliu
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引用次数: 1

摘要

摘要桥梁动态试验的目标是建立其对车轮间脉冲力和路面不平坦度的响应。通常,在测试过程中,要测量实时加速度或变形,并通过连续的处理方法得出其他数据,如速度、位移、动态冲击系数以及阻尼比。为了验证测试后的桥梁响应,将测量数据与标准中的允许限值以及使用分析或数值模型获得的结果进行比较。在罗马尼亚,现行标准建议对桥梁进行动态测试,仅适用于在复杂或特殊解决方案中架设的重要桥梁,也适用于大跨度桥梁。本文的目的是概述对A1高速公路Orăştie Sibiu区高架桥进行动态测试期间的现场测量结果。桥梁上部结构为组合结构,连续梁,跨度为12跨:40+10×60+40m,下部结构由11个墩组成,墩高为8.50-24m不等。本文还建立了一个有限元模型,用于脉冲型荷载的时程分析。最后,对现场和数值模型的结果进行了比较和讨论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic Test of a Viaduct on the Orastie–Sibiu Highway
Abstract Dynamic testing of bridges has as target to establish their response on pulse forces between the wheels and unevenness of road surface. Generally, during the tests, real time accelerations or deformations are to be measured and which through successive processing methods lead to other data as velocities, displacements, dynamic impact factor, but also the damping ratio. In order to validate the bridge response following testing, the measured data are compared both with allowable limits existing in standards and with the results obtained using analytical or numerical models. In Romania, the dynamic testing of bridges is recommended by the current standards, only for important bridges, erected in complex or special solutions and also for large span bridges. The aim of this paper is to outline the results obtained from the on-site measurements during dynamic testing of a viaduct placed on the motorway A1, sector Orăştie-Sibiu. The bridge superstructure is a composite one, continuous girder on 12 spans: 40+10×60+40 m, the substructure consisting in 11 piers with lamellar elevations and variable height in the range 8.50-24m. In the paper a finite element model is also presented which was used for time-history analyses using an impulse type load. Finally, the results obtained on the site and using the numerical model are compared and discussed.
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