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Pseudo-dynamic testing of bridges using non-linear substructuring

机译：使用非线性子结构的桥梁拟动力试验

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摘要

Pseudo-dynamic tests on a large-scale model of an existing six-pier bridge were performed at the ELSA laboratory using the substructuring technique. Two physical pier models were constructed and tested in the laboratory, while the deck, the abutments and the remaining four piers were numerically modeled on-line. These tests on a large-scale model of an existing bridge are the first to have been performed considering non-linear behavior for the modeled substructure. Asynchronous input motion, generated for the specific bridge site, was used for the abutments and the pier bases. Three earthquake tests with increasing intensities were carried out, aimed at the assessment of the seismic vulnerability of a typical European motorway bridge designed prior to the modern generation of seismic codes. The experimental results confirm the poor seismic behavior of the bridge, evidenced by irregular distribution of damage, limited deformation capacity, tension shift effects and undesirable failure locations.
机译：在ELSA实验室中，使用子结构技术对现有六墩桥的大型模型进行了拟动力试验。在实验室中构建并测试了两个物理墩模型，而甲板，桥台和其余四个墩则通过在线数值建模。考虑到建模子结构的非线性行为，首先对现有桥梁的大型模型进行了这些测试。为特定的桥梁位置生成的异步输入运动用于桥台和墩台基础。进行了三个强度不断提高的地震测试，旨在评估在现代地震规范之前设计的典型欧洲高速公路桥梁的地震脆弱性。实验结果证实了桥梁的不良地震行为，这由不规则的损伤分布，有限的变形能力，张力位移效应和不良的破坏位置证明。

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