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首页> 外文期刊>Journal of Earthquake Engineering >SIMULATION OF THE CYCLIC BEHAVIOUR OF R/C RECTANGULAR HOLLOW SECTION BRIDGE PIERS VIA A DETAILED NUMERICAL MODEL
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SIMULATION OF THE CYCLIC BEHAVIOUR OF R/C RECTANGULAR HOLLOW SECTION BRIDGE PIERS VIA A DETAILED NUMERICAL MODEL

机译：通过详细的数值模型模拟R / C矩形空心截面桥墩的循环行为

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摘要

In the search for robust constitutive models suitable for reproducing the performance of bridge piers during a seismic event, this paper details the simulation of the cyclic responses of four rectangular hollow section R/C bridge piers. These four R/C bridge piers were built at scale 1/2.5 and tested experimentally. Both tall and short piers are considered, covering situations where bending or shear are of relevance. Furthermore, the four piers were reinforced according to rather different design strategies: (ⅰ) the first is a 30-year-old bridge designed without allowance to the seismic action, and (ⅱ) the second is a bridge fulfilling the EC8 provisions. The detailed constitutive model that provides the numerical predictions includes two submodels: one with two scalar damage variables, reproducing the tensile and compressive degradations of concrete, and the other is based on the Giuffre-Menegotto-Pinto formulation, simulating the cyclic behaviour of the reinforcement. The Damage Mechanics submodel is implemented at the Gauss points of the finite elements that discretize the concrete, whereas the steel submodel is implemented on the 2-noded truss elements adopted for the rebars. A comparison between the numerical and the experimental results is discussed in detail in this paper.
机译：在寻找适合再现地震事件中桥墩性能的鲁棒本构模型时，本文详细介绍了四个矩形空心截面R / C桥墩的循环响应仿真。这四个R / C桥墩的比例为1 / 2.5，并进行了实验测试。高墩和短墩都被考虑在内，涵盖了弯曲或剪切相关的情况。此外，根据不同的设计策略对四个桥墩进行了加固：（ⅰ）第一个是30岁的桥梁，其设计不受地震影响；（ⅱ）第二个是满足EC8规定的桥梁。提供数值预测的详细本构模型包括两个子模型：一个具有两个标量损伤变量，再现混凝土的拉伸和压缩降解，另一个基于Giuffre-Menegotto-Pinto公式，模拟钢筋的循环行为。 。损伤力学子模型在离散混凝土的有限元的高斯点实现，而钢子模型在钢筋采用的2节点桁架单元上实现。本文详细讨论了数值与实验结果之间的比较。

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