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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >A nonlinear visco-elastoplastic model for structural pounding
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A nonlinear visco-elastoplastic model for structural pounding

机译:结构碰撞的非线性粘弹塑性模型

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摘要

State-of-the-art pounding formulations do not consider eventual damage-induced changes regarding the collision description during an excitation time history. In particular, in case of multiple collisions, the pounding models remain unaltered. Thus, in this paper, a new pounding formulation is presented, whereby the state-of-the-art nonlinear viscoelastic model is enhanced by a dry friction element. This extension enables the description of degradation of collision surfaces by introducing an additional offset penetration parameter to the standard gap function. The phenomenological model of the new pounding formulation and the new corresponding pounding condition is presented and demonstrated on an illustrative numerical example. It is shown that the new formulation is capable of describing permanent damage effects caused by pounding collisions while preserving the desired physical properties of the nonlinear viscoelastic model.
机译:最先进的冲击配方在激发时间历史过程中并未考虑到碰撞描述中最终由损伤引起的变化。特别是在发生多次碰撞的情况下,冲击模型保持不变。因此,在本文中,提出了一种新的冲击公式,从而通过干摩擦元件增强了最新的非线性粘弹性模型。通过将附加的偏移穿透参数引入标准间隙函数,此扩展可以描述碰撞表面的退化。提出了新的冲击配方和新的相应冲击条件的现象学模型,并在一个说明性的数值示例上进行了演示。结果表明,新的配方能够描述由撞击引起的永久性损伤效应,同时保留了非线性粘弹性模型的理想物理特性。

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