桥梁地震碰撞的三维撞击模型及非线性响应分析
发布时间：2018-08-07 19:14
【摘要】：为合理模拟地震时相邻桥梁间发生的碰撞响应,提出适用于桥梁多维碰撞响应分析的三维Kelvin接触-摩擦撞击模型,即将Kelvin-Voigt模型和库伦摩擦模型相结合,通过一个摩擦元件来模拟发生纵向碰撞后,接触点间的横向和竖向的相对摩擦作用,以真实地模拟结构接触位置的三维撞击行为。进而将该三维撞击模型引入所建立的结构精细化模拟分析平台FENAP中,与纤维梁柱单元模型良好结合,实现对桥梁的多维碰撞响应分析。通过对一钢筋混凝土连续梁桥在双向地震作用下的碰撞响应分析,结果表明:所提出的三维撞击模型能够模拟邻梁间的纵向和横向碰撞响应;纵向碰撞对刚度较大的桥梁影响较大,会增大墩底剪力和墩顶位移,加剧桥墩的塑性发展;横向碰撞对桥梁的碰撞响应影响较大,不可忽略。
[Abstract]:In order to reasonably simulate the collision response between adjacent bridges during earthquake, a three-dimensional Kelvin contact friction model suitable for bridge multidimensional impact response analysis is proposed, which combines Kelvin-Voigt model with Coulomb friction model. A friction element is used to simulate the transverse and vertical relative friction between the contact points after longitudinal collision, so as to simulate the three-dimensional impact behavior of the contact position of the structure. Furthermore, the 3D impact model is introduced into the structural fine simulation and analysis platform FENAP, which is well combined with the fiber Liang Zhu element model to realize the multi-dimensional impact response analysis of the bridge. Through the analysis of the impact response of a reinforced concrete continuous beam bridge under the action of bidirectional earthquake, the results show that the 3D impact model can simulate the longitudinal and transverse impact responses of adjacent beams. Longitudinal impact on the stiffness of the larger bridge will increase the pier bottom shear force and pier top displacement, increase the plastic development of the pier, transverse impact on the bridge impact response, can not be ignored.
【作者单位】： 天津大学滨海土木工程结构与安全教育部重点实验室;铁道第三勘察设计院集团有限公司;
【基金】：国家重点基础研究发展“973”计划项目(2011CB013603) 国家自然科学基金(91315301)
【分类号】：U442.55
，
本文编号：2171082
[Abstract]:In order to reasonably simulate the collision response between adjacent bridges during earthquake, a three-dimensional Kelvin contact friction model suitable for bridge multidimensional impact response analysis is proposed, which combines Kelvin-Voigt model with Coulomb friction model. A friction element is used to simulate the transverse and vertical relative friction between the contact points after longitudinal collision, so as to simulate the three-dimensional impact behavior of the contact position of the structure. Furthermore, the 3D impact model is introduced into the structural fine simulation and analysis platform FENAP, which is well combined with the fiber Liang Zhu element model to realize the multi-dimensional impact response analysis of the bridge. Through the analysis of the impact response of a reinforced concrete continuous beam bridge under the action of bidirectional earthquake, the results show that the 3D impact model can simulate the longitudinal and transverse impact responses of adjacent beams. Longitudinal impact on the stiffness of the larger bridge will increase the pier bottom shear force and pier top displacement, increase the plastic development of the pier, transverse impact on the bridge impact response, can not be ignored.
【作者单位】： 天津大学滨海土木工程结构与安全教育部重点实验室;铁道第三勘察设计院集团有限公司;
【基金】：国家重点基础研究发展“973”计划项目(2011CB013603) 国家自然科学基金(91315301)
【分类号】：U442.55
，
本文编号：2171082
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