组合节点变形机制和破坏形态的定量评价

发布时间：2019-01-08 10:50

【摘要】：节点的变形机制和破坏形态分析是其抗震性能评估的重要内容,但目前缺乏有效的定量评价方法。该文基于多尺度数值模型,对组合节点变形机制和破坏形态的定量评价方法开展研究。提出采用"变形分量比例图"分析组合节点的变形机制,该图可根据多尺度模型的位移结果直接计算得到。"变形分量比例图"反映了梁弯曲、柱弯曲、和节点域剪切三种主要变形分量随层间位移角以及层间位移方向角的变化规律,可直观地揭示组合节点在任意层间位移方向上的破坏形态。层间位移方向角对空间组合节点的变形机制和破坏形态影响显著,必须利用"变形分量比例图"全面验算组合节点在任意可能层间位移方向上的破坏形态,并进一步优化设计确保任意可能地震入射方向上的预期破坏机制。
[Abstract]:The analysis of deformation mechanism and failure form of joints is an important part of seismic performance evaluation, but there is a lack of effective quantitative evaluation method. Based on the multi-scale numerical model, this paper studies the quantitative evaluation method of deformation mechanism and failure morphology of combined nodes. The deformation mechanism of the combined node is analyzed by using the "deformation component proportional diagram", which can be directly calculated according to the displacement results of the multi-scale model. The proportion diagram of deformation component "reflects the variation law of three main deformation components: beam bending, column bending, and joint shear with the interstory displacement angle and the interstory displacement direction angle." The failure pattern of composite joints in any direction of interstory displacement can be revealed intuitively. The direction angle of interstory displacement has a significant influence on the deformation mechanism and failure form of spatial composite node. The failure pattern of composite node in any possible interstory displacement direction must be checked by "deformation component proportion diagram". And further optimize the design to ensure the expected failure mechanism in the direction of arbitrary possible earthquake incidence.
【作者单位】：清华大学北京市钢与混凝土组合结构工程技术研究中心;大连理工大学工业装备结构分析国家重点实验室;
【基金】：清华大学自主科研计划(20161080107) 国家自然科学基金面上项目(51378291)
【分类号】：TU398.9

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