山西稷王山砖塔地震动力响应及损伤分析
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太原理工大学

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山西省自然科学基金


Seismic Response and Damage Analysis of the Pagoda on Shan Xi Jiwang Mountain
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Taiyuan University of Technology

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Shanxi Natural Science Foundation

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    摘要:

    本文采用数值分析方法对山西稷王山古塔在不同地震作用下的破坏形态及损伤进行了计算分析,为古塔的抗震加固提供依据,计算模型采用塑性损伤本构描述地震作用下砌体结构的损伤失效,给出了古塔在不同调幅地震波作用下的位移形态,获得了层间位移、加速度放大系数等地震响应数值,讨论了地震引起的损伤分布规律。结果表明,稷王山古塔整体刚度分布均匀,塔顶加速度放大系数最大,尽管古塔底部墙体厚于上部,但在地震作用下仍是在底层首先出现受拉损伤,并随地震强度提高而向上扩展;应力云图显示,地震作用下古塔底层最大主拉应力区呈斜向上扩展形态,易使塔体形成斜向裂缝;古塔薄弱层为底部三层及顶层。

    Abstract:

    In this paper, the failure mode and damage of pagoda on Shan Xi Jiwang Mountain under different earthquakes are calculated and analyzed by numerical analysis method, which provides the basis for seismic reinforcement for Jiwang pagoda. The plastic damage constitutive model is applied to describe the damage failure of masonry structure under earthquake. The displacement form of pagoda under multiple amplitude-modulated seismic waves is given. The seismic responses of interlayer displacement and dynamic amplification factor are obtained, and the seismic damage distribution is discussed. The results show that the overall stiffness of pagoda on Jiwang Mountain is uniform, and the acceleration amplification factor at the top pagoda is the largest. Although the bottom wall of the pagoda is thicker than that on top, the tensile damage is still initiated from the bottom under earthquake, and it expands upward with the increase of seismic intensity. The stress contours show that the maximum principal tensile stress area at the bottom of the pagoda under earthquake expands obliquely, which is easy to form oblique cracks. The weak layers of the pagoda is the bottom three layers and the top layer.

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历史
  • 收稿日期:2020-12-31
  • 最后修改日期:2021-04-26
  • 录用日期:2021-06-03
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