Stability analysis of clay brick masonry columns: numerical aspects and modelling strategies
Stability analysis of clay brick masonry columns: numerical aspects and modelling strategies
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粘土砖砌体柱的稳定性分析：数值方面和建模策略
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
G. Minafó
中科院分区：
文献类型：
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作者：
M. Fossetti;C. Giacchino;G. Minafó
砌体墩柱的稳定性分析是结构工程领域中最常见的课题之一。这种关注可能是由于解决问题的挑战，包括不同的影响，这在评估偏心加载柱的响应中起着重要的作用。在这方面，准确的稳定性分析的砌体墩和柱必须考虑到非线性应力应变规律的砌体在压缩，有限的抗拉强度，诱导细长由于裂缝的形成和几何非线性。在过去，人们开发了不同的理论模型和数值方法来分析这种结构构件的屈曲和强度的组合效应。本文推导了粘土砖砌体构件的数值计算方法，并对该方法进行了详细说明。在回顾了最广泛使用的分析模型的砌体的压缩性能，压缩和开裂的非线性本构关系的影响考虑到适当的弯矩曲率曲线。后者是在一个简单的数值程序中实现的，并且可以计算力-位移曲线和安全域，这说明了强度和稳定性。最后，该方法得到验证的结果来自非线性有限元分析，使人们有可能考虑的方法和相关的计算工作的适用性。
Stability analysis of masonry piers and columns is one of the most frequently treated subjects in the field of structural engineering. This attention is probably due to the challenge to solving the problem including different effects, which play an important role in evaluating the response of eccentrically-loaded columns. In this connection, accurate stability analysis of masonry piers and columns has to take into account the non-linear stress–strain law of masonry in compression, the limited tensile strength, the induced slenderness due to crack formation and geometrical non-linearity. Different theoretical models and numerical approaches were developed in the past to analyze the combined effect of buckling and strength in such structural members. In this paper a numerical method is derived and particularized for the case of clay brick masonry members. After a review of the most widely used analytical models for the compressive behaviour of masonry, the effects of a non-linear constitutive law in compression and cracking were taken into account with suitable moment–curvature curves. The latter were implemented in a simple numerical procedure, and made it possible to calculate the force–displacement curves and safety domains, which account for both strength and stability. The method was finally verified with results derived from non-linear finite element analyses, making it possible to make considerations about the suitability of the method and the related computational effort.