Finite element modelling of interlocking stabilized laterite soil block walls
Finite element modelling of interlocking stabilized laterite soil block walls
复制标题
联锁稳定红土土砌块墙的有限元建模
DOI：
10.1007/s42452-021-04211-5
复制
发表时间：
2021
影响因子：
2.6
通讯作者：
J. Kinuthia
中科院分区：
文献类型：
--
作者：
Sanewu Isaac Fundi;J. Kaluli;J. Kinuthia
本研究试图使用联锁稳定土块（ISSB）砌体的应力-应变关系来模拟其行为，并开发经验公式来帮助预测其抗压强度。采用Abaqus软件，采用Rankine破坏准则进行有限元分析，模拟了墙体的变形特性，并通过试验验证了分析结果。通过对用火山灰水泥、水化石灰和稻壳灰稳定的红土块体进行室内试验，确定了有限元模型中定义的ISSB的抗压强度、弹性模量和密度。反过来，通过统计多元回归分析，建立了ISSB砌体抗压强度的预测经验公式。除了砌体的力学性能外，有限元模拟结果还表明，ISSB砌体的变形性能受目标材料上使用的稳定剂类型的影响。这决定了砌体上的应力分布和垂直位移。对角线走失效模式是经验更脆弱的砌筑而锥观察失效模式在脆弱的砌体组合。
This study sought to use the stress–strain relationship of interlocking stabilized soil block (ISSB) masonry to model its behaviour and develop empirical formulae to aid in predicting its compressive strength. A finite element (FE) analysis adopting the Rankine failure criterion was performed using Abaqus software to simulate the deformability behaviour of the wall which was validated through experimental tests. The compressive strength, modulus of elasticity and density of ISSB defined in the FE model were determined by performing laboratory tests on laterite soil blocks stabilized with pozzolanic cement, hydrated lime and rice husk ash. Conversely, the predictive empirical formulae for the compressive strength of the ISSB masonry was developed by performing statistical multiple regression analysis. In addition to the mechanical properties of masonry, the FE simulation results indicated that the deformability behaviour of ISSB masonry is influenced by the type of stabilizer used on the target material. This dictated the stress distribution and vertical displacement on the masonry. A diagonally stepped failure mode was experienced in more brittle masonry while cone failure mode was observed in less brittle masonry assemblage.