Thamboo Julian, Bandara Janaka, Perera Sithara, Navaratnam Satheeskumar, Poologanathan Keerthan, Corradi Marco
Department of Civil Engineering, South Eastern University of Sri Lanka, Oluvil 32360, Sri Lanka.
School of Engineering, Royal Melbourne Institute of Technology, Melbourne 3001, Australia.
Materials (Basel). 2020 Oct 11;13(20):4505. doi: 10.3390/ma13204505.
Structural evaluation of masonry against dynamic seismic actions invariably requires appropriate cyclic compression constitutive models. However, not many research studies have been dedicated to date to investigate the cyclic compression behaviour of masonry. Therefore, series of experimental investigation followed by analytical model verification were employed in this research to better understand the cyclic compression characteristics of masonry. Twelve masonry wallettes were experimentally tested under cyclic compression loading with different unit-to-mortar assemblies, which are commonly found in masonry structures. The experimental results indicated that the cyclic compression behaviour is greatly influenced by the masonry compressive strength and deformation properties. Thereafter, the ability of five literature analytical models to predict the masonry structural response under cyclic compression loading was investigated. The advantages and limitations of these models are presented and discussed, and the most appropriate analytical model to define the cyclic compression characteristics of masonry has been evaluated and reported. The suggested analytical model is shown to predict the cyclic compression characteristics of different masonry assemblies such as the envelop response, the stiffness degradation, the plastic strain history of the unloading and reloading stages.
针对动态地震作用对砌体进行结构评估始终需要合适的循环压缩本构模型。然而，迄今为止，致力于研究砌体循环压缩行为的研究并不多。因此，本研究采用了一系列实验研究并随后进行分析模型验证，以更好地理解砌体的循环压缩特性。十二个砌体墙片在循环压缩荷载作用下进行了实验测试，采用了砌体结构中常见的不同单元与砂浆组合。实验结果表明，循环压缩行为受砌体抗压强度和变形特性的显著影响。此后，研究了五个文献分析模型预测砌体在循环压缩荷载作用下结构响应的能力。介绍并讨论了这些模型的优缺点，并评估和报告了定义砌体循环压缩特性的最合适分析模型。所建议的分析模型能够预测不同砌体组合的循环压缩特性，如包络响应、刚度退化、卸载和再加载阶段的塑性应变历史。
