In this paper, a two-step automated procedure based on adaptive limit and pushover analyses is developed for the seismic assessment of masonry structures. Inspired by an akin procedure previously developed by the authors for the out-of-plane behaviour, the procedure herein presented is extended to in-plane and combined in- and out-of-plane loading conditions, accounting also for the effect of masonry crushing failure. In the first step, an upper-bound adaptive limit analysis tool is used to predict the collapse mechanism (and the corresponding multiplier) of the structure given a certain loading condition. A novel ad-hoc routine is then developed and utilized for the automatic import of the collapse mechanism geometry of any complexity into a solid model ready to be used in a finite element framework. In the second step, cohesive-frictional contact-based interfaces are automatically inserted in the cracks of the collapse mechanism formerly obtained, and a pushover analysis is conducted to investigate the load–displacement response of the structure. A series of parametric analyses are conducted to highlight the effect of different mechanical assumptions. Finally, the effectiveness of the procedure proposed is shown on a full-scale masonry building case study.

本文提出了一种基于自适应极限和推覆分析的两步自动化程序，用于砌体结构的地震评估。受作者先前针对平面外行为开发的类似程序的启发，本文介绍的程序扩展到平面内以及组合的平面内和平面外加载条件，还考虑了砌体压碎的影响失败。第一步，使用上限自适应极限分析工具来预测在给定一定载荷条件下结构的倒塌机理（和相应的乘数）。然后，开发了一种新颖的自组织例程，并将其用于将任何复杂性的折叠机构几何结构自动导入到实体模型中，以准备在有限元框架中使用。第二步 将基于内聚摩擦接触的界面自动插入到先前获得的倒塌机制的裂缝中，并进行了推覆分析以研究结构的荷载-位移响应。进行了一系列参数分析，以突出不同机械假设的影响。最后，在一个完整的砌体建筑案例研究中显示了所提出程序的有效性。