With the aim of simultaneously reducing all seismic demands, this paper proposes a novel structural system comprising inclined demountable walls with rocking base composite columns (IDWC). The proposed IDWC system combines the concepts of using inclined demountable walls in each story and rocking-based concrete filled steel tube (CFST) columns as the wall boundary elements. In particular, through inclined walls, the number of walls in each story is reduced, while with the use of rocking CFST columns, damage to the boundary elements can be mitigated. In total, 18 two-dimensional numerical models are developed and static as well as dynamic analyses are conducted to evaluate the performance of conventional and demountable wall systems of 4-, 10- and 15-stories height. For each height, 4 IDWC models, with various wall arrangements, and a vertical demountable wall model are analyzed and compared with a conventional reinforcement concrete wall model. For the studied models, micro and macro numerical models are developed and verified through experimental data. After performing cyclic and time history nonlinear analyses, it is shown that IDWC models have lower initial stiffness and higher energy dissipation capacity than the conventional model. According to these results, inter-story drift, floor acceleration, and base shear in IDWC models are reduced by up to 30%, 41%, and 45%, respectively, compared to the conventional model. Also, it is demonstrated that with the use of rocking CFST columns, the wall boundaries remain undamaged, which ensures any residual drifts after severe earthquakes are insignificant. Meanwhile, as the incremental dynamic analysis results show, the collapse capacity of IDWC models is up to 53.5% higher than that of conventional models.

为了同时降低所有抗震需求，本文提出了一种新型结构体系，包括倾斜的可拆卸墙和摇摆底座复合柱 (IDWC)。拟议的 IDWC 系统结合了在每个楼层使用倾斜的可拆卸墙和基于摇摆的混凝土填充钢管的概念(CFST) 柱作为墙边界元素。特别是，通过倾斜墙，减少了每层的墙数量，同时使用摇摆钢管混凝土柱，可以减轻对边界构件的破坏。总共开发了 18 个二维数值模型，并进行了静态和动态分析，以评估 4、10 和 15 层高的传统和可拆卸墙系统的性能。对于每个高度，分析了 4 个具有各种墙布置的 IDWC 模型和一个垂直可拆卸墙模型，并与传统的钢筋混凝土墙模型进行了比较。对于所研究的模型，通过实验数据开发和验证了微观和宏观数值模型。在执行循环和时间历史非线性分析后，耗能能力高于常规型号。根据这些结果，与传统模型相比，IDWC 模型中的层间漂移、地板加速度和基础剪力分别降低了 30%、41% 和 45%。此外，事实证明，使用摇摆的 CFST 柱，墙体边界保持完好无损，这确保了严重地震后的任何残余漂移都是微不足道的。同时，增量动力学分析结果表明，IDWC模型的抗倒塌能力比传统模型高出53.5%。