The uneven distributions of mass and stiffness in the case of multistorey concrete buildings lead to a torsion sensitivity of those civil structures under dynamical loadings like earthquakes or wind and gusts. In order to minimize the overall torsion, it is imperatively necessary to reduce the distance between the centre of mass (CM) and centre of stiffness (CS) in the design stage. In this context, the main purpose of this paper is to present a theoretical method of reducing torsion by minimizing the distance between CM and CS at the level of each floor of the structure. Principal stiffness axes are also changed in convenient directions so that the movement of the structure leads to a favourable plastic mechanism in the fundamental mode of vibration. To achieve the goal, the main objective is to change the dimensions and orientations of the pillars located on the perimeter of the structures. The described method was used to study: irregular shaped structures in plan; structures with stairs or with central concrete core; structures with elevation retractions. The overall torsion reducing was achieved with Matlab programs, and the verification of the results was carried out by using the software ETABS 2016.

中文翻译：

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一种减少钢筋混凝土多层不规则结构总扭力的方法

在多层混凝土建筑中，质量和刚度的不均匀分布会导致这些土木结构在地震，风和阵风等动态载荷下的扭转敏感性。为了使总扭转最小，在设计阶段迫切需要减小质心（CM）和刚度（CS）之间的距离。在这种情况下，本文的主要目的是提出一种理论方法，该方法通过在结构的每个楼层处最小化CM和CS之间的距离来减小扭转。主刚度轴也沿方便的方向更改，以便结构的运动在基本振动模式下产生良好的塑性机制。为了达到目标，主要目的是改变位于结构外围的支柱的尺寸和方向。所描述的方法用于研究：平面中不规则形状的结构；具有楼梯或中央混凝土芯的结构；高程回缩的结构。使用Matlab程序可实现整体扭矩的降低，并使用ETABS 2016软件对结果进行验证。