In shear wall-based buildings, locating the shear wall in plan has an important role in the resistance of seismic loading. In this article, the minimum torsion is considered as one of the main goals for optimal layout of shear walls, unlike the common method that accepts a certain torsion limit. The method presented is in accordance with the principles of design codes with emphasis on reaching the least possible torsion effect. By using a multi-objective function, based on the Pareto solutions, the torsion function behaves against the cost of a structure subjected to constraints of flexural strength, shear strength, and drift. This approach has the ability to layout shear walls in irregular plans and those which have high architectural limits. Also, it can fulfill the main goal of a structural engineer in order to satisfy the requirements of an architectural plan and obtain its minimum torsion effect as well. This method has been applied to various types of regular and irregular plans according to the classification of seismic design codes. Results show that besides minimizing the cost, the torsion effect reaches the minimum possible value considered by the seismic design code, as compared with other methods.

在以剪力墙为基础的建筑物中，将剪力墙放置在平面上对于抵抗地震荷载具有重要作用。在本文中，最小扭力被认为是剪力墙最佳布局的主要目标之一，这不同于接受一定扭力极限的常用方法。提出的方法符合设计规范的原则，重点是达到最小的扭转效果。通过使用基于Pareto解的多目标函数，扭转函数的作用是抵抗受弯曲强度，抗剪强度和漂移约束的结构的成本。这种方法具有将剪力墙布置在不规则的平面以及具有高建筑限制的剪力墙中的能力。还，它可以满足结构工程师的主要目标，以满足建筑计划的要求并获得最小的扭转效果。根据地震设计规范的分类，该方法已应用于各种类型的规则和不规则计划。结果表明，与其他方法相比，除了使成本最小之外，扭转效应还达到了抗震设计规范考虑的最小可能值。