Abstract In recent years, important benefits for the seismic design of precast reinforced concrete wall structures have been obtained from the use of jointed wall-to-foundation connections, where gap openings are permitted, thus resulting in a rocking motion. The lumped rotation at the wall base protects the panels from damage, while gravity loads and unbounded post-tensioned (PT) tendons, designed to remain elastic, re-center the structure after an earthquake, thus solving the problem of residual displacements. External dissipaters, herein partially unbounded mild steel bars, limit the amplitude of lateral displacements providing the required dissipating capacity. The resulting response is characterized by flag-shaped hysteretic loops. The paper investigates the parameters that may influence the design of rocking walls with supplemental energy dissipation devices in the form of mild reinforcing steel and aims to develop a parametric approach for the design of such systems. In this research, an analytical system of non-dimensional equations is developed for the design of PT tendons and dissipaters: location, area and prestressing force of the former, and location, area and unbounded length of the latter. A parametric approach suitable for the design practice is developed. This allows obtaining a simplified, quick, and accurate approach for the selection of PT tendons and energy dissipaters following a performance-based design approach. The procedure has been applied to a selected case study and validated by means of non-linear time history analyses.

中文翻译：

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预制摇摆墙 PT 筋和低碳钢耗散器设计的无量纲参数化方法

摘要 近年来，通过使用连接墙与地基连接，允许间隙开口，从而导致摇摆运动，已经获得了预制钢筋混凝土墙结构抗震设计的重要好处。墙基处的集中旋转保护面板免受损坏，而重力载荷和无边界后张 (PT) 钢筋束旨在保持弹性，在地震后重新调整结构的中心，从而解决残余位移问题。外部耗散器，这里是部分无界低碳钢棒，限制横向位移的幅度，提供所需的耗散能力。由此产生的响应的特点是旗形滞后环。本文研究了可能影响带有以低碳钢筋形式补充能量耗散装置的摇摆墙设计的参数，旨在为此类系统的设计开发一种参数化方法。在本研究中，为PT筋和消散器的设计开发了无量纲方程的解析系统：前者的位置、面积和预应力，以及后者的位置、面积和无界长度。开发了一种适用于设计实践的参数化方法。这允许根据基于性能的设计方法获得用于选择 PT 筋和能量耗散器的简化、快速和准确的方法。该程序已应用于选定的案例研究，并通过非线性时间历史分析进行了验证。