To establish a more accurate, flexible, and practical performance evaluation method for unbonded precast prestressed concrete (PCaPC) frames, a macro model was illustrated based on the exterior beam–column sub-assemblages of unbonded PCaPC frames, which considers different tensile forces of the post-tensioned tendons (i.e. unsymmetrical tendon forces) and high-strength concrete. Based on the macro model, closed-form equations of beam axial shortening were provided by precisely considering the deformation compatibility and force equilibrium conditions along the beam. In this study, the iteration method for the comprehensive evaluation of different performance limit states, as well as the load–deformation relationship of the beam–column sub-assemblages, were constructed and simplified. Accuracy and superiority of the proposed evaluation methods were verified by comparison with experimental data and evaluation results of previous methods. Both damage tolerance and self-centering performance of unbonded PCaPC frames can be more accurately measured by the proposed methods. Meanwhile, the consideration of unsymmetrical tendon forces makes the methods more flexible for different types of unbonded PCaPC frames. In addition, parametric study was conducted to understand the effects of critical design parameters on the performance limits. Preliminary design advices were given to show the application potential of this study.

为了建立一种更准确，灵活，实用的无粘结预制预应力混凝土框架评估方法，基于无粘结PCaPC框架的外梁-柱子组合，建立了一个宏观模型，该模型考虑了不同的拉力。后张预应力筋（即不对称的筋力）和高强度混凝土。在宏观模型的基础上，通过精确考虑梁的变形相容性和力平衡条件，给出了梁轴向缩短的闭合形式方程。在这项研究中，构造并简化了用于综合评估不同性能极限状态以及梁-柱子组合的荷载-变形关系的迭代方法。通过与实验数据和先前方法的评估结果进行比较，验证了所提出评估方法的准确性和优越性。所提出的方法可以更准确地测量未粘结PCaPC框架的损伤容限和自对中性能。同时，对不对称的腱力的考虑使方法对于不同类型的未粘结PCaPC框架更加灵活。此外，进行了参数研究，以了解关键设计参数对性能极限的影响。给出了初步的设计建议，以显示该研究的应用潜力。所提出的方法可以更准确地测量未粘结PCaPC框架的损伤容限和自对中性能。同时，对不对称的腱力的考虑使方法对于不同类型的未粘结PCaPC框架更加灵活。此外，进行了参数研究，以了解关键设计参数对性能极限的影响。给出了初步的设计建议，以显示该研究的应用潜力。所提出的方法可以更准确地测量未粘结PCaPC框架的损伤容限和自对中性能。同时，对不对称的腱力的考虑使方法对于不同类型的未粘结PCaPC框架更加灵活。此外，进行了参数研究，以了解关键设计参数对性能极限的影响。给出了初步的设计建议，以显示该研究的应用潜力。