Design objectives should be determined based on damage quantification in performance-based seismic design. To do this, the damage development and the damage model suitable for hybrid joints, which are critical substructures in self-centering frames, are studied. The damage intervals and quantified performance indexes are then suggested. Based on the existing tests, 29 hybrid joints with various structural features are modeled and loaded with cyclic loadings. The damage model, which is composed of the maximum deformation, the residual deformation and the cumulative energy, is adopted to investigate the damage development in hybrid joints. It has been demonstrated that the initial prestressing force in post-tensioned tendons has little influence on damage states of hybrid joints. The stirrup reinforcement ratio, the self-centering parameter and the concrete strength can dramatically diminish the damage developed in hybrid joints under large deformations. Linear trends are incarnated in their relations with the non-negative parameter in the damage model. The damage intervals and quantified performance indexes applied to hybrid joints are suggested. Performance indexes are enhanced compared with traditional concrete members. This study demonstrates the performance promotion and the preponderance of damage control in self-centering frame structures.

中文翻译：

---

基于性能的混合关节损伤评估

设计目标应基于基于性能的抗震设计中的损伤定量确定。为此，研究了适合于混合接头的损伤发展和损伤模型，这是自定心框架中的关键子结构。然后提出损坏间隔和量化的性能指标。在现有测试的基础上，对具有各种结构特征的29个混合接头进行了建模，并对其施加了周期性载荷。采用由最大变形，残余变形和累积能量组成的损伤模型来研究混合接头的损伤发展。已经证明，后张预应力筋中的初始预应力对混合接头的损伤状态影响很小。箍筋增强比，自定心参数和混凝土强度可以显着减小大变形下混合节点产生的损伤。将线性趋势与损伤模型中非负参数的关系体现出来。提出了适用于混合接头的损伤间隔和量化性能指标。与传统的混凝土构件相比，性能指标得到了提高。这项研究证明了在自定心框架结构中性能的提升和损伤控制的优势。与传统的混凝土构件相比，性能指标得到了提高。这项研究证明了在自定心框架结构中性能的提升和损伤控制的优势。与传统的混凝土构件相比，性能指标得到了提高。这项研究证明了在自定心框架结构中性能的提升和损伤控制的优势。