基于配筋构造细节有效性评估的既有钢筋混凝土桥墩抗震性能评估方法

提出了一套基于构造细节有效性评估的既有钢筋混凝土桥墩抗震性能评估方法。该方法充分考虑到纵筋和箍筋锚固构造、箍筋阻止纵筋层间屈曲、箍筋阻止纵筋长距离屈曲以及箍筋约束混凝土等四个方面配筋构造细节对桥墩抗震性能的影响，并利用构造细节有效性评估结果得到的材料特性来计算桥墩抗剪能力、抗弯和延性变形能力。该方法不仅可以更加准确地评估桥墩的抗震性能，还可以预测箍筋、纵筋、混凝土等材料在桥墩破坏时力学性能，指出构件的抗震薄弱环节，为桥墩的抗震加固指明方向。

Aseismic performance evaluation of existing concrete piers based on effectiveness assessment of reinforcement construction details

 A method is proposed to evaluate the aseismic performance of existing concrete piers based on the effectiveness assessment of reinforcement construction details. The influence of reinforcement construction details on the aseismic performance of the piers  are discussed from four aspects: the longitudinal reinforcement and stirrup anchorage structure, the stirrups to prevent buckling of longitudinal reinforcement between two stirrups, the stirrups to prevent buckling of longitudinal reinforcement through stirrups, and the stirrups to confine core concrete. By the proposed method, the shear capacity, flexural capacity, and ductile deformation capacity can be calculated based on  the effectiveness assessment of structural details, and thus the seismic performance of bridge piers can be assessed. The performance of stirrups, longitudinal reinforcement, concrete, and other materials can be predicted when the earthquake occur. The weak parts with bad seismic performance in the member can be shown, which can provide reference for the strengthening of piers.