地震作用下RC构件耗能能力的计算方法研究

为了优化地震作用下研究钢筋混凝土构件损伤量化的理论流程，建立合理的耗能能力计算方法，基于初始滞回阶段RC构件耗能能力衰变规律，在研究了同类型试件相等加载位移在不同滞回阶段D-n曲线形态特征的基础上，提出了后续滞回阶段耗能能力衰变模型。通过对不同滞回阶段的衰减指数进行拟合分析，提出了耗能能力计算方法中特征参数A、B、x₀、y₀的修正公式，且优化后的计算方法较优化前，其准确性和稳定性均有所提高。对于从PEER数据库选取的80个受弯破坏试件耗能估算而言，该方法同样表现出较好的准确性和适用性。

STUDY ON CALCULATION METHOD OF ENERGY DISSIPATION CAPACITY OF RC MEMBERS UNDER EARTHQUAKE ACTION

To optimize the theoretical flow of studying the damage quantification of reinforced concrete members under earthquake actions, and to establish a reasonable calculation method of energy dissipation capacity, a decay model of energy dissipation capacity in the subsequent hysteretic stage is proposed based on the decay law of energy dissipation capacity of RC members in the initial hysteretic stage after studying the shape characteristics of D-n curves of the same type of specimens with equal loading displacement in different hysteretic stages. By fitting and analyzing the attenuation exponents in different hysteretic stages, the modified formulas of characteristic parameters A, B, x0, y0 in the calculation method of energy dissipation capacity are proposed, and the calculation method after optimization is better than that before optimization. Its accuracy and stability have been improved. For the energy dissipation estimation of 80 flexural failure specimens selected from PEER database, this method also shows good accuracy and applicability.