钢筋混凝土框架-纤维增强混凝土耗能墙结构抗震性能试验研究

高性能纤维增强混凝土（HPFRC）具有受拉应变硬化和多裂缝开展性能，是一种理想的耗能材料。将HPFRC耗能墙装配于钢筋混凝土（RC）框架，形成RC框架-HPFRC耗能墙新型抗震结构。设计制作了2个1/2比例RC框架-HPFRC耗能墙结构模型，对其进行了拟静力试验，研究其破坏机理、变形和耗能性能等；分析了RC框架和HPFRC耗能墙在峰值荷载点的有效刚度。结果表明:RC框架-HPFRC耗能墙结构可实现“大震可修”的抗震设防目标；1个框架单元内装配2片与1片耗能墙相比，其水平承载力提高了38.3%，初始侧向刚度提高了1.78倍，但后期侧向刚度仅提高20%~30%，不同损伤状态的耗能能力提高了10%~175%，侧向变形能力基本相同；RC框架和HPFRC耗能墙在峰值荷载点的有效刚度系数分别为0.11和0.13。

EXPERIMENTAL STUDY ON ASEISMIC BEHAVIOR OF REINFORCED CONCRETE FRAME-ENERGY DISSIPATION WALLS MADE WITH HIGH PERFORMANCE FIBER REINFORCED CONCRETE

High Performance Fiber Reinforced Concrete (HPFRC) is an ideal material with high energy dissipation capacity for the characteristics of high tensile ductility and fine multiple cracking. A new aseismic structure,reinforced concrete (RC) frame-energy dissipation wall made with HPFRC, was proposed. Quasi-static tests were conducted on two one-half scale RC frame-HPFRC energy dissipation wall specimens. The aseismic behavior, such as the failure mechanism, deformation, energy dissipation, and the effective stiffness at the peak load, was analyzed. Test results indicate that RC frame-HPFRC energy dissipation wall structures can achieve the aseismic fortification objective of the middle damage under a rare earthquake. Compared with the RC frame with one energy dissipation wall, the RC frame infilled with two energy dissipation walls has a higher aseismic behavior. The lateral peak load increases by 38.3%; the initial stiffness increases 178%, and lateral stiffness after yield only increases 20%~30%; the energy dissipation capacity at different damage states increase 10%~175%; but, the lateral deformation capacity is basically identical. The effective stiffness coefficients of RC frame and HPFRC energy dissipation wall at peak load are 0.11 and 0.13, respectively.