型钢高强高性能混凝土框架结构抗震性能的试验研究

EXPERIMETAL STUDY ON SEISMIC BEHAVIORS OF STEEL REINFORCED HIGH STRENGTH AND HIGH PERFORMANCE CONCRETE FRAME

型钢高强高性能混凝土组合结构刚度大、承载力高,该结构充分发挥了混凝土材料的高抗压强度、高耐久性和优良工作特性的优点,其内置型钢可以明显地改善高强高性能混凝土脆性破坏的特征。采用MTS伺服加载系统进行了一榀两跨三层型钢高强高性能混凝土框架结构的拟静力试验研究,观测了在低周反复荷载作用下型钢高强高性能混凝土框架结构的裂缝开展和破坏模式,并分析了结构的力学特性,得到了在循环荷载作用下框架结构的荷载-位移滞回曲线,给出了型钢高强高性能混凝土框架结构的水平承载能力、变形、刚度和耗能等抗震特性参数的取值,对承载力和刚度的衰减规律进行了分析。研究结果显示型钢高强高性能混凝土框架结构具有良好的抗震性能,该研究可为型钢高强高性能混凝土框架结构的工程应用提供设计参考。

Steel reinforced high strength and high performance concrete （SRHSHPC） composite structure has large integral stiffness and high load-bearing capacity, as well as good endurance and excellent construction of concrete. In addition, the encased steel can meliorate the brittleness of concrete failure in SRHSHPC composite structures. A specimen of SRHSHPC frame with two-bay and three-story is tested under the cyclic load provided by the MTS loading system. During which, the crack propogation and the failure features of the structural members are observed. According to the test result, the loading-displacement hysteretic curves of the SRHSHPC frame are obtained, and the lateral resistance capacity, deformation feature, rigidity and energy-dissipating characteristic are quantitatively given. Moreover, the degradations of the bearing capacity and rigidity are also analyzed. As a result, good seismic behaviors of SRHSHP composite frame are verified.