钢纤维预应力混凝土扁梁框架抗震性能试验研究  

Experimental study on seismic behavior of fiber - reinforced prestressed concrete wide - beam frames

作　　者：郑建岚[1] 陈亚亮[1] 

机构地区：[1]福州大学土木建筑工程学院,福建福州350002

出　　处：《福州大学学报（自然科学版）》2005年第z1期124-131,共8页Journal of Fuzhou University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50278019)

摘　　要：通过拟静力、拟动力试验研究钢纤维无粘结预应力混凝土扁梁框架结构抗震性能．研究表明,钢纤维 可以有效提高预应力混凝土扁梁框架的开裂荷载、屈服荷载和极限荷载,显著提高其在剧烈地震运动作用 下的刚度、延性和耗能能力,降低结构损伤,钢纤维可以部分替代节点内箍筋来抵抗剪力．动力荷载作用 下,钢纤维扁梁框架的最大位移反应和阻尼比均比普通混凝土扁梁框架要大,而钢纤维对无粘结预应力扁 梁框架的自振频率和动力放大系数的变化影响不大．Experimental study on seismic behavior of fiber- reinforced unbonded - prestressed concrete wide - beam frames was carried out by using MTS load systems. The results show that steel fibers can effectively improve the cracking load, yield strength and ultimate strength, enhance the rigidity, ductility and energy dissipation of prestressed concrete wide - beam frames and cause less damage during high -level ground motion. Steel fibers can be used to partially replace the stirrups as shear reinforcement. Fiber reinforced wide - beam frames exhibit large displacement and large damping ratio after yielding of structure. Otherwise, steel fibers could not change the internal dynamic response such as natural frequency and dynamic magnification factor of prestressed concrete wide - beam frame.

关 键 词：钢纤维 无粘结预应力 扁梁框架 拟静力 拟动力 抗震性能 

分 类 号：TU394[建筑科学—结构工程]