【作者】 高浪飞；

【导师】 郑建岚；

【作者基本信息】 福州大学 ， 结构工程， 2005， 硕士

【摘要】 近年来，无粘结部分预应力混凝土扁梁框架结构由于可以有效地降低层高和建筑总高，减小由于风荷载和地震力作用产生的结构内力，节省工程造价，因而得到了广泛的应用。但是对于这种结构形式的抗震性能研究工作还不完善，理论研究已滞后于工程应用的需要，因此深入进行扁梁框架结构的研究，在经济合理的情况下确保该结构的抗震安全性具有重要的理论意义和应用价值。　 本文总结了国内外对钢筋混凝土扁梁框架结构、拟动力试验和钢纤维混凝土的研究，概括了钢纤维混凝土的性能及其对框架抗震性能的影响。在总结前人工作的基础上，进行了三榀单层单跨的预应力混凝土扁梁框架结构的拟动力抗震性能试验研究。对强度等级相同、尺寸一样的钢纤维混凝土框架和普通混凝土框架进行拟动力抗震试验，分析比较三榀框架在地震作用下的裂缝发展变化、刚度退化、加速度和位移以及耗能能力差异，研究掺入钢纤维对预应力扁梁框架的抗震性能的影响。　 同时，对遭受地震荷载作用后的三榀框架进行低周反复荷载试验，研究该三榀震损框架的最后破坏形态、滞回特性、位移延性、耗能能力及刚度退化等抗震性能。　 研究结果表明：将钢纤维混凝土应用于框架结构，提高了预应力扁梁框架的抗震性能。预应力混凝土扁梁框架只要设计得当，可以形成梁铰耗能机构及整体破坏机制，且具有较好的耗能及抵抗强震的能力，可以在地震区推广使用。该研究成果可为扁梁框架结构体系的设计和有关规范的增补提供依据，具有很好的应用前景。更多还原

【Abstract】 Recently, the unbonded partially prestressed concrete flat-beam structures are widely beingused due to reducing the floor height and total height efficiently, cutting down the internalforce of structures caused by wind load and seismic effect and economizing the costs.But the aseismatic study of this kind of structure is not perfect at present and study ontheory is lagged behind the demand of engineering apply. It has important theoreticmeaning and applied value to go deep into the study about this kind of structures andmake it secure when encountering the earthquake. This thesis sums up the study of the reinforced concrete flat-beam framestructures, pseudo-dynamic test, the steel-fiber concrete and generalizes theperformance of the steel-fiber concrete and its influence to the seismic resistance ofthe frame. Based on the previous research results, the test study on pseudo-dynamictest of three monolayer and single-stride prestressed concrete flat-beam framestructures are mostly carried through. The pseudo-dynamic test of three frames withthe same size and the same intension grade are conducted. One frame is made ofordinaryconcrete and the other two are made of steel-fiber concrete. The difference ofthe aseismatic behaviors of the three frames is analyzed and compared, with emphaseson the development and variety of crack, stiffness degeneration, the difference ofacceleration, displacement and energy-dissipation capacity, to find the influence ofsteel-fiber concrete to the aseismatic behaviors of the prestressed concrete flat-beamframe structures.　　 After the pseudo-dynamic test, the low-cyclic reversed loading tests of the threeframes are carried out. The emphases of study are on failure mechanism, hystereticproperty, displacement ductility, energy-dissipation capacity and stiffnessdegenerationof the three damaged frames. The results show, when steel-fiber concrete is used in the flat-beam framestructures, the prestressed concrete flat-beam frames can have the more satisfiableaseismatic behaviors. When designed rationally, the frames can form beam hingeenergy-dissipation machine and total destroy mechanism. The structural system has II<WP=4>considerable energy-dissipation capacity and the strong seismic resistance behavior,so can be generalized and used in medium seismic zones. This fruit of the study canprovides new methods to the supplement of concerned criterion and the design aboutthe flat-beam frame structure更多还原