【作者】 陈元豹；

【导师】 房贞政；

【作者基本信息】 福州大学 ， 结构工程， 2003， 硕士

【摘要】 我国高效预应力混凝土结构的设计、研究与应用获得很大发展，部分预应力混凝土设计思想和后张预应力施工技术的推广，使预应力混凝土结构在房屋建筑中的应用开始进入一个崭新的阶段。无粘结预应力混凝土技术的发展，促进了新材料、新结构、新技术、新工艺的发展，自80年代以来，已从单个预应力混凝土构件发展到预应力混凝土结构：平板结构、框架结构、门式刚架、高层结构、空间结构及特种结构等。 无粘结预应力混凝土结构在地震设防区域的应用越来越广泛，但对其抗震性能的认识存在较大的分歧。况且福建省在推广应用无粘结预应力混凝土结构方面起步较晚，因此预应力技术水平还不很高，应用工程面积还不够多，不够广。以往的研究也表明：无粘结预应力混凝土构件具有与普通钢筋混凝土构件相近的延性，但其耗能能力随着预应力度的加大而有所降低，表现在滞回环的捏拢现象越来越明显。而无粘结部分预应力混凝土框架结构在反复荷载作用下的性能如何，却鲜见报道。因此，本文总结了目前人们对预应力结构抗震性能的一般看法，列举了几次强震中预应力结构的典型震害表现，计算得到了预应力结构设计反应谱的阻尼修正系数，提出了预应力结构抗震设计的主要构造措施，供工程人员参考使用；对无粘结部分预应力混凝土一般框架与扁梁框架低周反复荷载试验破坏形态进行比较，还通过两种框架节点破坏形态对进行比较阐述了扁梁柱节点的受力过程并采用混凝土斜压杆模型和钢筋混凝土桁架模型共同作用的理论来分析扁梁柱节点内、外核心区的受力机理。本文的研究为无粘结部分预应力混凝土框架在地震设防区域的应用提供参考。更多还原

【Abstract】 The development of design, research and application of the effective prestressed concrete structure, the development of the option of partially prestressed concrete and the technology of prestressed concrete with posted tendons, make the application of partially prestressed concrete structure go into a new stage. The development of the technology of the prestressed concrete with unbonded tendons has promoted the development of new materials, new structure, new technology, new craftwork. Since 1980 the application has ranged from single member to a whole structure such as flat floor, frame, high-story structure, portal rigid frame, special structure and special structure.In earthquake area, many engineers used concrete structure with unbonded tendons. But people still has lots of different opinions about its seismic behaviors. However, for it’s late that the unbonded prestressed structures are applied in Fujian, so the level is low and the range of appliance is narrow. Previous research showed that the unbonded prestressed concrete member has the similar ductility to the commom reinforced concrete member, while the energy-dissipating capacity is worse that can be found from the narrow hysteretic characteristic. But it is seldom reported how is the behavior of the partially prestressed concrete frames with unbonded tendons under the low-cyclic loading. The common view of seismic behaviors of prestressed structures is generated in this article. The amending coefficient of designed action spectrum of prestressed structures is calculated. The main construct design methods of prestressed structures are provided for the engineers. I compare the fatigue mode of the common partially concrete frames with unbonded tendons under low-cyclic loading with that of the flat-beam ones. I also compare the fatigue modes of these two kinds of joints to state the course of the force of the flat-beam joints and use the action of the concrete tilted sprint mode and the reinforced concrete joist mode to analyze the mechanism. This article provides the reference forthe application of partially prestressed concrete frames with unbonded tendons in earthquake area.更多还原