目前预应力装配式框架结构的应用逐渐扩大，但适用于其结构的连接方法与理论研究尚有欠缺。与此同时近年来装配式结构倒塌事情屡有发生，结构抗连续倒塌的研究对结构安全、社会安定等方面具有积极的意义。相比于有粘结预应力装配式结构，无粘结预应力装配式结构的研究还甚少，本文针对无粘结预应力装配式框架结构抗连续倒塌性能分析。主要研究内容如下： （1）本文参照国内一现有的2层2跨平面框架倒塌试验，借助SAP2000有限元软件建模并对其加以侧向力进行分析，对比分析得：数值模拟结果与试验结果体现出基本吻合，从而验证了本文所采用的梁、柱单元类型、塑性铰本构关系、以及建模分析方法的正确性，为抗连续倒塌分析提供了有效分析手段。 （2）采用拆除构件法，借助于非线性静力分析方法，对无粘结预应力框架结构抗连续倒塌性能进行了分析。提取了失效点不同位移量的塑性铰分布，并以荷载储备系数LRR为定量指标得：在拆除长边中柱后，剩余上部结构抗连续倒塌极限承载能力最弱。同时结构不同部位的抗连续倒塌机制也不同，并不是结构所有的部位都存在悬链线机制。 （3）借助于非线性动力分析方法，对无粘结预应力框架结构在正常使用情况下进行了拆除构件分析。结果表明：拆除失效柱后，结构弯矩、剪力、轴力的分布形式与原结构相比发生了变化，剩余结构内力进行了重分布；与失效柱相连梁、相邻柱构件变化明显，这些梁柱构件更易发生连锁破坏导致结构发生连续倒塌；远离拆除柱端的负弯矩以及剪力增幅显著，对整体框架来说，横向影响幅度大于纵向。与1倍荷载下的非线性静力分析结果一致，在正常使用情况下，4种工况均不会发生连续倒塌，根据不同柱失效时失效点位移由小到大排序为：内部柱失效、短边中柱失效、长边中柱失效、角柱失效。 综上，角柱、长边中柱失效对预应力筋为装配式框架结构抗连续倒塌性能影响显著，设计时，应注意加强角柱和长边中柱构件构造。无粘结预应力筋为装配式框架结构提供了足够的储备荷载可保证结构在正常使用情况下不会发生连续倒塌。

At present, the application of pre-stressed fabricated frame structure is gradually expanding, but the connection method and theoretical research for its structure are still insufficient. At the same time, in recent years, the collapse of assembled structures happens frequently. The research of structural anti-continuous collapse is of positive significance to structural safety and social stability. Compared with bonded pre-stressed fabricated structure, the research on unbonded pre-stressed fabricated structure is less. In this paper, the performance of unbonded pre-stressed fabricated frame structure against continuous collapse is analyzed. The main research contents are as follows: (1) In this paper, the existing collapse test in China is used as a reference. And the finite element modeling of the collapse resistance test of plane unbonded pre-stressed reinforced concrete frame structures subjected to two-storey and two-span lateral forces is carried out by SAP2000(a finite element software). The numerical simulation results are in good agreement with the experimental results, which verifies the constitutive relationship, element type and modeling analysis method adopted in this paper. (2) The non-linear static analysis method is used to analyze the continuous collapse resistance of space unbonded prestressed concrete frame structures. According to the distribution of the plastic hinge and setting the load reserve coefficient LRR as the quantitative index, the residual capacity of the remaining superstructure is the weakest after the long-side column is removed.At the same time, different parts of the structure have different mechanisms to resist continuous collapse, and there is no catenary mechanism in all parts of the structure. (3) Using the method of non-linear dynamic analysis, the normal use of space unbonded pre-stressed reinforced concrete frame structure is analyzed. The results show that the distribution of structural bending moment, shear force and axial force of the structure has changed compared with the original structure, and the residual internal force of the structure has redistributed after the failure column is removed. The change of the beam and adjacent column members connected with the failure column is particularly obvious. These beam-column members are more likely to occur chain failure, which leads to the continuous collapse of the structure. The influence of the transverse frame is larger than that of the longitudinal frame. The negative bending moment and shear increase at the end of the demolished column are obviously larger than those at the end of the demolished column. Consistent with the results of non-linear static analysis under double loads, no continuous collapse will occur in the four working conditions under normal use. When different failure columns fail, the displacement of failure points will be from small to large: internal column,short side central column ,long side central column ,corner column failure. In conclusion, the failure of corner columns and long-side columns has a significant impact on the structure's continuous collapse resistance. In design, attention should be paid to strengthening the construction of corner columns and long-side columns. The unbonded pre-stressing tendons provide load for the assembled frame structure to ensure that the structure will not collapse under normal service conditions.