中文摘要：

对7度、8度、9度区的规则RC框架结构进行非线性动力分析,数值模型分为在各层柱底加入施工缝模型的＂带缝框架＂和不考虑施工缝影响的＂整浇框架＂两种。通过对比结构的顶点最大位移、层间位移角、塑性铰分布规律和关键构件的反应等研究施工缝对框架结构抗震性能的影响程度。结果表明,在多遇地震下,结构仍处于弹性状态,施工缝对结构的顶点位移及层间位移角等影响不大。在罕遇地震下,随着地震动增大,结构进入非线性,施工缝的影响逐渐凸显,会使顶点位移及层间位移角明显增大。施工缝使柱端更容易出现塑性铰,更易形成＂强梁弱柱＂的柱铰破坏模式。在罕遇地震下对结构进行非线性数值分析时应重视施工缝的影响作用。

英文摘要：

A dynamic nonlinear analysis was performed to study the influence of a construction joint on the aseismic behavior of a regular reinforced concrete （RC） frame structures in 7, 8 and 9 earthquake intensity regions separately. Two numerical models for the same frame structure were built, one included a construction joint and another excluded it. The factors such as the maximum vertex displacement, story drift angle, the distribution of plastic hinge, and the reaction of critical members were analyzed. The results show that a construction joint has little effect to a frame structure when it is elastic under a frequent earthquake. However, the effect becomes significant once the frame is in the plastic stage under a rare earthquake. The maximum lateral displacement and story drift angle increased, and plastic hinges turned to be diagonal at the end of columns. The influence of a construction joint on the seismic behavior of a RC frame structure should not be ignored under large earthouakes.