施工缝对混凝土框架结构抗震性能影响研究

Study on the Influence of Construction Joint on Seismic Performance of Concrete Frame Structure

为进一步研究施工缝对钢筋混凝土框架结构抗震性能的影响,文中提出一种新的模型对不同地震烈度区以及不同高宽比下设计的钢筋混凝土框架结构进行非线性时程分析。结果表明,施工缝对钢筋混凝土框架抗震性能的影响与结构非线性密切相关,会进一步增加顶部位移和层间位移,改变层间位移分布,加剧关键构件的局部反应。对于抗震能力较低的结构,施工缝的影响不容忽视。

In order to further study the influence of construction joint son the seismic performance of reinforced concrete frame strucutres,this study proposes a new model for the nonlinear time-course analysis of reinforced concrete frame structures designed under different seismic intensity areas and different height and width ratios.The results show that the influence of the construction joint on the seismic performance of the reinforced concrete frame is closely related to the structural nonlinearity,which will further increase the top displacement and the interlayer displacement,change the interlayer displacement distribution,and aggravate the local reaction of the key components.For structures with low seismic capacity,the impact of construction joints cannot be ignored.