带填充墙钢框架结构抗侧力性能试验及理论研究

Experimental and theoretical research on lateral load resistance of steel frames with infilled walls

介绍了7榀钢框架及带填充墙钢框架结构的水平静力及低周反复加载试验。通过测试有墙和无墙钢框架试验模型在侧向力作用下的变形全过程,得到了墙体对钢框架结构强度和刚度的影响,了解了节点的破坏特征及墙体本身的工作性能,得到了有墙及无墙钢框架结构的滞回性能。试验中发现,填充墙体和钢框架之间的连接性能很好,墙体和框架可以共同工作。通过参数分析,给出了结构抗震弹性层间角位移的建议取值为1/350。在理论分析的基础上,提出了填充墙框架体系抗侧刚度简化公式,得到了试验结果的验证。

In this paper, the tests of seven steel frames with and without autoclaved aerated concrete (AAC) infilled walls under lateral static loading and low-cycle repeated loading are introduced. Through recording the whole deforming process of the steel frames with and without infilled walls under the lateral forces, the effect of AAC infillled walls on the load-bearing capacity and stiffness are obtained, the failure characteristics of connections and the performances of infilled walls are found. In addition, the hysteretic behavior of steel frames with and without AAC infilled walls are achieved as well. The tests prove that the connections between infilled walls and steel frames behave very well and can play an important role in the mutual work of infilled walls and steel frames. Theoretical analysis is carried out through finite element program ANSYS, some of the factors that affect the experimental results are discussed. Furthermore, the elastic interstory angular displacement value 1/350 is given by parametric analysis. Finally, the simplified equation of lateral stiffness of steel frame with infilled walls is presented based on the theoretical analysis and the accuracy of the equation is proved by the test results.