自密实高强混凝土框架结构的抗震性能研究

制作了两榀尺寸与配筋相同、混凝土强度基本相等的钢筋高强混凝土框架,两榀框架分别采用自密实混凝土和普通混凝土浇筑.采用MTS伺服加载系统施加低周反复水平荷载以研究自密实混凝土框架结构的抗震性能.通过试验,对比分析了自密实混凝土框架与普通混凝土框架在破坏过程及开裂、屈服、破坏等特征值上的异同,深入研究了自密实混凝土框架结构的延性、等效粘滞阻尼系数及功比指数等抗震性能.

Study of earthquake resistance behavior of self-compacting high-strength concrete frame

Two frames with the same size and reinforcement were made, which were poured with self-compacting concrete and national concrete respectively. The concretes strengths of the tow frames is approximately equal. To study the earthquake resistance behavior of self-compacting concrete frame, MTS loading system was used to put the two frames under low-cyclic horizontal loading. Through the test, the similarities and differences between the two frames of their destructive processes and their characteristic values such as cracking load, yield load and failure load were contrasted and analyzed, and then the frames' ductility coefficient, equivalent adhesive damper coefficient and working index were studied.