钢筋套筒灌浆连接装配式剪力墙结构三层足尺模型子结构拟动力试验

发布时间：2018-09-05 15:27

【摘要】：为研究钢筋套筒灌浆连接装配式剪力墙结构的抗震性能,完成了1个3层足尺模型在不同强度地震作用下的子结构拟动力试验,观察其破坏现象,研究其滞回特性、变形能力、刚度退化和钢筋屈服次序等。结果表明:试验模型的破坏集中在地震作用方向的连梁和窗下墙,连梁以弯曲破坏为主,窗下墙为剪切破坏,首层墙肢出现轻微的弯曲破坏;试验过程中,连梁纵筋、墙肢竖向钢筋及连梁箍筋依次受拉屈服,试验模型实现了"强墙肢弱连梁"及连梁"强剪弱弯"的设计目标;8度多遇、设防和罕遇地震以及9度罕遇地震作用下,试验模型的抗侧刚度分别降低约5%、20%、60%和80%,对应的最大层间位移角分别为1/3 341、1/899、1/268和1/111,以层间位移角为参数,结构的破坏程度分别为完好、轻微损坏、中等破坏和倒塌;"预制底板出筋"和"预制底板不出筋"的双向叠合楼板均具有良好的整体性和平面内刚度,均可起到水平刚性隔板作用;墙体一字形截面竖向后浇段采用由2根U形钢筋组成的封闭箍代替普通箍筋具有可行性;预制夹心保温外墙的内、外叶墙之间连接可靠,外叶墙不参与结构受力,结构设计时可不考虑外叶墙的作用。
[Abstract]:In order to study the aseismic behavior of the assembled shear wall structure with reinforced sleeve grouting connection, a pseudo-dynamic test of a three-story full-scale model under different earthquake intensity was completed, and the failure phenomenon, hysteretic characteristics and deformation capacity of the substructure were observed. Stiffness degradation and yield order of steel bar etc. The results show that the failure of the test model is concentrated on the connecting beam and the wall under the window in the direction of earthquake action, the main failure of the connecting beam is bending, the wall under the window is shear failure, the limb of the first floor wall is slightly bending, and in the course of the test, the longitudinal reinforcement of the connecting beam is connected. The vertical reinforcement and stirrups of the wall legs are subjected to tensile yield in turn. The experimental model achieves the design objectives of "strong wall limbs, weak joint beams" and "strong shear and weak bending". Under the action of fortification, rare earthquake and 9 degree rare earthquake, the design objectives of "strong wall limb weak joint beam" and "strong shear weak bending" are achieved. The lateral stiffness of the test model was reduced by about 50% and 80%, respectively, and the corresponding maximum interstory displacement angle was 1 / 3 341U / 1 / 899 / 1 / 268 and 1 / 111 respectively. Taking the interstory displacement angle as a parameter, the damage degree of the structure was intact and slightly damaged. The bi-directional composite floor of "precast bottom" and "precast floor without reinforcement" has good integrity and in-plane stiffness, and can play the role of horizontal rigid partition. It is feasible to replace common stirrups with closed hoop composed of two U-shaped steel bars in the vertical back pouring section of wall with one zigzag section, and it is feasible to replace common stirrups in the vertical back pouring section of the wall with one zigzag section, and it is feasible to replace the common stirrups with the closed hoop of two U-shaped steel bars. The function of the outer leaf wall may not be considered in the design of the structure.
【作者单位】：清华大学土木工程安全与耐久教育部重点实验室;北京住总万科房地产开发有限公司;北京住宅建筑设计研究院有限公司;北京市建筑设计研究院有限公司;
【基金】：北京市科技计划(Z10110602231003)
【分类号】：TU398.2;TU317

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