钢框架—钢板剪力墙装配式楼板组合结构拟动力试验研究

发布时间：2018-04-20 23:04

本文选题：拟动力试验 + 装配式楼板　；参考：《西安建筑科技大学》2015年硕士论文

【摘要】：本课题组综合考虑现浇混凝土楼板在施工过程中存在的施工周期长、现场湿作业多、结构自重大等缺点,结合相关规范中对于装配式混凝土楼板应用范围的限定,设计出一种在板底附加斜撑,在梁板、板板结点采用新型连接方式的装配式楼板体系,以探索采用新型装配式楼板体系代替现浇整体式楼板可能性,本文研究内容与成果包括:1.对按照1/4比例缩尺制作的现浇整体式楼板-钢框架剪力墙结构、采用新型连接的装配式楼板钢框架-剪力墙结构进行等效单自由度拟动力试验,通过对两种试验模型的抗震性能指标进行对比与分析,表明采用新型连接的装配式楼板,其梁板结点、板板结点连接牢靠,板底斜撑工作性能良好,板底附加斜撑的采用新型连接的装配式楼板能够有效地增强结构的整体性与变形协调能力,使之具有与现浇式混凝土楼板结构等效的良好抗震性能。因此,可以考虑在高烈度地区采用板底附加斜撑的新型楼板体系代替现浇混凝土楼板。2.以深梁理论为基础,将装配式楼板等效为水平放置的深梁,用理论方法分别计算现浇整体式混凝土楼板、新型装配式楼板以及斜撑体系的平面内等效刚度,计算结果从理论上证明了采用板底附加斜撑的新型预制装配式混凝土楼板体系具有与现浇混凝土楼板几乎相同的平面内刚度。提出考虑附加板底斜撑的新型装配式楼板结构的刚度系数比Rz,通过与刚性楼盖假设下剪力分配的结果对比分析表明,这一误差范围满足相关文献中规定的对于非刚性楼盖其剪力传递误差值的要求,证明了考虑板底附加斜撑贡献的刚度系数比Rz,能够作为衡量板底附加斜撑的楼板刚性的重要指标。3.通过数值模型分析手段,分别制作四种试件以对比分析斜撑的设置对纯框架-剪力墙结构、带有楼板的框架-剪力墙结构的影响,发现在试件处于弹塑性阶段时,斜撑的存在能够有效降低带有楼板的框剪结构沿水平荷载方向的位移,并且能够提高其结构的极限承载力,证明了斜撑具有提升带有楼板的框架剪力墙结构能够提高其结构的极限承载力,证明了斜撑具有提升带有楼板的框架剪力墙结构整体性与楼板平面内刚度的作用。同时综合考虑经济、使用功能的多方面因素,设计了一种新型八字形斜撑。数值分析结果证明:在试件处于弹性以及弹塑性阶段时,带有新型斜撑的试件较水平X斜撑试件能够有效降低沿水平荷载方向的位移,使内力分布更均匀,证明了八字型斜撑具有比水平X型斜撑更好的工作性能与应用价值。
[Abstract]:Considering the disadvantages of the construction of cast-in-place concrete floor slab, such as long construction period, more wet work on site, and significant structure, this group combined with the limitation of the application range of prefabricated concrete floor slab in relevant codes. A new type of fabricated floor system with additional diagonal brace on the bottom of the slab and a new type of connection between the beam and the slab is designed to explore the possibility of using the new type of fabricated floor system instead of the cast-in-place integral floor system. The research contents and results of this paper include: 1. The one-degree-of-freedom pseudo-dynamic test of a cast-in-place integral floor slab-steel frame shear wall structure made according to a scale of 1 / 4 is carried out using a new type of fabricated floor steel frame-shear wall structure. By comparing and analyzing the seismic performance indexes of the two test models, it is shown that the beam-slab node and plank-plate node are firmly connected, and the working performance of inclined brace of slab bottom is good. A new type of fabricated floor with additional diagonal brace on the bottom of the slab can effectively enhance the overall and deformation coordination ability of the structure and make it have good seismic performance equivalent to that of the cast-in-place concrete floor structure. Therefore, a new type of floor system with inclined brace on the bottom of the slab can be considered to replace the cast-in-place concrete floor in the high intensity area. Based on the deep beam theory, the assembled floor slab is equivalent to the horizontal deep beam, and the in-plane equivalent stiffness of the cast-in-place integral concrete floor slab, the new assembled floor slab and the inclined bracing system is calculated by the theoretical method, respectively. The calculation results show that the new precast prefabricated concrete floor system with inclined brace on the bottom of the slab has almost the same in-plane stiffness as the cast-in-place concrete floor. In this paper, the stiffness coefficient ratio of a new type of fabricated floor structure with additional slanting brace is put forward, and the results of shear force distribution under the assumption of rigid floor are compared and analyzed. This range of errors meets the requirements of the shear transmission error for non-rigid floor floors as stipulated in the relevant literature. It is proved that the stiffness coefficient of the slab with additional diagonal brace is more than Rz, which can be used as an important index to measure the rigidity of the floor with additional inclined brace on the floor. By means of numerical model analysis, four kinds of specimens were made to compare the effects of inclined bracing on the pure frame-shear wall structure and the frame-shear wall structure with floor. It was found that the specimen was in the elastic-plastic stage. The existence of oblique brace can effectively reduce the displacement of frame-shear structure with floor slab along the direction of horizontal load, and can improve the ultimate bearing capacity of the structure. It is proved that the inclined brace can raise the ultimate bearing capacity of the frame shear wall structure with floor slab, and that the inclined brace has the function of lifting the whole structure of frame shear wall with floor slab and the stiffness of floor plane. At the same time, a new type of octagonal diagonal brace is designed considering the economy and various factors of function. The numerical results show that when the specimen is in the elastic and elastic-plastic stage, the specimen with new inclined brace can effectively reduce the displacement along the horizontal load direction and make the distribution of internal force more uniform than that of the horizontal X inclined braced specimen. It is proved that the octahedral diagonal brace has better working performance and application value than horizontal X diagonal brace.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU398

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