【作者】 李林；

【导师】 魏巍； 傅剑平；

【作者基本信息】 重庆大学 ， 土木工程， 2011， 硕士

【摘要】 钢筋混凝土板柱结构作为具有独特建筑功能的结构,由于其空间布置灵活,有效提高层高空间,可降低建筑物高度以及施工方便等优点,越来越受到人们的青睐。在地震作用或风荷载等水平作用和竖向荷载的共同作用下,板柱节点除了要传递竖向剪力外,还要传递不平衡弯矩,特别是对于板柱边节点,即使不存在水平作用,由于不对称,在自身重力作用下也会产生不平衡弯矩。目前对板柱节点的研究多数集中在内柱节点连接区,边柱节点连接区的研究则很少。本文通过在板柱边节点中应用一种比较新的抗冲切钢筋形式,即抗冲切锚栓,来研究配置抗冲切钢筋的板柱边节点的抗震性能。用锚栓作为抗冲切钢筋,有以下优点:容易安装,方便施工;可有效控制裂缝宽度;锚固好,可充分发挥锚栓强度;可在加工厂制作,精确度高。本文以锚栓的配筋率为控制参数,共进行了3个板柱边节点试件的试验研究,其中一个构件没有配置锚栓,另外两个试件配置了不同数量的锚栓。本文研究的主要内容包括:1、进行了三个板柱边节点在自重和不平衡弯矩共同作用下的低周交变加载试验,对裂缝发展、钢筋应变分布、荷载位移曲线和破坏形态等试验现象进行了分析研究。2、通过对试验数据进行整理分析,从强度退化、刚度退化、延性、耗能性能、破坏形态和滞回曲线等方面对这三个构件进行了抗震性能评价。3、通过对配置锚栓和未配置锚栓的构件的试验现象和整理数据进行对比,分析锚栓对构件承载力、变形能力和抗震性能等方面的影响。4、在试验的基础上,本文采用通用有限元软件ABAQUS对本文三个板柱边节点进行了非线性模拟分析,得到荷载位移曲线,受拉损伤图和应力图,并与试验结果进行对比。更多还原

【Abstract】 As a kind of structure having special function, reinforced concrete slab-column structure is more and more popular because it is flexible to use, easy to form and reduces unusable space created between stories and the hole height. However, during an earthquake or a strong wind, the resulting lateral loads and the vertical loads may cause significant shear and moment transfers at the slab-column connections, especially at exterior connections where unbalanced moment already exists due to unsymmetrical slab geometry. Currently, most tests and studies focus on interior connections, but there are few tests or studies about edge slab-column connections. A relatively new type of shear reinforcement named shear-stud reiforcement is applied in edge column-slab connections and study on the seismic behavior of these connections is conducted. Shear-stud reiforcement has many advantages, such as easy installation, effieient width control of shear cracks,fully-developing the yield strength of the studs, being made in the factory. Test of three full-scale reinforced concrete edge slab-column connections subjected to shear-moment transfer are completed in this paper. One specimen had no shear reinforcement and the remaining two had various arrangements of shear-stud reiforcement.The main contents of the study are as following:1.Test of three full-scale reinforced concrete edge slab-column connections subjected to shear-moment transfer are completed in this paper, the properties of the three edge slab-column connections under gravity and lateral reversal load are studied, such as the development of cracks, the strain distribution of bars, the load-displacement hysteretic curve and the failure mode.2.Based on these test results, from different aspects, such as deformation, energy dissipation, stiffness and strength, seismic peformance of reinforced concrete edge slab-column connections with shear-stud reiforcement are evaluated.3.From the comparison of the test results of the three specimens with and without shear-stud reiforcement, the effect of the stud at the strength, ductility and the seismic behavior is studied.4.Based on the experiment, it takes the finite element analysis(ABAQUS) to simulate these three specimens under monotonic loading, and then compares analytical results with experimental results, including the development of damage, the distribution of bars and the load-displacement curve.更多还原