混凝土框架外挂泡沫混凝土轻质墙板振动台试验研究

发布时间：2018-04-01 22:07

本文选题：钢筋混凝土框架　切入点：泡沫混凝土　出处：《武汉理工大学》2015年硕士论文

【摘要】：预制装配整体式混凝土结构体系经历了从预制部品到预制墙板、楼板再到预制主体结构三个阶段的发展。“混凝土框架外挂轻质泡沫混凝土墙板振动台试验研究”是现阶段我国预制装配式混凝土建筑技术研究领域里一项理论研究与工程应用相结合的重要课题。本文主要研究工作如下所示。(1)采用泡沫混凝土、陶粒泡沫混凝土和防锈涂层钢筋制作了8片混凝土框架模型外挂轻质墙板,完成了2个模型比为1/2的现浇混凝土框架外挂轻质泡沫混凝土墙板结构模型的地震模拟振动台试验,其中X向试验的外墙板挂在平行地震方向,Y向试验墙板挂在垂直于地震方向。得到了三条地震波作用下模型的自振频率、加速度、位移等动力响应。(2)根据试验现象分析了挂板节点区域在两个方向地震作用下的破坏形态。试验结果表明,在罕遇地震作用下,X向试验轻质墙板的裂缝主要分布在挂板节点周围,Y向试验轻质墙板的裂缝主要集中在窗洞口。两个方向节点预埋件均保持完好,未发生墙板脆断、节点预埋件拔出或预埋件被拉断等严重破坏现象。单钢板形式节点比双钢板形式的节点破坏明显,加陶粒的墙板破坏较不加陶粒的墙板破坏现象明显。但差别不大,均能满足安全要求。(3)模拟振动台试验结果表明:两个方向试验结束后,测得的模型自振频率均比试验前测得的自振频率有所下降,降低幅度不大,说明结构有损伤。X向地震作用下,模型屋面在人工波作用下的加速度峰值最大。Y向地震作用下,模型屋面在Taft波作用下的加速度峰值最大。Y方向地震作用下框架位移大于X向的位移。表明不同方向挂板对结构刚度及自振频率产生影响,从而导致两个方向的试验模型对不同地震波的加速度和位移响应不一致。
[Abstract]:The precast assembly integral concrete structure system has experienced from prefabricated parts to precast wallboards. The development of three stages from floor slab to precast main structure. "Research on shaking table test of concrete frame with light foamed concrete wall slab" is a theoretical research in the field of technical research of precast prefabricated concrete building in China at present. The main research work in this paper is as follows: (1) Foamed concrete, Eight pieces of concrete frame models were made of ceramsite foam concrete and anti-rust coated steel bar, and two cast-in-place concrete frames with a ratio of 1 / 2 were tested by seismic simulation shaking table. The external wall plate of X direction test is hung in parallel earthquake direction and Y direction wall board is hung perpendicular to earthquake direction. The natural frequency and acceleration of the model under the action of three seismic waves are obtained. According to the experimental phenomena, the failure patterns of the joint region of the hanging plate under the action of earthquake in two directions are analyzed. The experimental results show that, Under the action of rare earthquake, the cracks of light-weight wallboard in X direction test are mainly distributed around the joints of the hanging plate and the cracks of the light-weight wallboard are mainly concentrated at the opening of the window. The embedded parts of the two directional nodes are in good condition, and there is no brittle fracture of the wall plate. The damage of single steel plate joint is more obvious than that of double steel plate type joint, and the damage phenomenon of wall board with ceramsite is more obvious than that without ceramic grain, but the difference is not obvious. The results of simulated shaking table test show that the natural vibration frequency of the model is lower than that measured before the test. It shows that under the action of damage. X direction earthquake, the maximum acceleration peak value of the model roof under the action of artificial wave. The displacement of the frame is larger than that of the X direction under the maximum acceleration peak of the model roof under the action of Taft wave. The results show that the structure stiffness and the natural vibration frequency are affected by the different directions of the hanging plate. Therefore, the response of the two direction test models to the acceleration and displacement of different seismic waves is inconsistent.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU375.4

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