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天津一座七层砖填充墙钢筋混凝土框架结构,按现行抗震规范校核,它经受不了1976年唐山地震,但在那次地震中,这座建筑仅填充墙受到破坏,框架只在部分节点处发生了微小的裂缝。地震时在这座建筑的室内地面和三、五、七层取得了地震记录。为了研究这类建筑的地震反应和砖填充墙的抗震作用,作者利用这些地震记录分析这座建筑的地震反应,并进行了模拟地震试验。试验和计算结果表明,地震时砖填充墙对框架起了两个有利的作用。一是在地震载荷作用的初期,地震载荷主要由填充墙承担,填充墙一旦受到破坏,作用于结构上的地震荷载就显著下降,减轻了框架的负担。填充墙另一作用是它破坏以后能起消能作用,但它在框架内的承载能力没有显著降低。
A seven-story brick reinforced concrete frame structure in Tianjin was checked against the current seismic code. It could not stand the Tangshan earthquake in 1976, but in that earthquake, the building was only filled with walls and the frame was only found at some of the nodes. A tiny crack. During the earthquake, earthquake records were recorded on the interior ground and on the third, fifth and seventh floors of the building. In order to study the seismic response of such buildings and the earthquake resistance of brick-filled walls, the authors used these seismic records to analyze the seismic response of the building and conducted simulated seismic tests. The results of the tests and calculations show that brick-filled walls played two beneficial roles for the framework during an earthquake. First, in the initial stage of the earthquake load, the seismic load is mainly borne by the infill wall. Once the infill wall is destroyed, the seismic load acting on the structure is significantly reduced, which reduces the burden on the frame. Another function of the infill wall is that it can be used to dissipate energy after it is destroyed, but its bearing capacity within the frame is not significantly reduced.