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首页> 外文期刊>Engineering Structures >Seismic strengthening of low-rise reinforced concrete frame structures with masonry infill walls: Shaking-table test
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Seismic strengthening of low-rise reinforced concrete frame structures with masonry infill walls: Shaking-table test

机译：带砌体填充墙的低层钢筋混凝土框架结构的抗震加固：振动台试验

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摘要

This study investigates experimentally the seismic behavior of reinforced concrete (RC) frames damaged by earthquakes and retrofitted with masonry infill walls. To this end, a 2/5 scale one-bay one story RC frame structure designed only for gravity loads (without seismic design consideration) was built in laboratory. Initially, it was subjected to several shakings to induce a moderate level of damage characterized by a maximum lateral drift ratio of 1.5% and a residual deformation of 0.12%. Next, the RC frame structure was retrofitted with two masonry infill walls oriented in the direction of motion and subjected to four uniaxial seismic simulations. The structure with infills experienced drift ratios of up to about 5% without signs of catastrophic collapse, and retained a reasonable energy dissipation capacity after the walls reached their maximum strength. The maximum drift reached was surprising given the brittleness of masonry. The results of the test open a realm of the possibilities for infill walls as a seismic retrofit solution. Finally, on the basis of experimental data acquired, a model for estimating the force-displacement relationship of the infills is proposed.
机译：这项研究实验研究了钢筋混凝土（RC）框架的地震行为，这些框架由于地震而受损，并用砖石填充墙进行了改造。为此，在实验室中建造了仅用于重力载荷（不考虑地震设计）的2/5比例单舱单层RC框架结构。最初，将其进行几次摇晃以引起中等程度的损坏，其特征在于最大横向漂移率为1.5％，残余变形为0.12％。接下来，对RC框架结构进行了翻新，安装了两个沿运动方向定向的砖石填充墙，并进行了四次单轴地震模拟。带有填充物的结构的漂移比高达5％，而没有灾难性的崩溃迹象，并且在墙体达到最大强度后仍保持了合理的能量消散能力。考虑到砌体的脆性，达到的最大漂移令人惊讶。测试结果开辟了填充墙作为地震改造解决方案的可能性。最后，基于获得的实验数据，提出了一种用于估计填充物的力-位移关系的模型。

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