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首页> 外文期刊>Journal of Earthquake Engineering >A COMPARATIVE STUDY OF STRENGTHENING AND RETROFITTING MEASURES FOR UNREINFORCED BRICK MASONRY MODEL UNDER CYCLIC TESTING
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A COMPARATIVE STUDY OF STRENGTHENING AND RETROFITTING MEASURES FOR UNREINFORCED BRICK MASONRY MODEL UNDER CYCLIC TESTING

机译：循环试验下未加固砖混砌体模型加固与加固措施的比较研究

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摘要

An experimental study on half-scale brick-masonry models with different strengthening and retrofitting measures has been studied under cyclic loading in a quasi-static test facility. The strengthening measures undertaken for the studies are the horizontal bond beam at the lintel and sill level with a combination of vertical reinforcement at corners and openings. The retrofitting measures studied are grouting with epoxy-sand-mortar and cement-grout-inject ion with welded wire mesh in the cracked region. The tests reveal that the horizontal bond beam at lintel level with vertical reinforcement is effective in reducing the cracking above the lintel level. The insertion of an additional sill-band significantly reduces the cracking in walls. The epoxy-sand-mortar techniques for retrofitting of cracked regions prove to be effective enough to restore the initial strength, stiffness and deformation capacity. Although specimen retrofitted with cement-grout-injection with welded wire mesh is effective to regain the ultimate strength yet the brittle failure is observed as the specimen is stressed beyond the elastic limit.
机译：在准静态测试设施中，在循环荷载下对具有不同加固和改型措施的半尺寸砖石模型进行了试验研究。研究中采取的加固措施是在门the和门槛处采用水平粘结梁，在拐角处和开口处采用垂直加固。研究的改造措施是在裂缝区域用环氧树脂砂浆注浆和水泥浆注浆并通过焊接金属丝网进行注浆。测试表明，在石水平处的水平粘结梁具有垂直加固，可有效减少在above石水平以上的裂缝。附加的门槛带的插入大大减少了墙体的开裂。事实证明，用于修补裂纹区域的环氧砂浆技术足以恢复初始强度，刚度和变形能力。虽然用水泥丝网注浆并通过焊接金属丝网翻新的样品可以有效地恢复极限强度，但是由于样品受到的应力超过弹性极限，因此观察到了脆性破坏。

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