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首页> 外文期刊>Bulletin of earthquake engineering >In-situ and laboratory tests of old brick masonry strengthened with FRP in innovative configurations and design considerations
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In-situ and laboratory tests of old brick masonry strengthened with FRP in innovative configurations and design considerations

机译：FRP加强了旧砖砌体的现场和实验室测试，使其具有创新的配置和设计考虑

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摘要

Worldwide cultural heritage and especially the heritage buildings in Europe are masonry buildings. Such buildings are generally capable to resist vertical loads but horizontal earthquake actions are often critical. The strengthening upgrade is generally required. One of the most promising methods for the strengthening of masonry walls is application of fibre reinforced polymers (FRP) to the surface of the wall. Three sets of the experimental research were performed recently with new innovative configurations of the fibre reinforcement placement on clay brick masonry. Within the framework of European FP7 research project PERPETUATE two sets of in-situ experiments were performed on 12 walls, belonging to two buildings approximately one hundred years old. Both buildings were made of solid bricks in low strength mortar. Third set of tests was performed in the laboratory on 16 specimens made of contemporary solid bricks in good lime-cement mortar. Tests were performed with different reinforcement configurations. Carbon FRP strips were epoxy-bonded horizontally, diagonally or combined (horizontally and vertically). Glass FRP grids were placed in the modified cement mortar over the entire surface of the wall. Specimens were tested under the constant vertical load and by a displacement controlled horizontal cyclic loading. The carbon fibre reinforced polymer strengthening significantly increased the ultimate displacement capacity in case of the horizontal and combined strengthening. The diagonal strengthening was not so effective because the failure of the diagonally strengthened specimens was governed by the peeling of strips from the masonry. The GFRP grid configuration greatly increased the load bearing capacity but not also the ultimate displacement. The shear strength of the strengthened and un-strengthened specimens was compared to the calculated values of the seismic shear load bearing capacity. For that the Triantafillou (J Compos Constr 2(2):96-104, 1998), Triantafillou and Antonopoulos (J Compos Constr ASCE 4(4):198-205, 2000), Marcari et al. (2011) and Wang et al. (Asian J Civil Eng Build Hous 7(6): 563-580, 2006) calculation models and the design guides ACI 440.7R-10 (2010) and CNR-DT 200/2004 were used.
机译：世界范围内的文化遗产，尤其是欧洲的遗产建筑是砖石建筑。这样的建筑物通常能够抵抗垂直载荷，但是水平地震作用通常很关键。通常需要加强升级。增强砌体墙最有前途的方法之一是将纤维增强聚合物（FRP）应用于墙体表面。最近进行了三组实验研究，采用了新的创新配置，将纤维增强材料放置在粘土砖砌体上。在欧洲FP7研究项目PERPETUATE的框架内，在属于大约一百年历史的两座建筑物的12面墙壁上进行了两组现场实验。两座建筑物均由低强度砂浆中的实心砖制成。第三组测试是在实验室中用优质石灰水泥砂浆在当代实心砖制成的16个标本上进行的。使用不同的钢筋配置进行测试。碳纤维增强塑料条水平，对角或水平（垂直和垂直）结合在一起进行环氧粘合。将玻璃钢格栅放置在墙体整个表面的改性水泥砂浆中。样品在恒定的垂直载荷和位移控制的水平循环载荷下进行测试。碳纤维增强的聚合物加固在水平加固和组合加固的情况下显着提高了极限位移能力。对角线加固不是那么有效，因为对角线加固标本的破坏是受砌体条剥落的影响。 GFRP网格结构大大增加了承载能力，但没有增加最终位移。将加强和未加强试件的抗剪强度与地震抗剪承载力的计算值进行比较。为此，Marcari等人，Triantafillou（J Compos Constr 2（2）：96-104，1998），Triantafillou和Antonopoulos（J Compos Constr ASCE 4（4）：198-205，2000）。 （2011）和Wang等。 （Asian J Civil Eng Build Hous 7（6）：563-580，2006）使用了计算模型和设计指南ACI 440.7R-10（2010）和CNR-DT 200/2004。

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