IN-PLANE AND OUT-OF PLANE RESPONSE OF A REINFORCED MASONRY INFILL MADE BY AN INNOVATIVE NEW BRICK UNIT
IN-PLANE AND OUT-OF PLANE RESPONSE OF A REINFORCED MASONRY INFILL MADE BY AN INNOVATIVE NEW BRICK UNIT
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由创新砖单元制成的钢筋砌体填充物的面内和面外响应
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
V. Nikolopoulou
中科院分区：
文献类型：
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作者：
E. Vintzileou;V. Palieraki;C. Adami;V. Nikolopoulou
在INSYSME项目（www.insysme.eu）[1]的框架内，作者和XALKIS S.A.公司开发了一种填充墙的创新解决方案。一个特殊的，垂直穿孔，砖单位已设计和生产。垂直孔位于砌体单元的表面附近，以满足两个需求，即（a）使用垂直钢筋增强填充物的平面外承载力，以及（B）安装（电气和垂直）的定位。在希腊目前的填充墙施工实践中，所有设施都是通过破坏粘土单元形成必要的凹部来安装在墙上的。由于使用了设计的粘土单元，避免了这种（相当广泛的，即使是局部的）干预。应该注意的是，垂直钢筋仅定位在沿填充墙沿着的有限数量的垂直孔中，因为所需的钢筋百分比相当小。因此，砖的构造不具有靠近填充物表面的开放垂直孔，因为它们应该在填充之前填充砂浆以达到墙壁的平面。但是，为了既方便竖向钢筋的定位，又方便设施的安装，每个竖向孔的外壳上都设有两个凹槽，使外砖墙在施工时易于拆除。填充物的水平钢筋在墙的施工期间定位在床缝中，而垂直钢筋在墙的施工之后放置（在特殊的垂直孔中）。此外，如果需要，填充物和其上方的梁之间的简单滑动连接件可用于防止平面外塌陷。应注意的是，钢筋（水平或垂直）未锚固到RC构件中。为了评估所提出的解决方案的性能，进行了一个实验活动的单跨单层RC填充框架。两个全尺寸试样进行了测试。第一个进行面内循环试验，而第二个进行重复的面外试验。滞后回路的整个加载历史，观察到的损坏在几个漂移值和最大电阻的填充物，并讨论。将获得的结果与希腊目前使用的填充物测试期间记录的结果进行比较。结果表明，创新解决方案的性能最大限度地降低了损坏风险和人类生命风险，因为它确保了RC填充框架在负载和变形能力方面的显着增强行为。
Within the framework of INSYSME project (www.insysme.eu ) [1], an innovative solution for infill walls has been developed by the authors and the firm XALKIS S.A. A special, vertically perforated, brick unit has been designed and produced. Vertical holes are located close to the faces of the masonry unit, to serve two needs, namely (a) the enhancement of the out-of-plane bearing capacity of the infill, using vertical reinforcement and (b) the positioning of installations (electrical and plumping). In the current practice of infill wall construction in Greece, all facilities are installed on the walls by forming the necessary recesses through breaking of the clay units. Such a (quite extensive, even though local) intervention is avoided, thanks to the use of the designed clay unit. It should be noted that the vertical reinforcement is positioned only to a limited number of vertical holes along the infill wall, as the required percentage of reinforcement is rather small. Therefore, the brick was constructed not to have open vertical holes close to the faces of the infill, because they should be filled with mortar to reach a plane surface of the wall before plastering. However, in order to facilitate both the positioning of vertical reinforcement and the installation of facilities, the exterior shell of each vertical hole is provided with two grooves that make the exterior brick wall easy to remove during construction. The horizontal reinforcement of the infill is positioned in the bed joints during the construction of the wall, whereas the vertical reinforcement is placed (in the special vertical holes) after the construction of the wall. Additionally, simple sliding connectors between the infill and the beam above it may be used to prevent out-of-plane collapse, if needed. It should be noted that the reinforcement (either horizontal or vertical) is not anchored into the RC elements. In order to assess the performance of the proposed solution, an experimental campaign is carried out on a one-bay singlestorey RC infilled frame. Two full scale specimens are tested. The first is subjected to in-plane cyclic tests, whereas for the second one repeated out-of-plane test are performed. Hysteresis loops for the entire loading history, the observed damage at several drift values and the maximum resistance of the infill are presented and discussed upon. The obtained results are compared to the results recorded during testing of the infills currently used in Greece. It is shown that the performance of the innovative solution minimizes damage risk and human lives risk, as it ensures a significantly enhanced behaviour of the RC-infilled frame in terms of both load and deformability capacity.