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首页> 外文期刊>Bulletin of earthquake engineering >Assessment of out-of-plane behavior of non-structural masonry walls using FE simulations
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Assessment of out-of-plane behavior of non-structural masonry walls using FE simulations

机译：使用FE模拟评估非结构砌体墙壁的面外行为

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Having orthotropic two-way bending, out-of-plane (OOP) behavior of non-structural masonry walls is one of the most challenging topics among professional engineers and researchers. This study is devoted to investigate OOP behavior of non-structural masonry walls with in-plane isolated joints to accommodate inter-story drifts. This is done using pre-validated finite element (FE) models of 99 walls with different boundary conditions (BCs), different amount of bed joint reinforcements (BJRs) and different opening details under uniform monotonic OOP pressure. Effect of vertical seismic acceleration is also investigated. Obtained results indicated that BJRs almost always increased ultimate OOP strength of the walls regardless of their BC, opening details, and level of vertical seismic acceleration. However, BJRs did not necessarily increase response modification factor of the walls. Comparing ultimate strengths from FE results with those from yielding line theory (YLT), which is adopted by some codes and guidelines, revealed that YLT is a reliable simplified technique in order to estimate OOP strength of reinforced and unreinforced non-structural masonry walls with or without openings. Both ultimate OOP strength and deformation capacities and response modification factor of the walls are decreased by increasing downward vertical seismic acceleration. This is due to the fact that downward seismic acceleration tends to reduce self-weight axial compression of the walls. From OOP pressure-deformation curves, overstrength and response modification factors of the walls are evaluated and compared with those suggested by ASCE 7. It is seen that walls with openings have significantly higher response modification factors compared with solid walls.
机译：具有正交的双向弯曲，非结构砌体墙壁的平面外（OOP）行为是专业工程师和研究人员中最具挑战性的主题之一。本研究致力于调查非结构砌体壁的OOP行为与平面内隔离接头以适应故事际漂移。这是使用99壁的预验证的有限元（FE）型号完成，其中99个墙壁，不同的边界条件（BCS），不同量的床接头增强（BJR）和不同的单调OOP压力下的不同开口细节。还研究了垂直地震加速的影响。获得的结果表明，无论其BC，打开细节和垂直地震加速度水平如何，BJR几乎总是增加了墙壁的最终OOP强度。然而，BJRS不一定增加墙壁的响应修改因子。将来自FE结果的最终优势与来自屈服线理论（YLT）采用的FE结果，揭示了YLT是一种可靠的简化技术，以估算加强和未原始的非结构砌体墙体的oop强度没有开口。通过增加向下的垂直地震加速度，壁的最终OOP强度和变形容量和壁的响应改性因子降低。这是由于向下地震加速度倾向于减少壁的自重轴向压缩。从OOP压力变形曲线，评估墙壁的过度长度和响应修改因子，并与ASCE 7所示的那些相比。看到具有开口的墙壁与固体墙壁相比具有显着更高的响应改性因子。

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