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In-plane performance of nonstructural partition wall systems under cyclic load conditions.

机译：非结构隔墙系统在循环载荷条件下的平面内性能。

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摘要

The objective of this research is to develop better understanding of the seismic behavior of nonstructural partition walls, and to improve their performance by utilizing a low cost damping system technique. The purpose of the proposed damping system is to minimize the repair costs in case of earthquake occurrence. This study describes an experimental program coupled with analytical investigation to modify the design and practice procedures of partition walls as specified by today's building code. The experimental program consists of testing nine full scale partition walls of 48.0 inch long and 96.0 inch high. The specimens were constructed using light gauge steel studs (18 gauge steel), the walls were sheathed on both sides with 5/8 inch gypsum boards (GB). Three design variables were used in the experimental work, these variables were; partition walls without damping systems, partitions with single damping device and partitions with double damping devices. In order to have a base for comparison, three specimens were tested with single-damping system (SDS), three specimens were tested with double-damping system (DDS) and three specimens were tested with no-damping system (NDS). The number of experimental specimens was chosen to allow for good assessment of the effectiveness of the systems used. The wall specimens were subjected to in-plane horizontal cyclic loading for drifts ranging from 0.25 inch to 2.75 inches (0.3% to 3% drifts of the wall height) in 0.25 inch increments. Test results included cyclic hysteresis and envelope curves of load-displacement relationships, the degree of damages and failure modes as defined by photographs taken during and after testing. Based on cyclic loading envelope curves; peak loads, capacity factors, dissipated energy and energy loss by damping systems and their corresponding drifts were determined. Further, comparison of the peak points envelopes for NDS, SDS and DDS damping specimens provided a vital understanding of the relative drift capacities of the walls. The ductility factor which measures the wall stability was also determined. Damages and failure modes were noted through visual inspection and photographs were taken during and after testing. The test results revealed that although damping does not significantly influence load capacity, it increased the failure drift for SDS and DDS by 33% and 67% respectively over NDS. Also, ductility factors increased about 38% for SDS and 68% for DDS over NDS, the cumulative dissipated energy increased 112% for SDS and 137% for DDS over NDS. The study showed that the energy loss was greater by about 33% for SDS and 106% for DDS in comparison to NDS. The research was extended to develop an empirical equation to predict the degree of damage in partitions with damping systems based on the numerical prediction of the energy loss. The proposed equation shows a good prediction of degree of damages when it is compared to the testing results performed in this project.
机译：这项研究的目的是更好地了解非结构性隔墙的抗震性能，并通过使用低成本的阻尼系统技术来提高其性能。所提出的阻尼系统的目的是在发生地震的情况下使维修成本最小化。这项研究描述了一个实验程序以及分析调查，以按照当今的建筑法规的规定修改隔墙的设计和实践程序。实验程序包括测试9个长为48.0英寸，高为96.0英寸的全尺寸隔墙。使用轻型钢制双头螺栓（18型钢）构建标本，墙壁的两侧均用5/8英寸的石膏板（GB）覆盖。实验工作中使用了三个设计变量，分别是：不带阻尼系统的隔墙，带单个阻尼装置的隔板和带双阻尼装置的隔板。为了有一个比较的基础，使用单阻尼系统（SDS）测试了三个样本，使用双阻尼系统（DDS）测试了三个样本，使用非阻尼系统（NDS）了测试了三个样本。选择实验样本的数量是为了对所使用系统的有效性进行良好的评估。壁标本承受0.25英寸至2.75英寸的漂移（壁高的0.3％至3％的漂移），以0.25英寸为增量进行面内水平循环加载。测试结果包括循环磁滞和载荷-位移关系的包络线，损坏程度和破坏模式，这些由测试期间和测试后拍摄的照片确定。基于循环荷载包络曲线；确定了峰值载荷，容量系数，耗能和阻尼系统的能量损失及其相应的漂移。此外，比较NDS，SDS和DDS阻尼样品的峰值包络，可以对壁的相对漂移能力有一个至关重要的了解。还确定了测量壁稳定性的延性因子。通过目视检查记录损坏和故障模式，并在测试期间和之后拍照。测试结果表明，尽管阻尼不会显着影响负载能力，但与NDS相比，SDS和DDS的故障漂移分别增加了33％和67％。此外，SDS的延性因子比NDS增加了约38％，DDS的68％，SDS的累积耗散能量增加了，而NDS的DDS的累积耗散能量增加了137％。研究表明，与NDS相比，SDS的能量损失大了约33％，DDS的能量损失大了106％。扩展了研究以建立经验方程，以基于能量损失的数值预测来预测带有阻尼系统的隔板的破坏程度。与本项目中执行的测试结果相比，所提出的方程式可以很好地预测损坏程度。

著录项

  • 作者

    Amer, Salah M.;

  • 作者单位

    North Carolina Agricultural and Technical State University.;

  • 授予单位 North Carolina Agricultural and Technical State University.;
  • 学科 Engineering.;Civil engineering.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 159 p.
  • 总页数 159
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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