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Ultimate strength analysis of normal and high strength concrete wall panels with varying opening configurations

机译：具有不同开口配置的普通和高强度混凝土墙板的极限强度分析

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摘要

Currently the wall panel design equations given in the Australian Standard and the American Institute Code offer no guidelines for the inclusion of side restraints or openings. Empirical formulae have been derived based upon limited test data, in which only the length and location of openings are accounted for with a dimensionless parameter, α_x. In this study the nonlinear Layered Finite Element Method (LFEM) is used to undertake a comparative study to verify the effectiveness of the method in predicting the failure characteristics of seven two-way normal strength concrete walls without and with window and door openings. The ultimate loads, load-deflection responses up to failure, deflected shapes and crack patterns predicted by the LFEM are compared to the experimental observations. The method is then used to conduct three parametric studies investigating the influence of opening size, length and height on the ultimate load and deflection of twenty high strength wall panels acting in both one-way and two-way.rnComparisons of the numerical results to established formula for walls with openings validated the accuracy of the LFEM predictions. Results demonstrate that increase in opening size decreases the axial strength ratio to different degrees for one-way and two-way walls. Increasing only the opening length also significantly decreases the axial strength ratio. Increasing only the opening height has little impact on the ultimate load capacity. Walls analysed in two-way action have an increased strength compared to the one-way counterparts due to the provision of side restraints, however, such improved strength becomes small for a large sized opening. Results further confirm that increasing the opening height together with the length has the most critical effect. Hence to ensure safe design, the combined effects of increasing both the height and length of an opening should be incorporated into the ultimate load formula which is proposed in this study. The results of this study have assisted in verifying the LEFM as a reliable and effective technique for determining a relationship between ultimate load capacity and varying opening configurations so that more dependable design aids and accurate formulae can be established.
机译：目前，澳大利亚标准和美国学会代码中给出的墙板设计方程式未提供关于包括侧约束或开口的准则。基于有限的测试数据得出了经验公式，其中只有开口的长度和位置用无量纲参数α_x来说明。在这项研究中，使用非线性分层有限元方法（LFEM）进行了比较研究，以验证该方法在预测具有和没有门窗开口的七种两向法向强度混凝土墙的破坏特性方面的有效性。将极限载荷，直至失效的载荷-挠度响应，LFEM预测的挠曲形状和裂纹模式与实验观测值进行了比较。然后，该方法用于进行三项参数研究，以研究开口尺寸，长度和高度对单向和双向作用的二十块高强度墙板的极限载荷和挠度的影响。带有开口的墙的公式验证了LFEM预测的准确性。结果表明，单向和双向壁的开口尺寸的增加会在不同程度上降低轴向强度比。仅增加开口长度也显着降低了轴向强度比。仅增加开口高度对极限承载力几乎没有影响。由于提供了侧约束，因此与单向分析相比，双向分析的墙具有更高的强度，但是，这种改进的强度对于大尺寸的开口而言很小。结果进一步证实增加开口高度和长度具有最关键的作用。因此，为确保安全设计，应将增加开口的高度和长度的综合效果纳入本研究提出的最终荷载公式中。这项研究的结果有助于验证LEFM是一种可靠且有效的技术，可用于确定极限载荷能力与变化的开口结构之间的关系，从而可以建立更可靠的设计辅助工具和准确的公式。

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  • 来源
    《Engineering Structures》 |2010年第5期|p.1341-1355|共15页
  • 作者

    Hong Guan; Carlia Cooper; Dong-Jun Lee;

  • 作者单位

    Griffith School of Engineering, Griffith University Cold Coast Campus, Queensland 4222, Australia;

    Griffith School of Engineering, Griffith University Cold Coast Campus, Queensland 4222, Australia;

    Griffith School of Engineering, Griffith University Cold Coast Campus, Queensland 4222, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    axially loaded concrete wall panel; eccentric load; opening; numerical analysis;

    机译：轴向受力混凝土墙板;偏心负载开幕数值分析;

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