Joined Influences of Nonlinearity and Dilation on the Ultimate Pullout Capacity of Horizontal Shallow Plate Anchors by Energy Dissipation Method
Joined Influences of Nonlinearity and Dilation on the Ultimate Pullout Capacity of Horizontal Shallow Plate Anchors by Energy Dissipation Method
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DOI：
10.1061/(asce)gm.1943-5622.0000075
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发表时间：
2011-06
影响因子：
3.7
通讯作者：
Lian-heng Zhao;Liang Li;Feng Yang;Xiaofeng Liu
中科院分区：
文献类型：
--
作者：
Lian-heng Zhao;Liang Li;Feng Yang;Xiaofeng Liu
采用上限极限分析方法计算了水平板锚的极限抗拔承载力（UPC）和形状修正系数，对锚板上方的土体采用了非线性破坏准则和非关联流动法则的假设。考虑了三种类型的锚板，包括条形锚、圆形锚和矩形锚以及相应的破坏机制。根据虚功原理得到了锚的 breakout 系数，通过非线性序列二次规划算法进行数值实现。通过多元非线性回归方法给出了不同类型锚的形状修正系数。数值试验通过将解（非线性准则和非关联流动法则）简化为其特殊情况（线性准则和关联流动法则），证明了解的有效性，与现有研究结果吻合良好。应考虑土体的剪胀和非线性，因为它对锚板的极限抗拔承载力有显著影响。
DOI: 10.1061/(ASCE)GM.1943 - 5622.0000075. © 2011美国土木工程师协会。
CE数据库主题词：破坏；板；锚；抗拔；能量耗散。
作者关键词：非线性破坏准则；非关联流动法则；板锚；极限抗拔承载力；极限分析上限定理
The ultimate pullout capacity (UPC) and the shape modification factors of horizontal plate anchors were calculated by using upper-bound limit analysis, in which the assumptions of both a nonlinear failure criterion and the nonassociated flow rule were made upon the soil mass above the anchor plate. Three types of anchor plates, including strip anchors, circle anchors, and rectangle anchors, and the cor- responding failure mechanisms are taken into consideration. The anchor breakout factors were obtained according to the principle of virtual power, which was realized numerically by the nonlinear sequential quadratic programming algorithm. The shape modification factors for different kinds of anchors were given through a multiple nonlinear regression method. Numerical experiments demonstrate the validity of the solutions by reducing the solutions (nonlinear criterion and nonassociated flow rule) into their special cases (linear criterion and associated flow rule), which matches well with existing work. The dilation and nonlinearity of soil mass should be considered because it plays a remarkable role in the UPC of anchor plates. DOI: 10.1061/(ASCE)GM.1943-5622.0000075. © 2011 American Society of Civil Engineers. CE Database subject headings: Failures; Plates; Anchors; Pullout; Energy dissipation. Author keywords: Nonlinear failure criterion; Nonassociated flow rule; Plate anchors; Ultimate pullout capacity; Upper-bound theorem of limit analysis.