抗浮锚杆受力特性试验研究进展

随着基础埋深不断加大，建(构)筑物的抗浮问题愈加严重，抗浮锚杆在城市建设中得到了广泛应用。充分掌握抗浮锚杆的受力特性并厘清抗浮锚杆在长期荷载作用下力学性能的动态演化规律是保证抗浮结构安全、可靠的前提。为此，围绕抗浮锚杆的工作原理、应力传递机制、承载特性以及蠕变性能等方面分析和评述国内外的相关研究现状。首先从抗浮锚杆的工作原理、破坏形式出发，分别对纤维增强复合材料(fiber reinforced polymer, FRP)抗浮锚杆和钢筋抗浮锚杆应力传递机制进行讨论和对比分析；从理论计算、试验研究与数值模拟三个方面对抗浮锚杆的承载特性进行阐述；进而对抗浮锚杆处于长期荷载、循环荷载作用下的蠕变性能进行归纳总结。最后梳理了抗浮锚杆在工程应用中存在的不足，同时为非金属抗浮锚杆在侵蚀环境中的服役性能提出了研究与发展方向。

Experimental Research Progress on Bearing Characteristics of Anti-floating Anchors

With the increasing of foundation buried depth, the anti-floating problem of structures becomes more and more serious, and anti-floating anchor bolts are widely used in urban construction. It is the premise to ensure the safety and reliability of the anti-floating structure to fully grasp the mechanical properties of the anti-floating bolt and clarify the dynamic evolution law of the mechanical properties of the anti-floating bolt under long-term load. In this paper, the working principle, stress transfer mechanism, load-bearing characteristics and creep characteristics of anti-floating anchor bolts are analyzed and reviewed. Firstly, the stress transfer mechanism of FRP anti-floating bolt and steel anti-floating bolt is discussed and compared from the working principle and failure mode of anti-floating bolt. The bearing characteristics of anchor bolt are described from three aspects: theoretical calculation, experimental research and numerical simulation. Finally, the creep performance of anti-floating anchor under long-term load and cyclic load is summarized. The shortcomings of anti-floating bolt in engineering application are sorted out, and the research and development direction of anti-floating bolt in engineering construction is put forward.