發(fā)布時(shí)間：2018-05-27 22:12

  本文選題：樁基 + 豎向荷載�。� 參考：《深圳土木&建筑》2016年01期

【摘要】：本文提出了一種能考慮泊松效應(yīng)影響的彈塑性荷載傳遞模型(t-z模型)。該模型既能反映不同材料的樁基在同一土體中抗壓承載力的不同,也能反映同一材料樁基在同一土體中樁身抗壓摩阻力與抗拔摩阻力的不同,同時(shí)還具備模擬循環(huán)荷載下t-z曲線滯回特性的能力。根據(jù)位移協(xié)調(diào)算法編制了可用于豎向壓、拔荷載作用下單樁響應(yīng)分析的Matlab程序,利用程序?qū)δＰ驮囼?yàn)進(jìn)行了模擬,結(jié)果對(duì)比證明了該模型的適用性。最后分析了樁體彈性模量對(duì)壓、拔極限摩阻力比值的影響,結(jié)果表明,該比值隨彈性模量的減小而減小,對(duì)于混凝土樁,該值介于0.6~0.8之間,與規(guī)范建議的抗拔系數(shù)接近。
[Abstract]:In this paper, an elastic-plastic load transfer model is presented, which can take into account the effect of Poisson effect. The model can not only reflect the different compressive bearing capacity of pile foundation of different materials in the same soil, but also reflect the difference of compressive friction resistance and pull-out friction resistance of pile body of the same material in the same soil mass. At the same time, it has the ability to simulate the hysteresis characteristics of t-z curves under cyclic load. According to the displacement coordination algorithm, a Matlab program is developed for the analysis of the response of the pile under vertical compression and pull-out loads. The model tests are simulated by the program, and the results show that the model is applicable. Finally, the influence of the elastic modulus of the pile on the compression and the pull-out ultimate friction ratio is analyzed. The results show that the ratio decreases with the decrease of the elastic modulus, and for concrete pile, the value is between 0.6 and 0.8, which is close to the uplift coefficient suggested in the code.
【作者單位】： 深圳大學(xué)土木工程學(xué)院;中國(guó)市政工程中南設(shè)計(jì)研究總院有限公司;建設(shè)綜合勘察研究設(shè)計(jì)院有限公司;哈爾濱工業(yè)大學(xué)深圳研究生院;
【分類號(hào)】：TU473.1
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本文編號(hào)：1943989