【摘要】：為了考慮土體流變效應(yīng)對(duì)吸力式沉箱基礎(chǔ)承載特性的影響,通過(guò)建立理想彈塑性p-y曲線法中土抗力系數(shù)與時(shí)間變量之間的關(guān)系,提出了一種考慮土體流變效應(yīng)的吸力式沉箱基礎(chǔ)長(zhǎng)期性能分析方法.基于2組不同水平荷載作用下的長(zhǎng)期模型試驗(yàn),采用Matlab擬合土體參數(shù)試驗(yàn)數(shù)據(jù),獲得關(guān)于時(shí)間變量的理想彈塑性p-y曲線模型,并采用該方法對(duì)模型試驗(yàn)結(jié)果進(jìn)行分析.結(jié)果表明:在長(zhǎng)期模型試驗(yàn)中位移與土壓力發(fā)展主要集中在試驗(yàn)前期,后期位移與土壓力穩(wěn)定需要更長(zhǎng)時(shí)間,土體流變效應(yīng)較為明顯.理論計(jì)算值與實(shí)測(cè)值隨時(shí)間變化規(guī)律類似,理論計(jì)算結(jié)果與試驗(yàn)結(jié)果相差8%左右,說(shuō)明長(zhǎng)期水平荷載下考慮時(shí)間因素的p-y曲線計(jì)算結(jié)果能較好地吻合試驗(yàn)值.
[Abstract]:In order to consider the influence of soil rheological effect on the bearing characteristics of suction caisson foundation, the relationship between soil resistance coefficient and time variable in the ideal elastoplastic p-y curve method was established. A long-term performance analysis method for suction caisson foundation considering soil rheological effect is proposed. Based on two groups of long-term model tests under different horizontal loads, an ideal elastic-plastic p-y curve model about time variables is obtained by fitting soil parameter test data with Matlab, and the results of model test are analyzed by using this method. The results show that in the long term model test, the development of displacement and earth pressure is mainly concentrated in the early stage of the test, and the stability of displacement and earth pressure takes longer in the later stage, and the rheological effect of soil is obvious. The variation law of the calculated value with time is similar to that of the measured value, and the difference between the theoretical calculation result and the experimental result is about 8%, which indicates that the calculated results of p-y curve considering time factor under long-term horizontal load are in good agreement with the experimental value.
【作者單位】： 東南大學(xué)土木工程學(xué)院;東南大學(xué)混凝土及預(yù)應(yīng)力混凝土結(jié)構(gòu)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)資助項(xiàng)目(2013CB036300) 浙江省交通運(yùn)輸廳科研計(jì)劃資助項(xiàng)目(2014H10)
【分類號(hào)】：P751
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本文編號(hào)：2129434