吸力式沉箱基础考虑土体流变效应的p-y曲线法
发布时间：2018-07-17 06:38
【摘要】：为了考虑土体流变效应对吸力式沉箱基础承载特性的影响,通过建立理想弹塑性p-y曲线法中土抗力系数与时间变量之间的关系,提出了一种考虑土体流变效应的吸力式沉箱基础长期性能分析方法.基于2组不同水平荷载作用下的长期模型试验,采用Matlab拟合土体参数试验数据,获得关于时间变量的理想弹塑性p-y曲线模型,并采用该方法对模型试验结果进行分析.结果表明:在长期模型试验中位移与土压力发展主要集中在试验前期,后期位移与土压力稳定需要更长时间,土体流变效应较为明显.理论计算值与实测值随时间变化规律类似,理论计算结果与试验结果相差8%左右,说明长期水平荷载下考虑时间因素的p-y曲线计算结果能较好地吻合试验值.
[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.
【作者单位】： 东南大学土木工程学院;东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家重点基础研究发展计划(973计划)资助项目(2013CB036300) 浙江省交通运输厅科研计划资助项目(2014H10)
【分类号】：P751
，
本文编号：2129434
[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.
【作者单位】： 东南大学土木工程学院;东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家重点基础研究发展计划(973计划)资助项目(2013CB036300) 浙江省交通运输厅科研计划资助项目(2014H10)
【分类号】：P751
，
本文编号：2129434
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