超高层建筑复合桩基承载力可靠度仿真分析
Simulation Analysis of Reliability of Bearing Capacity of Composite Pile Foundation in Super High-Rise Buildings
张树珺 1徐志军2
作者信息
- 1. 南阳理工学院土木工程学院,河南 南阳 473004
- 2. 河南工业大学土木工程学院,河南 郑州 450001
- 折叠
摘要
为提高超高层建筑的安全性,提出一种超高层建筑复合桩基承载力可靠度仿真分析方法.建立函数关系式,分别计算柔性桩和刚性桩的极限承载力,分析桩侧摩擦力、桩端阻力以及桩长变化参数对承载力的影响;考虑超高层建筑安全系数和土层性质,利用恒载、活载指标评估复合桩基的荷载效应,建立随机变量计算模型获得不同可靠度指标的标准差,在融合各参数指标下完成对复合桩基承载力可靠度的最终计算.经仿真证明,所提计算方法得到的计算值与实际测量值非常接近,说明该方法的分析结果准确度较高,具有一定的应用价值.
Abstract
In order to improve the safety of super high-rise buildings,a reliability simulation method for the bear-ing capacity of composite pile foundation in super high-rise buildings was put forward.Firstly,functional relationships were established.And the ultimate bearing capacity of flexible and rigid piles were calculated respectively.Then,the influence of friction at the pile side,resistance at the pile end,and variation parameters of pile length on the bearing capacity were analyzed.After considering the safety factor of super high-rise buildings and soil properties,we evalua-ted the load effect of composite pile foundation by using dead load and live load indicators.Furthermore,a model of random variable was built to calculate the standard deviation of different reliability indicators.Finally,based on various parameters,the calculation for the reliability of bearing capacity of composite pile foundation was completed.The simulation results show that the values obtained by the proposed method are very close to the actual values,indi-cating that the accuracy of analysis result of the method is relatively high.
关键词
复合桩基/承载力分析/可靠度计算/承载特性/可靠度标准差Key words
Composite pile foundation/Bearing capacity analysis/Reliability calculation/Load-bearing character-istics/Standard deviation of reliability引用本文复制引用
基金项目
2022年度南阳理工学院博士科研启动基金项目(NGBJ-2022-20)
出版年
2024
NETL
NSTL
万方数据