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

作　　者：张树珺[1] 徐志军[2] ZHANG Shu-jun;XU Zhi-jun(School of Civil Engineering,Nanyang Institute of Technology,Nanyang Henan 473004,China;College of Civil Engineering,Henan University of Technology,Zhengzhou Henan 450001,China)

机构地区：[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

出　　处：《计算机仿真》2024年第9期330-334,共5页Computer Simulation

基　　金：2022年度南阳理工学院博士科研启动基金项目(NGBJ-2022-20)。

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。In order to improve the safety of super high-rise buildings,a reliability simulation method for the bearing 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 evaluated 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,indicating 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 

分 类 号：TP399[自动化与计算机技术—计算机应用技术]