摘要：
超市的应急疏散具有路线复杂、人员密度大的特点,是安全应急疏散领域需要解决的核心关键问题之一.本文基于社会力模型与A星算法建立了人员应急疏散模型,解决了社会力模型存在的人员重叠和非现实轨迹问题,研究表明,区别于SFPE(society of fire protection engineers)模式中的人员重叠现象和Steering模式中的人员绕行现象,所提出的模型符合实际的紧急疏散行为.应用本文模型对某超市 3种出口处货架、展示台平面布局进行建模分析,结果表明,货架纵向布局及布置展示台疏散时间都较横向布局短;不同布置主要影响出口区域人员密度,造成疏散效果不同.
期刊：
Geotechnical and Geological Engineering,2019年37(5):4019-4029 ISSN：0960-3182
通讯作者：
Feng, Sheng-yang(14100044@usc.edu.cn)
作者机构：
[Sheng-yang Feng; Zhi Chen] School of Environment and Safety Engineering, University of South China, Hengyang;Hunan, China;[Hong-quan Li; Li-min Wei] School of Civil Engineering, Central South University, Changsha;[Hong-quan Li; Li-min Wei; Sheng-yang Feng; Zhi Chen] Hunan, China
通讯机构：
[Sheng-yang Feng] S;School of Environment and Safety Engineering, University of South China, Hengyang, China
关键词：
Deep soft soil;Field tests;Pile;Surcharge loading
作者机构：
School of Civil Engineering, Central South University, Changsha, Chin;School of Environment and Safety Engineering, University of South China, Hengyang, China;School of Civil Engineering, Central South University, Changsha, China
关键词：
međudjelovanje odlagalište – tlo;vremenski utjecaj;elastično-viskozno-plastični model;otpor na bočno smicanje;relativni pomak između odlagališta i tla
摘要：
<jats:p>Pile-soil interaction is considered to be one of the most important problems in the study of the mechanical behaviour of pile foundation. In this paper, the lateral friction resistance and pile-soil relative displacement of bridge piles in deep soft soils are monitored for an extended period by using concrete strain gauges that are embedded in the test pile. Field test results show that both the pile lateral frictional resistance and pile-soil relative displacement increase along with time, while the pile-soil interaction demonstrates a time effect. Therefore, an elastic-viscoplastic constitutive model must be established to better simulate the time-dependent mechanical behaviour of the pile-soil contact. Based on the Goodman model, we developed an elastic-viscoplastic interface constitutive model of the pile-soil interface into the FRIC subroutine through ABAQUS software, which is one of the most commonly used finite element analysis softwares in the world, to simulate a well-recorded pile test in deep soft soils. The calculated pile lateral frictional resistance and pile-soil relative displacement are close to the measured values, and the ability of the interface model to describe the changes in the shear stress-strain of the pile-soil interface along with time is validated.</jats:p>
作者机构：
[Hong-quan Li; Li-min Wei; Sheng-yang Feng] School of Civil Engineering, Central South University, Changsha;410075, China;[Zhi Chen] School of Environment and Safety Engineering, University of South China, Hengyang;421001, China;[Hong-quan Li; Li-min Wei] 410075, China
摘要：
<jats:p>


The influence of prefabricated vertical drain (PVD)-enhancing soft soil on the adjacent bridge pile foundation is not sufficiently clear. The related studies are scarce and far behind the requirement of engineering practice. Three-dimensional finite element model (3D FEM) is established to investigate this important issue. Plastic drainage boards in the PVD are modelled by a user-defined element, which considers the axial force and permeability of the plastic drainage board, whereas its weight, shear, and torsion are not considered. The elastoplastic-consolidation coupled model is used for the soils. Field measured results of pore water pressure, ground settlement, and pile cap displacement are used to validate the 3D FEM with good accuracy. A number of useful conclusions can provide guidelines for similar projects and inform designers of the adverse effects of PVD-enhancing soft soil ground on the adjacent bridge pile foundation.


</jats:p>
