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1、ICTIS2013©ASCE20131263AModifiedSocialForceModelunderDifferentPsychologicalConditionsforRoomEvacuation121HailinZHANG,MaojingJINandHaoLIU1NationalCenterofITSEngineeringandTechnology,ResearchInstituteofHighway,MinistryofTransport,Beijing,100088,China2TheHightechnologyresearch&Developmentcenterth
2、eministryofscience&technology,Beijing,100044,ChinaABSTRACTInthispaper,amodifiedversionoftheexistingsocialforcemodelisproposedtosimulateanevacuationprocedureinaclassroomwithdifferentpsychologicalconditions.Basedonthenumerousstudiesontheimplementationofsocialforcemodelinmodelingevacuationmotion
3、s,itisnotablethatmostofthepublishedstudiesdonottakeintoaccountthepedestrians’psychologyintheirmodels.Toreflecttheeffectsofdifferentpsychologicalconditions,wedevelopamodifiedsocialforcemodel,incorporatingastopmechanismwithvariabledistance,whichisrelatedwiththepsychologicalfactorofpedestrians.S
4、imulationexperimentispresentedforvalidatingtheproposedmodel.Atthesametime,thephenomenonthatmoreanxietycausesmorecloggingisalsoobservedinthesimulation.Theimprovementinourproposedmodelisvaluableforfurtherstudyandforupgradingthesafetyaspectsofbuildingdesigns.1.INTRODUCTIONTheimportanceofpedestri
5、ansafetyandcomfort,specificallyinurbanspaces,trafficinfrastructures,evacuationsandemergencies,isgrowing,drivenbytheeverincreasingcapacitydemandsandcomplexitiesofthebuildingenvironment.Urbanrailtransitstations,airports,sportsstadiums,largepublicandcommercialbuildings,andbigeventsaswellasshoppi
6、ngmallsorcrossingsintrafficmanagementaretypicalexamplesforthisproblem.However,crowdaccidentsstillhappensometimes.Forexample,duetothecrowdstampede,251pedestriansdiedwhentheywentonpilgrimagestoMeccainSaudiArabiaonFebruary1,2004.Hence,thesafeevacuationofpedestrianshasbecomeaninterdisciplinarytop
7、icofinterest,apointofintersectionamongdifferentscientificareas,andanissuesubjecttoincreasingthoroughresearch(Helbing,etal.2001;Korhonenetal.2001).Pedestrianevacuationisacomplexsystemcomprisedoflocalinteractionsbetweenpeopleandtheenvironment,w
