【摘要】 利用组件式GIS(COMGIS)技术来开发结合了专业震害分析模型的城市地震灾害模拟仿真系统,在VB下调用Matlab的神经网络工具箱来扩展GIS的地震灾害模拟仿真功能。研究表明:设定地震可随机输入,在系统菜单下直接调用水平成层土地震反应分析程序SHAKE91来计算出与设定震级相对应的场地土层地震动参数;实现了基于BP神经网络的震害模拟仿真模型在COMGIS系统中的模块化;系统的GIS空间分析功能可使模拟仿真结果与空间信息相匹配,实现了随机假定地震下城市潜在地震灾害的快速评估。更多还原

【Abstract】 COMGIS (Components Geography Information System) technique is adopted to develop the Virtual Reality and Simulation System for Urban Earthquake-induced Hazard by importing ANN (Artificial Neural Network) toolbox from Matlab. The research shows that: first, SHAKE91 software, a commercial program to analyze seismic response of level layered site, can be called from the system menu to simulate the site earthquake influence field under scenario earthquake, second, the virtual reality and simulation model based on BP ANN is modularized in COMGIS system, third, by GIS, the simulated results can be perfectly matched with the spatial information. Thus, the potential urban earthquake-induced hazard can also be simulated by assuming the earthquake magnitude.更多还原