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Primary Research on 3-D Masonry Structure Model and Realization Technology of 3-D Disaster Scene

Author: HuChangLi
Tutor: SunBaiTao
School: China Seismological Bureau, Institute of Engineering Mechanics
Course: Disaster Prevention and Reduction Engineering and Protective Engineering
Keywords: Masonry structure Earthquake Damage Three-dimensional terrain Three-dimensional model Disaster scene ArcGis
CLC: P315.9
Type: Master's thesis
Year: 2009
Downloads: 176
Quote: 5
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Abstract

The earthquake disaster emergency rescue is one of the important contents of the earthquake disaster reduction, government action is necessary to reduce casualties in the earthquake. Emergency earthquake relief is a highly professional work experience in post-disaster relief at home and abroad over the years indicate that rescue workers prior the rescue site environment, the type of building structure and structural damage morphology understand, will have an emergency earthquake relief work performance play play a very crucial role. The devastating earthquake is a small probability event, the rescue team or engineers and technicians is not always possible to experience the earthquake scene, well-known structural damage morphology and disaster scenarios. With the continuous development of virtual reality and simulation technology, the endless stream of examples of successful application of this technology in various fields, but at home and abroad in building damages visualization model and combined with the earthquake disaster scenarios that demonstrate the work of the three-dimensional terrain is not See. In China, the masonry structure is a large and wide structure, masonry structures in the earthquake's destruction is an important cause of casualties and economic losses. Therefore, to carry out the preliminary research of the the masonry structure 3D modeling and 3D disasters scene work, the use of a reasonable computer technology simulated masonry structures undermine the state and earthquake-site disaster scene, will improve the rescue team and the engineering and technical personnel rescue training earthquake disaster site scenarios targeted, so that they advance familiar to be witnessed, this has important practical significance to improve rescue efficiency, reduce casualties. Therefore, this article on how to use 3DS Max software and ArcGis software Masonry Structure Buildings 3D visualization and earthquake disaster scenes combined with three-dimensional terrain exploratory study, specific work as follows: See previous Masonry Structure Buildings combined Ms8.0 Wenchuan earthquake site visits, the masonry structure typical earthquake damage, earthquake damage position, failure modes and destruction depth, inductive analysis. According to the characteristics of seismic resistance of masonry structure analysis to investigate the seismic fortification and without differences of earthquake damage in the earthquake-proof masonry structure, high, low-intensity areas Masonry Structure Buildings differences reflect the importance of earthquake-proof. 3DS Max 3D modeling techniques, through import AutoCAD drawing, welding and Boolean operations, wall extrusion, texturing, stitching and array the completed 3D intact modeling of work, such as a rectangle, L-shaped, slotted model, sloping roof model homes, schools and other model created. Given below the middle and destroyed more serious form of larger differences Masonry Structure Buildings modeling of three-dimensional model, there are two ways. One is the texture-based method, the earthquake fracture characteristics of the masonry structure is moderate following the destruction of the main features, a combination of the damage in the earthquake disaster photos using Photoshop software to extract information and building materials, production of earthquake damage feature pictures. Adopted the the bitmap textures Law affixed to building a specific location based on typical disaster characteristics. Another is for more serious damage to the building components of the depth of the cracks, caving, collapsed damage characteristics, taken-for-destruction of components, add pieces, combined mapping method severely damaged masonry structure model. Practice has proved that the method is feasible. For Wenchuan earthquake geological disasters, causing heavy casualties and economic losses, the study using DEM data, remote sensing method of making three-dimensional terrain data is based on ArcGis9.2 software ArcScene module to lay the foundation for future geological disaster simulation work carried out after the earthquake. ArcCatalog and ArcMap module edit buildings and roads planar elements at the same time, in the three-dimensional terrain data using ArcScene module to create a three-dimensional scene building module, and proposed by the characterization of earthquake damage prediction results in the destruction level of the three-dimensional building blocks of different colors disaster scenario realization method. Finally, Shishi City, for example, describes the production steps and the feasibility of three-dimensional architectural modules disaster scene ArcScene module combined with three-dimensional terrain. Based on similarity theory, the the masonry structure three-dimensional model of the three-dimensional module replacement criteria and replace method, Shishi City, for example, preliminary ArcScene module based Shishi City 3D architectural scene and earthquake disaster scene to verify the feasibility of the method.

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