Development of the Rapid Safety Confirmation System of Buildings for Non-Experts

Abstract eng:
After the Great East Japan Earthquake occurred in March 2011, Tokyo metropolitan government established an ordinance in 2013 to require the business operators to prevent the employee to return home at the same time and keep them in the office when the office building maintains its safety from aftershocks. The main aim of this ordinance is to prevent the blockage of rescue and fire-fighting activities by the traffic jam induced by the commuters heading their homes at the same time. It has been said that probability of occurrence of Tokyo metropolitan earthquake within 30 years is about 70% in Tokyo metropolitan area. The damage of buildings by the earthquake is predicted to be more than several million. However, there are not enough building experts who are capable of confirming the building’s structural safety after the earthquake. For the purpose of resolving the problem, we have developed the rapid safety inspection system of buildings for non-experts. The system supports building manager with no expertise on structural safety to judge the structural safety of a building just after earthquake occurrence. This system consists of the “judgment of the extent of damage with measurement”, which is to measure the seismic intensity and the amount of story drift of a building with the measuring instruments, that is seismometer and simple story drift recorder KEGAKI, installed to a building, and the “judgment of the extent of damage by visual inspection”, which is for the non-expert to check damages after the earthquake using the inspection list created by the experts in advance. Rapid Safety Inspection, Measuring of building damage, KEGAKI system, Visual inspection, Non-experts

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