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In this chapter, the authors propose a system that measures microtremors of the ground, buildings, instantaneously calculates building damage estimation, emergency risk assessment. In the conventional damage estimation, emergency risk assessment due to microtremors, resonance judgments are mainly based on the initial state due to microtremors of the ground,, buildings are often seen. However, there is a possibility that the ground, the building will resonate continuously as the ground, the building are cracked, damaged by disturbances such as earthquakes, winds. In addition, the resonance causes great damage to the building. In the system proposed this time, damage estimation, emergency risk assessment are performed not only in the initial state but also during the duration. In addition, as a renovation proposal, a system is proposed that predicts the damage, emergency risk of the building during renovation with earthquake resistance, seismic isolation,, damping. In this system, the building hazard levels are classified into four categories based on two methods: one method involves calculating the response spectrum, transfer function of the building, ground using continuous microtremor measurements to determine the resonance performance,, the other method utilizes the PML (Probable Maximum Loss) values.

Perspective Chapter: Building Damage Estimation, Renovation Proposal System Using Constant Microtremor Measurement for Construction Risk Management