US 10,648,881 B2 · Seismic response assessment of man-made structures

Abstract

The present disclosure is drawn to methods and systems for determining a seismic response of a man-made structure to a given input earthquake. Sensors are used to obtain vibration data for data collection locations from one or more floors of the man-made structure, which may be ambient vibration data or vibration data resulting from forced vibration or shock testing. The vibration data is used to determine modal characteristics for the man-made structure, including mode shapes, natural frequencies, and damping ratios. The mass, centre-of-mass, and moment of inertia is also determined for the floors of the man-made structure. The modal characteristics are then translated from the data collection locations to the centre-of-mass based on the structure of the floors. Then, a seismic response of the man-made structure to an input earthquake is determined using the translated modal characteristics and the mass and moment of inertia of the floors.

Claims18

Dependent claims

A method, comprising:

obtaining vibration data from sensors for at least one floor of a man-made structure, the vibration data indicative of ambient vibration levels at data collection locations of the man-made structure;
determining modal characteristics for the data collection locations of the at least one floor based on the vibration data;
determining a mass, a centre-of-mass location, and a moment of inertia of the at least one floor;
translating the modal characteristics from the data collection locations to the centre-of-mass location based on a floor structure of the at least one floor;
determining a seismic response of the man-made structure to an input earthquake using the translated modal characteristics, the mass, and the moment of inertia of the at least one floor;
and
associating a level of destruction to the man-made structure as a result of the input earthquake based on the seismic response.

4 more elements

A system, comprising:

a processing unit;
and
a memory communicatively coupled to the processing unit and comprising computer-readable program instructions executable by the processing unit for:
obtaining vibration data from sensors for at least one floor of a man-made structure, the vibration data indicative of ambient vibration levels at data collection locations of the man-made structure;
determining modal characteristics for the data collection locations of the at least one floor based on the vibration data;
determining a mass, a centre-of-mass location, and a moment of inertia of the at least one floor;
translating the modal characteristics from the data collection locations to the centre-of-mass location based on a floor structure of the at least one floor;
determining a seismic response of the man-made structure to an input earthquake using the translated modal characteristics, the mass, and the moment of inertia of the at least one floor;
and
associating a level of destruction to the man-made structure as a result of the input earthquake based on the seismic response.

7 more elements

Dependencies are inferred from the claim text.

Seismic response assessment of man-made structures

Life of this patent

Seismic response assessment of man-made structures

Life of this patent

Abstract

Claims18