Study of a New Method to Compute the Performance Curve of Real Structures With Acceleration Sensors

Abstract

This paper shows a new method of the double integral with Wavelet Transformation to compute the response displacement of the building from the measured acceleration. This method provides the performance curve of the building that suffered an earthquake and enables us to judge the damage of the building quickly after the earthquake. We discussed the usefulness of this new method through the past experimental data of the shaking table test of R/C columns in this paper.

EARTHQUAKE DAMAGE EVALUATION OF AN 8-STORY STEEL-REINFORCED CONCRETE BUILDING USING Sa-Sd CURVES

“…The effectiveness of the curve approach to assessing the damage caused by large structural deformations has been confirmed in a shaking table test. The measured performance curve largely agreed with the computed curve calculated using WTT 10) . In contrast to traditional dynamic characteristics-based methods, the curve method was found to be able to detect changes in the fundamental frequency from small responses to the maximum response and to identify the seismic capacity points of the measured building.…”

A new method for evaluating the real‐time residual seismic capacity of existing structures using accelerometers: Structures with multiple degrees of freedom

“…10 The first mode can be extracted from the measured response using the WT by considering the ranks of those frequency bands that contain the predominant frequency of the building 20 ; such ranks are referred to here as "predominant ranks" and are discussed in detail in Section 5.2.…”

“…10. We describe here the method for calculating the restoring force and displacement at each corner point, but the details are available in Ref.…”

“…We describe here the method for calculating the restoring force and displacement at each corner point, but the details are available in Ref. 10. The schematic of the modeling process is shown in Figure 5, and the procedures are as follows, where…”

“…[9][10][11] This system allows the level of damage to a building to be communicated to its owners and residents immediately after an earthquake. It is relatively easy to implement because the building in question need only be instrumented with in situ sensors and a server and need not be modeled on a computer.…”