Damage Identification of a Three-Story Infilled RC Frame Tested on the UCSD-NEES Shake Table

Structural health monitoring of RC structures under seismic loads has recently attracted attention in the earthquake engineering research. In this paper, a piezoceramic-based device called “smart aggregate” was used for the health monitoring of RC frame structures under earthquake excitations. A two-story one-bay RC moment frame instrumented with smart aggregates was tested using a shake table. The distributed piezoceramic-based smart aggregates embedded in the RC structures were used to monitor the health condition of the structures during the tests. The sensitiveness and effectiveness of the proposed piezoceramic-based approach were investigated and evaluated by analyzing the measured responses.

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Shake table tests on a non-seismically detailed RC frame structure

STRUCTURAL ENGINEERING AND MECHANICS ◽

10.12989/sem.2012.41.1.001 ◽

2012 ◽

Vol 41 (1) ◽

pp. 1-24 ◽

Cited By ~ 15

Author(s):

Akanshu Sharma ◽

G.R. Reddy ◽

K.K. Vaze

Keyword(s):

Frame Structure ◽

Shake Table ◽

Rc Frame ◽

Shake Table Tests ◽

Rc Frame Structure

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Non-Model Approach Based Damage Detection in RC Frame with Masonry Infill

Proceedings ◽

10.3390/ecsa-5-05860 ◽

2018 ◽

Vol 4 (1) ◽

pp. 56

Author(s):

Himakshi Bhatia ◽

Ajay Chourasia ◽

Shilpa Pal

Keyword(s):

Damage Detection ◽

Damage Identification ◽

Response Spectra ◽

Mode Shapes ◽

Rc Frame ◽

Scaled Model ◽

Masonry Infill ◽

Building Research Institute ◽

Time Histories ◽

Modal Curvature

The paper focuses on real-time damage detection based on vibration studies carried out by the Central Building Research Institute (CBRI) structural health monitoring team. The experiment was performed on a 1:3 scaled model of a six- story reinforced concrete (RC) frame with masonry infill in the building dynamics laboratory of CBRI. The forward problem is attended by inducing step-by-step damage in infill to investigate the changes in dynamic response as a result of changes in the physical properties of the structure. Recorded time histories are processed for frequency response spectra (FRS) with fast fourier transform (FFT) and mode shapes are obtained. Changes in natural frequency and modal curvature for each of the five damage cases are analysed for damage detection and location in the structure. An algorithm for damage identification viz. curvature damage factor (CDF) approach is presented.

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Shake table experimental verification for a structural damage identification technique

World Forum on Smart Materials and Smart Structures Technology ◽

10.1201/9781439828441.ch248 ◽

2008 ◽

Author(s):

Shinya Wu ◽

Li Zhoum ◽

Jann Yang

Keyword(s):

Experimental Verification ◽

Structural Damage ◽

Damage Identification ◽

Shake Table ◽

Structural Damage Identification ◽

Identification Technique

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Study on the Damage Detection of RC Frame Beams Based on the Vibration Mode Slope Change Rate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.2868 ◽

2010 ◽

Vol 163-167 ◽

pp. 2868-2872

Author(s):

Gang Xue ◽

Feng Ge Li

Keyword(s):

Vibration Mode ◽

Damage Identification ◽

Dynamic Test ◽

Differential Method ◽

Dynamic Monitoring ◽

Rc Frame ◽

Load Step ◽

Change Rate ◽

Slope Change ◽

Relative Change

Based on the mechanism of the relative change rate of mode shape (RD), a new damage identification quantity called the vibration mode slope change rate (RD’) is proposed. The new quantity is analyzed with the fundamental principles of function differential method. Dynamic test is carried on 5 RC frame beams, which are subjected to an increasing static load in the middle to introduce cracks. After each load step, unloading, and an experimental dynamic monitoring is performed on the beam, then reloading to the next step. Modal analysis is carried out on frame beams under each load step, and modal displacements are given, the vibration mode slope change rate graphs of the RC beams are calculated, which can be used to detect multiple-damages. By means of SAP2000, the comparison analyses between RD and RD’ indicate that RD’ can effectively avoid the careless judges and misjudge in the damage identification of frame beams.

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