We propose and demonstrate a wireless, passive, metamaterial-based sensor that allows for remotely monitoring submicron displacements over millimeter ranges. The comprises probe made of multiple nested split ring resonators (NSRRs) in double-comb architecture coupled to an external antenna its near-field. In operation, the detects displacement structure onto which NSRR is attached by telemetrically tracking shift local frequency peaks. Owing NSRR’s near-field excitation response, highly...

In this study, we show a wireless passive sensing system embedded in reinforced concrete member successfully being employed for the measurement of relative displacement and strain simply supported beam experiment. The utilizes electromagnetic coupling between transceiver antenna located outside beam, probes placed on reinforcing bar (rebar) surface inside beam. were designed form nested split-ring resonator, metamaterial-based structure chosen its compact size high sensitivity/resolution,...

A novel passive wireless rotation sensing system with high levels of sensitivity and resolution is proposed demonstrated for measuring elastic-region bending in materials such as steel. This composed a transceiver antenna double-plate sensor the form an inter-digital configuration, which does not incorporate any active component. The exhibits large 20 μ-rad, excellent 28 MHz/° average, linear dynamic range approximately 40°. In operation, result relative between plates sensor, operating...

We report remote strain and displacement measurement during elastic plastic deformation using a metamaterial-based wireless passive sensor. The sensor is made of comb-like nested split ring resonator (NSRR) probe operating in the near-field an antenna, which functions as both transmitter receiver. NSRR fixed on standard steel reinforcing bar (rebar), its frequency response monitored telemetrically by network analyzer connected to antenna across whole stress-strain curve. This includes region...

Engineering analysis to quantify the effects of earthquake forces on structural strength components requires determining damage mode and severity components. The computations visual assessments, which are information intensive, potentially error-prone, slow. This study develops a building-information-modeling (BIM) based approach support engineering reinforced concrete structures. In proposed approach, is represented along with geometric, topological, information. Transformation reasoning...

SUMMARY Estimating axial loads on columns and structural walls at tall buildings is a complicated task because time‐dependent deformations of concrete the way building constructed affect gravity are carried by them. The accurate computation crucial for determining size strengths walls. This study investigates several analysis approaches commonly used during design such buildings. Construction sequences, longitudinal reinforcement were considered, their influences results discussed. A...

Two-story three-bay reinforced concrete frames with and without chevron brace was tested using pseudo dynamic test method. The braces were implemented to the interior span of RC frame. Chevron-braced frame observed be effective control inter-story drift demands. Based on damage state response frames, performance states discussed for different scales Duzce ground motions. results compared nonlinear time history analysis. analysis capable estimating base shear capacity displacement demands a...

In this paper, wireless sensing in the presence of complex electromagnetic media created by combinations reinforcing bars and concrete is investigated. The displacement system, primarily designed for use structural health monitoring (SHM), composed a comb-like nested split-ring resonator (NSRR) probe transceiver antenna. Although each medium scenario predicted to have detrimental effect on principle, it demonstrated that proposed sensor geometry able operate fairly well all scenarios except...

Characterization of Laser Scanners for Detecting Cracks Post-Earthquake Damage Inspection Engin Burak Anil, Burcu Akinci, James H. Garrett, Ozgur Kurc Pages 313-320 (2013 Proceedings the 30th ISARC, Montréal, Canada, ISBN 978-1-62993-294-1, ISSN 2413-5844) Abstract: Objective, accurate, and fast assessment damage to buildings after an earthquake is crucial timely remediation material losses safety occupants buildings. scanners are promising sensors collecting geometrical data regarding...

Following a disaster or an emergency situation (e.g., earthquake,) in facility, it is crucial for response teams to rapidly access navigation information of the its contents and final status facility damages vulnerable locations). However, current practice, accessing these items time-consuming accessed incomplete, since there are multiple sources that mostly disorganized. This study proposes Building Information Model (BIM) based approach integrated with sensors provide damage vulnerability...

Summary Inspired from the simplified single degree of freedom modeling approach used in preliminary design concrete gravity dams, a pseudo‐dynamic testing method was devised for seismic dam section. The test specimen 1/75 scaled section 120‐m‐high monolith Melen Dam, one highest dams to be built Turkey. idealization validated first stage study using numerical simulations including dam–reservoir interaction. Afterwards, conducted on three ground motions corresponding different hazard levels....

A two-story, three-bay RC frame with code incompliant seismic design and detailing is tested using continuous pseudodynamic test method for three scale levels of Düzce ground motion. The motion produced minimum, significant, severe damage states on the structure. Diagonal cracking infill wall, column in form cover spalling rebar buckling, complete disintegration wall were important observed events levels, respectively. Nonlinear time history analyses able to estimate story displacement...

Failures of unreinforced masonry infill walls commonly occur during seismic events. One method preventing such failures is the use externally applied mesh reinforced mortar (MRM). This paper presents a finite element (FE) modeling scheme combining smeared crack and interface elements to simulate response RC frames with hollow clay tile (HCT) HCT MRM. The models can capture cracking patterns, timing damages, force-displacement behavior frames. A study plastering overlay transformed section...

ABSTRACT Two‐story, three‐bay reinforced concrete (RC) frames with and without internal steel frame (ISF) retrofits were tested using continuous pseudo dynamic test method. The ISFs installed to the middle bay of RC frame. Test results indicated that ISF retrofit was beneficial in resisting deformation demands significant damage under simulated ground motions. shifted failure mode system from a brittle ductile mode. compared nonlinear time history analysis. analysis capable tracing overall...

The design and detailing of reinforced concrete frames is a complex process that requires intensive real-time information exchange between various tasks. monolithic behavior concrete, differences in the geometric representation structural members during analysis stages, code requirements throughout add new dimensions to problem. Additionally, especially large projects, structures are designed detailed by several engineers simultaneously. These complexities can be resolved overall quality...

Pseudodynamic testing was employed to observe the seismic performance of two retrofit methods on two-story, three-bay frame structures. The test frames had hollow clay tile (HCT) infill in central bay and incorporated deficiencies Turkish construction practice, such as use plain reinforcing bars, low-strength concrete, insufficient confining steel. Two noninvasive occupant-friendly schemes suggested Earthquake Code, namely, fiber-reinforced polymers (FRPs) precast concrete panels integrated...

Current practice of post-earthquake damage assessment is based on visual inspections by experts. Research has shown that inspection and reports produced as a result can be subjective, incomplete, vary in terms the level detail thoroughness. Critical data provides information about captured using laser scanners processed for more objective information-driven practice. In addition to information, severity identification process requires reasoning structural behavior topology. Building...

In this paper, simultaneous multi-point wireless sensing is proposed and demonstrated via multiple sensors in nested split-ring resonator (NSRR) geometry coupled to a single illuminator antenna. passive system, each probe the sensor array assigned non-overlapping spectral interval for frequency shift response local mechanical loading around unique operating resonance band of Here, it shown that antenna capable capturing responses from all probes sweep. Furthermore, inter-coupling between...