Seismic Performance of Beam-Column Subassemblies with High-Strength Steel Reinforcement

Chang, Barbara; Hutchinson, Tara C.; Wang, Xiang; Englekirk, Robert E.

doi:10.14359/51686997

Cited by 22 publications

(7 citation statements)

References 7 publications

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“…The first term of the Equation ( 26) determines the separability of distribution by considering the difference in covariance matrices, whereas the second term deals with difference in the mean of distribution. The second term of the Equation ( 26) is same as the Mahalanobis distance (MD) as represented in Equation (24). The Bhattacharyya distance (BD) has an additional term that considers the dissimilarity in the standard deviations.…”

Section: Bhattacharyya Distance (Bd)mentioning

confidence: 99%

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Adaptive Autoregressive Modelling Based Structural Health Monitoring of RC Beam-Column Joint Subjected to Shock Loading

Rajeev

Pamwani

Ojha

et al. 2022

Structural Health Monitoring

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In the present work, a novel technique based on the combination of singular spectral analysis (SSA) and recursive estimate of coefficients of adaptive autoregressive (AR) modelling is employed to identify the damage in the reinforced (RC) beam-column joints. The damage is induced by imparting shock load at the tip of the beam-column joints. The damage is identified with the help of the acceleration response of the healthy and damaged specimens excited by high intensity white noise. The proposed approach has two major components, first, filtering and removing the noise from the dynamic response using the singular spectral analysis and second, modelling the filtered response using adaptive AR process to get the recursive estimate of coefficient matrix for baseline and damage states. The coefficients evaluated for each time instant are presented in a multi-dimensional subspace to form distinct clusters corresponding to a healthy and damaged state. In order to identify and quantify the damage, the geometrical and statistical measures are evaluated that quantifies the segregation of clusters. In total, three distinct measures are used to quantify the damage, namely, Euclidean distance (ED), Mahalanobis distance (MD) and Bhattacharyya distance (BD). The BD accounts the variation in the distribution of both the clusters, thereby shows superior results comparatively than ED and MD. The results of DSFs also manifest the superiority of BD over the other two DSFs. These geometrical and statistical distances are the damage sensitive feature (DSF) to identify and quantify the damage in the specimen due to the shock load. The obtained results of all the DSFs show good consistency with the maximum deformation of the specimen due to shock loading highlighting the accuracy of the proposed algorithm.

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Section: Bhattacharyya Distance (Bd)mentioning

confidence: 99%

“…However, a few damage indexes can be found in the literature. [23][24][25][26] Therefore, the capability to identify and quantify the damage of the crucial structural assembly, that is, beam-column joint subjected to extreme loads, will be of great interest for the evaluation of structural endurance after an attack.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Autoregressive Modelling Based Structural Health Monitoring of RC Beam-Column Joint Subjected to Shock Loading

Rajeev

Pamwani

Ojha

et al. 2022

Structural Health Monitoring

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“…To verify the validity of obtained parameters, the nonlinear fiber‐based material models were established by “OpenSees.” The “Reinforcing Steel” material and “Displacement‐Based Beam‐Column” element were adopted, which can take the low‐cycle fatigue behavior into account . The relevant parameters ( f y , f u , E s , E sh , C f , C d , α , etc.)…”

Section: Low‐cycle Fatigue Test On Hrb400 Rebarmentioning

confidence: 99%

Fatigue damage analysis of reinforced concrete column considering low‐cycle behavior of HRB400 steel

Xiao

Zhang

et al. 2019

Structural Design Tall Build

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In this study, a damage model-based fatigue behavior is proposed. To consider the fatigue behavior of steel in the damage model, the experimental research on reinforcing steel bar grades HRB400 was presented. The monotonic tension test and lowcycle fatigue test were carried out. The plastic strain amplitude-fatigue cycle (ε p -2N f ) curve and plastic strain amplitude-strength loss factor (ε p -ϕ SR ) curve were obtained. The fatigue parameters (C f , C d , and α) were proposed by nonlinear fitting.The specimens were simulated using the "Reinforcing Steel" material in "OpenSees"program. These fatigue parameters were proved to accurately describe the fatigue behavior of HRB400 rebar. Moreover, to verify the application of fatigue damage model in RC column, fiber-based element models were established based on the quasi-static cyclic test on RC columns. The calculated results agreed well with those of the tests. The damage degree of RC column was calculated by the recorded stressstrain curves of material. The proposed fatigue parameters could be referred in damage model based on material fatigue behavior. KEYWORDS damage index, low-cycle fatigue, numerical analysis, reinforcing steel bar, seismic behaviorThe current reinforced concrete (RC) structures such as bridge, crane beam, and high-rise buildings bear not only the static loading but also cyclic loading . [1,2] Structures experience deformations beyond the yielding stage in long-term situation. [3] This may lead to brittle failure characterized by insufficient utilization of material strength. [4,5] For taking full advantages of material mechanical properties in structural design, reliable methods to predict fatigue damage are recommend.Recently, various damage models for appraising structural performance state have been proposed. [6][7][8][9] Park-Ang gave the classical doubleparameter model, which depended on both of maximum deformation and hysteretic energy. [10] This model considered the interaction between accumulated damage and structural response. Guo et al. [11] extended the application of Park-Ang model to three-dimensional case; it was reliable in evaluating the damage under coupling of axial loading and bidirectional bending. Fu and Liu [12] took various displacement amplitudes and load sequence into account, whereas effective energy dissipation factor and load sequence factor were introduced. These works attempted to precisely quantify the damage degree. After that, the fatigue of material was found to influence damage degree, as the accumulated hysteretic energy and inelastic deformation resulted in the change of material mechanical properties. [13] Castillo et al. [14] generalized the Weibull model for predicting fatigue behavior at any stress level. The fatigue life of structure can be estimated by these fatigue damage model.It was concluded that the fatigue performance of structure was directly influenced by the fatigue behavior of reinforcement. [15] Zanuy et al. [16] conducted the fatigue test on RC box-girder bridges. The relationship between...

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“…This structure has been analyzed by Englekirk (2002) and applied to famous buildings, including the Highland Center in Hollywood and the Paramount apartment in San Francisco. Bara Chang et al (2012Chang et al ( , 2014 tested full-scale and scaled specimens of frames with DDC. The results confirmed that the connections with the DDC had a stable energy-dissipation capacity and that the seismic performance of the DDC frames was better than that of conventional frames.…”

Section: Introductionmentioning

confidence: 99%

A novel precast concrete beam-to-column connection with replaceable energy-dissipation connector: Experimental investigation and theoretical analysis

Tong

2021

Bull Earthquake Eng

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In order to avoid the damage of the connection due to the overstrength of beam strength, and the alternation of the strength hierarchy in the structural system. The additional bending moment produced by the combined action of the pressure generated by the concrete compression zone and the tension generated by the reinforcements needs to be reduced. A novel precast concrete beam-column connection is proposed herein. In the proposed connection, the precast beam is laid on a steel corbel embedded in the precast column. A novel replaceable energydissipation connector (REDC) is placed at the bottom of the steel corbel, which ensures that it is in the same horizontal position aligned with the longitudinal reinforcement at the bottom of the connection. In addition, there is a narrow vertical slot adjacent to the column face. The total yield capacity of the top reinforcement is larger than that of the bottom REDC energy-dissipation connector. Theory study focused on the structural features and mechanical mechanism of this novel precast connection. Three low-cycle quasi-static loading tests were carried out on a single full-2 scaled specimen by replacing three REDCs with different sizes. The cracking pattern of this novel precast connection, and the effects of different parameters of the REDCs on the energy-dissipation capacity and load capacity of the connections were discussed. By performing a finite-element simulation, a method for reducing the additional bending moment and keeping the top reinforcements always in elastic was developed. In addition, the relevant design suggestions were provided. The conclusion shows that the seismic performance of this novel precast concrete beamcolumn connection is excellent. The positive and negative bending moments of novel precast concrete beam-column connection both reduce the additional bending moment. In view of this, the bending moment of the novel connection is a controllable variable.

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Seismic Performance of Beam-Column Subassemblies with High-Strength Steel Reinforcement

Cited by 22 publications

References 7 publications

Adaptive Autoregressive Modelling Based Structural Health Monitoring of RC Beam-Column Joint Subjected to Shock Loading

Adaptive Autoregressive Modelling Based Structural Health Monitoring of RC Beam-Column Joint Subjected to Shock Loading

Fatigue damage analysis of reinforced concrete column considering low‐cycle behavior of HRB400 steel

A novel precast concrete beam-to-column connection with replaceable energy-dissipation connector: Experimental investigation and theoretical analysis

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