• Journal of the Korean Applied Science and Technology
• /
• v.39 no.1
• /
• pp.84-95
• /
• 2022

This study conducted a online survey (URL), DM, , E-mail, etc. were used to sample 371 people using the standard convenience sampling method, and 320 valid samples excluding 51 unfaithful respondents were analyzed by applying causality (SEM). First, the hypothesis was adopted with the influence of positive (+) on the emotional response of the human brand's goods value. Second, the hypothesis was adopted that emotional response has a positive (+) effect on consumption behavior. Third, the human brand's goods value has a positive (+) effect on consumption behavior, and the hypothesis was partially adopted. Finally, the indirect effect of emotional response in the relationship between goods value and consumption behavior was found to be statistically significant.

• Journal of the Korean Applied Science and Technology
• /
• v.38 no.6
• /
• pp.1502-1511
• /
• 2021

In order to analyze the phenomenon that occurs as the human brand domain of the golf advertising model expands, this study conducted a causal relationship (SEM) of 521 people using a mobile survey (URL) according to a sampling plan from July 1 to November 15, 2021. was applied and analyzed. First, the hypothesis was adopted with a statistically significant positive (+) effect on the fit of the human brand of the golf advertising model. Second, the hypothesis of suitability was adopted with a statistically significant positive (+) effect on purchasing behavior. Third, the human brand of the golf advertising model was hypothesized to have a statistically significant positive (+) effect on purchasing behavior. Finally, as a result of calculating the indirect effect through bootstrapping, it can be seen that the indirect effect of suitability in the relationship between human brand and purchasing behavior is statistically significant.

• Structural Engineering and Mechanics
• /
• v.50 no.6
• /
• pp.741-754
• /
• 2014

The conventional PHC pile-footing connection is the weak part because the surface area and stiffness are sharply changed. The Composite PHC pile reinforced with the transverse shear reinforcing bars and infilled-concrete, hereafter ICP pile, has been developed for improving the flexural and shear performance. This paper investigates the cyclic behavior and performance of the ICP pile-footing connection. To investigate the behavior of the connection, one PHC and two ICP specimens were manufactured and then a series of cyclic loading tests were performed. From the test results, it was found that the ICP pile-footing connection exhibited higher cyclic behavior and connection performance compared to the conventional PHC pile-footing connection in terms of ductility ratio, stiffness degradation and energy dissipation capacity.

• Structural Engineering and Mechanics
• /
• v.65 no.3
• /
• pp.343-348
• /
• 2018

This paper reports mechanical behavior of recycled fine aggregate concretes after high temperatures. It is found that compressive strength of recycled fine aggregate concretes decline significantly as the temperature rises. The elastic modulus of recycled fine aggregate concretes decreases with the increase in temperature, and the decrease is much quicker than the decrease in compressive strength. The split tensile strength of recycled fine aggregate concrete decrease as the temperature rises. Through the regression analysis, the relationship of the mechanical behavior with temperature are proposed, including the compressive behavior, elastic modulus and split tensile strength, which are fitting the test data.

• Journal of Power System Engineering
• /
• v.11 no.4
• /
• pp.92-97
• /
• 2007

This study aims at investigating the wear behavior of thermally sprayed Ni-based self-flux alloy coatings against different counterparts. Ni-based self-flux alloy powders were flame-sprayed onto a carbon steel substrate and then heat-treated at temperature of $1000^{\circ}C$. Dry sliding wear tests were performed using the sliding speeds of 0.2 and 0.8 m/s and the applied loads of 5 and 20 N. AISI 52100, $Al_2O_3$, $Si_3N_4$ and $ZrO_2$ balls were used as counterpart materials. Wear behavior of Ni-based self-flux alloy coatings against different counterparts were studied using a scanning electron microscope(SEM) and energy dispersive X-ray spectroscopy (EDX). It was revealed that wear behavior of Ni-based self-flux alloy coatings were much influenced by counterpart materials.

• Structural Engineering and Mechanics
• /
• v.12 no.4
• /
• pp.429-448
• /
• 2001

An analytical model incorporating bending and shear behavior is presented to predict the lateral loading characteristic for rectangular hollow columns. The moment-curvature relationship for the rectangular hollow sections of a column is firstly determined. Then the nonlinear lateral load-displacement relationship for the hollow column can be obtained accordingly. In this model, thirteen constitutive laws for confined concrete and five approaches to estimate the shear capacity are used. A series of tests on 12 model hollow columns aimed at the seismic shear behavior are reported, and the test data are compared to the analytical results. It is found that the analytical model reflects the experimental results rather closely.

• Structural Engineering and Mechanics
• /
• v.11 no.4
• /
• pp.393-406
• /
• 2001

The present paper discusses the behavior of the reinforced concrete beams subjected to torsion by applying the endochronic plastic model in conjunction with the softened truss model. The endochronic constitutive equations are developed to describe the behavior of concrete. The mechanical behavior of concrete is decomposed into hydrostatic part and deviatoric part. New definition of the bulk modulus and the shear modulus are defined in terms of compressive strength of concrete. Also, new deviatoric hardening function is developed. Then, the endochronic constitutive equations of concrete are applied with the softened truss model for the behavior of the reinforced concrete beams subjected to torsion. The theoretical results obtained based on the present model are compared with the experimental data. The present model has shown the ability to describe the behavior of reinforced concrete beams subjected to torsion.

• Structural Engineering and Mechanics
• /
• v.54 no.6
• /
• pp.1111-1133
• /
• 2015

Rebar corrosion in concrete is one of the main causes of reduction of service life of reinforced concrete buildings. This paper presents the influence of rebar corrosion on the structural behavior of reinforced concrete (RC) buildings subjected to strong earthquake ground motion. Different levels of rebar corrosion scenarios were applied on a typical four story RC frame. The deteriorated conditions as a result of these scenarios include loss in cross-sectional area and loss of mechanical properties of the reinforcement bars, loss in bond strength, and loss in concrete strength and its modulus of elasticity. Dynamic analyses of the frame with different corrosion scenarios are performed with selected strong earthquake ground motion records. The influences of degradation in both concrete and reinforcement on structural behavior are investigated by comparing the various parameters of the frame under different corrosion scenarios with respect to each other. The results show that the progressive deterioration of the frame due to rebar corrosion causes serious structural behavior changes such as change in failure mode. The intensity, propagation time, and extensity of rebar corrosion have very important effects on the level of degradation of steel and concrete, as well as on the earthquake behavior of the structure.

• Structural Engineering and Mechanics
• /
• v.33 no.3
• /
• pp.261-284
• /
• 2009

The seismic behavior of a framed structure with chevron-type buckling restrained braces was investigated and their behavior factors, such as overstrength, ductility, and response modification factors, were evaluated. Two types of structures, building frame systems and dual systems, with 4, 8, 12, and 16 stories were designed per the IBC 2003, the AISC LRFD and the AISC Seismic Provisions. Nonlinear static pushover analyses using two different loading patterns and incremental dynamic analysis using 20 earthquake records were carried out to compute behavior factors. Time history analyses were also conducted with another 20 earthquakes to obtain dynamic responses. According to the analysis results, the response modification factors turned out to be larger than what is proposed in the provision in low-rise structures, and a little smaller than the code-values in the medium-rise structures. The dual systems, even though designed with smaller seismic load, showed superior static and dynamic performances.

• Journal of Industrial Convergence
• /
• v.5 no.1
• /
• pp.3-21
• /
• 2007

The purpose of this study is to examine the effect of superleadership on organizational cynicism and organizational citizenship behavior. On the basis of theoretical linkages between the constructs, a conceptual model and hypotheses were established. The sample included 400 employees. Structural equation modeling(SEM) was used to employed the hypothesized relationships in the conceptual model. Results indicated that (a)superleadership has a negative impact organizational cynicism; (b)organizational cynicism has a negative impact organizational citizenship behavior; (c)superleadership has a positive impact organizational citizenship behavior. Implications for applying superleadership to organizational cynicism and organizational citizenship behavior were discussed and future research directions were outlined.