• Journal of the Earthquake Engineering Society of Korea
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• v.1 no.3
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• pp.37-44
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• 1997

In this paper, the inelastic behavior of an asymmetric tall building is investigated. The asymmetry in rigidity caused by the structural asymmetry induces torsional as well as lateral deformation. The inelastic analysis of such an asymmetric structure is difficult to carry out with a planar model and thus requires a full three dimensional model. In this paper a 102 story unsymmetric tall building is analized by static push-over procedure and its behavior is investigated. The analysis are performed with and without floor rotation to compare the results. According to the results the static behavior of the model building, as expected, turned out to be dependent heavily an the asymmetry of the plan shapes of the building.

• Smart Structures and Systems
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• v.15 no.6
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• pp.1439-1461
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• 2015

Design criteria, modeling rules, and analysis principles of seismic isolation systems have already found place in important building codes and standards such as the Uniform Building Code and ASCE/SEI 7-05. Although real behaviors of isolation systems composed of high damping or lead rubber bearings are nonlinear, equivalent linear models can be obtained using effective stiffness and damping which makes use of linear seismic analysis methods for seismic-isolated buildings possible. However, equivalent linear modeling and analysis may lead to errors in seismic response terms of multi-story buildings and thus need to be assessed comprehensively. This study investigates the accuracy of equivalent linear modeling via numerical experiments conducted on generic five-story three dimensional seismic-isolated buildings. A wide range of nonlinear isolation systems with different characteristics and their equivalent linear counterparts are subjected to historical earthquakes and isolation system displacements, top floor accelerations, story drifts, base shears, and torsional base moments are compared. Relations between the accuracy of the estimates of peak structural responses from equivalent linear models and typical characteristics of nonlinear isolation systems including effective period, rigid-body mode period, effective viscous damping ratio, and post-yield to pre-yield stiffness ratio are established. Influence of biaxial interaction and plan eccentricity are also examined.

• The Journal of the Acoustical Society of Korea
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• v.42 no.6
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• pp.565-571
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• 2023

With the introduction of the post-verification system, the measurement of floor impact noise performance on-site has become mandatory, and the evaluation method has changed. To track the performance changes since the policy implementation, research is needed on how the characteristics of heavyweight impact sound change according to the varied evaluation method. In this study, we analyzed the contribution rate of the frequency band-specific sound pressure level on the single-number quantity for a multi-family housing unit with the same floor plan and floor structure, comprising 59 households, based on the changed impact sources and evaluation indicators. It is difficult to compare simply because the method of calculating contributions by frequency band according to the single-day evaluation is different, but the average contribution rate of 63 Hz was 80.8 % in the evaluation method before the introduction of the post-confirmation system (Tire measurement and evaluated as L'_i,Fmax,AW), and the average contribution rate of 125 Hz was 19.2 %. The current evaluation method (rubber ball measurement and evaluation as L'_iA,Fmax) shows that the contribution rate has decreased to 33.1 % on average at 50 Hz ~ 80 Hz, 58.7 % on average at 100 Hz ~ 160 Hz, 6.9 % on average at 200 Hz ~ 315 Hz, and 1.3 % on average at 400 Hz ~ 630 Hz. This result is a case analysis for the target apartment house, and it is necessary to analyze measurement data for more diverse apartment houses.

• Journal of the Korean Association of Geographic Information Studies
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• v.19 no.4
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• pp.157-168
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• 2016

Change of Zoning Regulations in district unit plans calls for improving development benefits through upzoning rather than harmonious worldwide development. The purpose of this study is to examine the floor area ratio incentive system according to un-zoning in district units plan, and to suggest criteria to secure publicness. In order to derive methods to secure district unit plan publicness in Busan Metropolitan City, the ratio of securing public facilities through upzoning was examined. A comparative analysis of land price rate in the entire city versus the use district suggests that it is possible to secure 10 to 15% of public facilities. In this study, 10% of the project site was applied to secure public facilities, and it produced upgraded publicness.

• Journal of the Korean Institute of Rural Architecture
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• v.14 no.4
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• pp.55-65
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• 2012

Urban traditional housing is a type of the urban housing which have developed by itself from the traditional vernacular houses and it has continued with a traditional feature in the westernization and modernization affection of Korea. Also, the urban traditional housing is still one of the housing in the present and it makes a urban village with a rich culture benefit and fresh natural environment. The purpose of this study is to analyze the periodical characteristics of urban traditional house in korea's provincial town Gyeongju. The local range is Hwang-Nam Hanok Conservation Area in Gyeongju and the period range is 1874~2000s. So the first period from 1874 to 1909, the second period is 1910 to 1945, the third period is 1946 to 1969, the fourth period is 1970s, and the fifth period is since the 1980s. This classification will be considered of the social phenomenon at the time. The total number of target houses are 8 houses. They were analyzed by layout, floor plan, and elevation characteristics of urban traditional house. For structure of this study, Chapter 1, establishes the goal and range of study. Chapter 2, 3, examines distinctions of urban traditional house with traditional house, and meaning of urban traditional house, and transition of urban traditional house. Chapter 4, establishes formality to analysis, and performed from plan to elevation analysis, observation survey, and interview through door-to-door survey, and clarifies trend and characteristic of urban traditional house's change by integrating the results, and Chapter 5, is results integrating the above studies.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.7
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• pp.548-553
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• 2017

The aim of this study was to develop a low impact development design technique that can be applied in the land use planning stage and verify quantitatively the effects of non-point pollution reduction. For this purpose, the low impact development design elements that can be applied in the land use planning stage were derived and applied to an actual site, and the non-point pollution reduction effect was analyzed using the LIDMOD2 program. The analysis showed that the permeability rate of the land use plan using low impact development decreased by 19.8% compared to the existing land use plan. In addition, annual surface runoff decreased by 19.0% and annual infiltration increased by 164.1%. In the case of non-point pollution, the annual loading, T-N, T-P, and BOD decreased by 18.7 ~ 22.8%. Therefore, compared to the existing land use plan, the land use plan using low impact development has a considerably large effect of reducing the non-point pollution without changing the floor area according to each application. Therefore, to maximize the reduction effect of non-point pollution, it will be necessary to establish a related plan by applying the low impact development technique from the land use planning stage to the existing LID facility-oriented plan.

• Journal of the Korean housing association
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• v.22 no.5
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• pp.59-69
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• 2011

The purpose of the study was to perform the post-occupancy evaluation of housing environments of Jangyou New Town in Gimhae. The data for the analysis was collected through questionnaire survey method from August 10 to 27, 2010, and the sample consisted of 524 respondents living in apartment complexes in Jangyou. The features of housing environment were categorized into unit housing, apartment complex, and neighborhood and total 28 specific items were included in the evaluation. The data were analyzed using descriptive statistics and analysis of variance with Duncan's multiple range tests. The results were as follows: 1) Overall evaluation of housing environment of the residents in Jangyou were relatively high, expecially in floor plan layout of unit housing, self-expression through apartment complex, and natural environment of neighborhood. 2) The demographic and housing variables that had significant influences on the post-occupancy evaluation were age of the respondent, monthly income, apartment size and tenure type of apartment. Respondents who were over sixty years old, with monthly income of less than 2,000,000 won, or living in public rental apartments were more likely to evaluate overall housing environment positively than rest of the respondents.

• International Journal of High-Rise Buildings
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• v.5 no.1
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• pp.1-12
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• 2016

The 1100 foot [335 m] tall Wilshire Grand Center tower under construction in Los Angeles illustrates many key outrigger issues. The tower has a long, narrow floor plan and slender central core. Outrigger braces at three groups of levels in the tower help provide for occupant comfort during windy conditions as well as safety during earthquakes. Because outrigger systems are outside the scope of prescriptive code provisions, Performance Based Design (PBD) using Nonlinear Response History Analysis (NRHA) demonstrated acceptability to the Los Angeles building department and its peer review panel. Buckling Restrained Brace (BRB) diagonals are used at all outrigger levels to provide stable cyclic nonlinear behavior and to limit forces generated at columns, connections and core walls. Each diagonal at the lowest set of outriggers includes four individual BRBs to provide exceptional capacities. The middle outriggers have an unusual 'X-braced Vierendeel' configuration to provide clear hotel corridors. The top outriggers are pre-loaded by jacks to address long-term differential shortening between the concrete core and concrete-filled steel perimeter box columns. The outrigger connection details are complex in order to handle large forces and deformations, but were developed with contractor input to enable practical construction.

• Journal of the Korean housing association
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• v.16 no.6
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• pp.9-19
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• 2005

It is possible to explain the design, the meaning, and the use of domestic space by comparing different cultures. The characteristics of Koreans' housing life living in western cultures has already been studied extensively. Because of political reasons, however, the characteristics of Koreans' housing life living in Chinese culture has hardly been studied at all. The purpose of this study was to find out the characteristics of succession and transformation of domestic housing culture. The data was collected by questionnaire methods from fifty Korean households and eleven Chinese households. Individual interviews and actual surveys, including taking pictures were also used for data collection. The results of this study were as follows (1)An analysis of heating system usage behaviors showed the importance of heated floors, known as Ondol, is one of the enduring characteristics of domestic habits. (2)In the sitting style, the traditional sitting on the floor was shown in living room. (3)Regarding room usage behavior, Korean households were centered around the living room in chinese houses. (4)An analysis of space organization preferences with respect to common spaces revealed that Korean households tend to prefer the open plan of common spaces.

• Earthquakes and Structures
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• v.18 no.3
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• pp.321-335
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• 2020

The aim of the present contribution is to consider and underline the essential interactions among the historical knowledge, the seismic vulnerability assessment, the investigation experimental tools, the preservation of the architectural quality and the strengthening design in regard to architectural heritage conservation. These topics are argued in relation to Palazzo Murena in Perugia, designed in the eighteenth century by the famous Architect Luigi Vanvitelli, and currently headquarters of the city's University. Based on the surveys and the visual inspections, a preliminary a priori global analysis has been performed by means of the FME method. The obtained results permitted to plan an experimental tests campaign inclusive of structural health monitoring. The new achieved "knowledge" of the building allowed to refine the seismic safety assessment. In particular it was highlighted that the "mezzanine floor" can be a vulnerable element of the building with the collapse of its masonry walls. Preserving the architectural characteristics, a local reinforcement intervention is proposed for the above-mentioned level; this consists of the application of plaster with FRCM, assuring an adequate strength, without burden the masonry structure with additional weight, and therefore a decreasing of the seismic vulnerability. The necessity to consider, in this ongoing research, other local mechanisms is highlighted in the unfolding of the last part of work.