• 한국화재소방학회논문지
• /
• 제24권1호
• /
• pp.54-63
• /
• 2010

2009년 1월 1일부터 개정 "소방시설공사업법"의 시행에 따라 일정한 건축물의 경우에는 반드시 성능 위주소방설계를 하여야 한다. 성능위주소방설계는 구조 면적 용도 수용인원 등 건축물의 특성을 반영하여 가장 효율적으로 소방안전을 달성하고자 하는 설계이다. 성능위주소방설계는 일반적인 소방대상물에 비해 규모나 구조에서 특성이 있는 건축물로서 "국가화재안전기준"으로 대표되는 사양위주설계로 화재안전을 담보할 수 없거나 획일적인 소방설계를 하는 것이 부적합한 건축물 등에 있어 의미가 있다. 그러나 소방관련 법령에서는 성능위주소방설계의 의무대상물과 설계자격만을 규정하고 있고, 성능위주소방설계제도를 시행하기 위한 그 밖의 구체적인 사항에 관한 규정을 두지 않고 있기 때문에 실제 시행상의 어려움이 발생하고 있다. 이 논문에서는 성능위주소방설계와 관련하여 현행법령을 분석함으로써 성능위주소방설계제도의 바람직한 시행을 위한 법제도적 개선방안을 제시한다.

• 한국화재소방학회논문지
• /
• 제24권1호
• /
• pp.15-23
• /
• 2010

현재의 화재안전기준에서 규정하는 화재감지기의 배치방법은 면적에 따라 규정된 숫자를 적정하게 배치하는 수준이다. 이 기준은 과학적인 근거는 가지고 있지 못하다. 외국의 기준을 도입하여 그에 따라서 설치하고 있을 뿐이다. 소방시설을 설계하는 방법에는 화재안전기준과 같이 명문화 된 규정에 따르는 규범위주설계(Prescriptive-based)와 화재역학, 구조역학, 재료역학, 유체역학, 열역학 등 공학적 지식을 바탕으로 하는 성능위주설계(Performance-based design)가 있다. 현재로서는 성능위주설계가 활성화 되지 않았지만, 최근 소방시설공사업법은 성능위주설계방법을 이용하여 소방시설을 설계 할 수 있도록 개정('05. 8. 4)되었으며 그 시행령('07, 1. 24)에서 성능위주설계를 적용할 특정소방대상물의 범위를 정하고 있다. 이러한 시점에서 자동화재탐지설비의 화재감지기를 최적의 위치 및 거리에 설치하기 위하여 그에 대한 공식의 도입과 공식을 Software로 계산할 수 있도록 시뮬레이터를 제작하여 계산하고 규범위주설계에 따라 배치한 화재감지기의 상태와 비교 분석하며 향후 성능위주설계 방법으로서 정착시키기 위하여 연구를 시도하였다.

• Wind and Structures
• /
• 제32권4호
• /
• pp.283-292
• /
• 2021

Performance-based seismic design (PBSD) is currently used for retrofitting of older buildings and the design of new buildings. Whereas, application of performance-based design for wind load is still under development. The tendency has been in the codes to increase wind hazard based on recent recorded events. Since tall buildings are highly susceptible to wind load, necessity for developing a framework for performance-based wind design (PBWD) has intensified. Only a few guidelines such as ASCE (2019) provide information on using PBWD as an alternative for code prescriptive wind design. Though wind hazards, performance objectives, analysis techniques, and acceptance criteria are explained, no recommendations are provided for several aspects like how to select a proper level of wind hazard for each target performance criterion. This paper is an attempt to explain current design philosophy for wind and seismic loads and inherent connection between the components of PBSD for development of a framework for PBWD of tall buildings. Recognizing this connection, a framework for PBWD based on limits set for serviceability and strength is also proposed. Also, the potential for carrying out PBWD in line with ASCE 7-16 is investigated and proposed in this paper.

• 한국공간구조학회논문집
• /
• 제12권3호
• /
• pp.63-70
• /
• 2012

본 연구에서는 변위기반 성능설계 개념에 의해 기존 철근콘크리트 기둥과 콘크리트에 강재를 매입한 SRC 합성기둥에 대하여 최대 설계지진 가속도에 대한 내진성능개선의 성능설계을 비교하였다. SRC 합성기둥은 구조물의 강도를 증가시킬 뿐 아니라 연성도를 증가시키는 효과가 있다. SRC 합성기둥의 단면은 H형 강재와 원형의 중공 강관을 매입한 형태로 구성되어 있다. SRC 합성기둥에 대한 P-M상관도와 단면 공칭휨모멘트를 분석하고 이를 바탕으로 SRC 합성기둥에 대한 설계 변위 추정을 위해 변위기반 내진 설계 알고리즘을 제시하였다. 성능기반설계에 의한 성능개선설계를 위하여 목표성능변위 및 설계지진가속도 조건에 대해 직접변위 기반 설계방법 및 변위계수법에 의한 내진성능개선 설계 방법을 제시하였다. SRC 합성기둥은 기존 RC 기둥과 비교하여 성능개선 설계 결과 변위 연성비 및 변위성능에서 크게 개선된 성능설계 결과를 나타내었다.

• 대한기계학회논문집A
• /
• 제33권12호
• /
• pp.1449-1454
• /
• 2009

The performance variation of a multibody system is affected by a variation of various design variables of the system. And the effects of design variable variations on the performance variation must be considered in design of a multibody system. Accordingly, a variation analysis of a multibody system needs to be conducted in design of a multibody system. For a variation analysis of a performance, population mean and variance which are called statistical parameters of design variables are needed. However, an evaluation of statistical parameters of design variables is impossible in many practical cases. Therefore, an estimation of statistical parameters of the performance based on sample mean and variance which are called statistic of design variables is needed. In this paper, the variation analysis method for a multibody system based on design variable samples was proposed. And, using the proposed method, a variation analysis of the vehicle ride comfort based on sample statistic of design variables was conducted.

• Earthquakes and Structures
• /
• 제11권6호
• /
• pp.967-982
• /
• 2016

Current codes design the buildings based on life safety criteria. In a performance-based design (PBD) approach, decisions are made based on demands, such as target displacement and performance of structure in use. This type of design prevents loss of life but does not limit damages or maintain functionality. As a newly developed method, resilience-based design (RBD) aims to maintain functionality of buildings and provide liveable conditions after strong ground movement. In this paper, the seismic performance of plain and strengthened RC frames (an eight-story and two low-rise) is evaluated. In order to evaluate earthquake performance of the frames, the performance points of the frames are calculated by the capacity spectrum method (CSM) of ATC-40. This method estimates earthquake-induced deformation of an inelastic system using a reduced response spectrum. Finally, the seismic performances of the frames are evaluated and the results are compared with a resilience-based design criterion.

• 국제초고층학회논문집
• /
• 제11권4호
• /
• pp.363-368
• /
• 2022

For taller buildings with unconventional architecture, refined structural systems or in geographical areas with high wind conditions, performance-based design can be seen as an enhanced design process and is either a supplement to, or alternative to a prescriptive code-based design. The ultimate goal of Performance-Based Wind Design (PBWD) is to result in a building that better addresses key goals of performance over the buildings full life cycle. Major innovations around the use of a PBWD approach include nonlinear dynamic analysis for wind design, limited inelasticity in the main wind force resisting system elements, and system-based performance criteria. This paper discusses potential considerations and benefits made when using a performance-based approach, in addition to the general practicality of use, for the structural design on a few key tall buildings.

• Steel and Composite Structures
• /
• 제51권2호
• /
• pp.173-183
• /
• 2024

This study investigates a new seismic retrofit system that utilizes rotational friction dampers and axial springs. The retrofit system involves a steel frame with rotational friction dampers (RFD) at beam-column joints and linear springs at the corners, providing energy dissipation and self-centering capabilities to existing structures. The axial spring acts as a self-centering mechanism that eliminates residual deformations, while the friction damper mitigates seismic damage. To evaluate the seismic performance of the proposed retrofit system, a series of cyclic loading tests were carried out on a steel beam-column subassembly equipped with the proposed devices. An analytical model was then developed to validate the experimental results. A performance point ratio (PPR) was presented to optimize the design parameters of the retrofit system, and a performance-based seismic design strategy was developed based on the PPR. The retrofit system's effectiveness and the presented performance-based design approach were evaluated through case study models, and the analysis results demonstrated that the developed retrofit system and the performance-based design procedure were effective in retrofitting structures for multi-level design objectives.

• Earthquakes and Structures
• /
• 제9권5호
• /
• pp.1045-1067
• /
• 2015

A performance-based design (PBD) procedure, initially proposed for the seismic design of buildings, is tailored herein to the structural configurations commonly adopted in bridges. It aims at the efficient design of bridges for multiple performance levels (PLs), achieving control over a broad range of design parameters (i.e., strains, deformations, ductility factors) most of which are directly estimated at the design stage using advanced analysis tools (a special type of inelastic dynamic analysis). To evaluate the efficiency of the proposed design methodology, it is applied to an actual bridge that was previously designed using a different PBD method, namely displacement-based design accounting for higher mode effects, thus enabling comparison of the alternative PBD approaches. Assessment of the proposed method using nonlinear dynamic analysis for a set of spectrum-compatible motions, indicate that it results in satisfactory performance of the bridge. Comparison with the displacement-based method reveals significant cost reduction, albeit at the expense of increased computational effort.

• 한국지진공학회논문집
• /
• 제2권3호
• /
• pp.73-81
• /
• 1998

In this paper, the necessity of developing effective nondestructive testing and monitoring techniques for the evaluation of structural integrity and performance is described. The evaluation of structural integrity and performance is especially important when the structures and subject to abrupt external forces such as earthquake. A prompt and extensive inspection is required over a large area of earthquake-damaged zone. This evaluation process is regarded as a part of performance-based design. In the paper, nondestructive testing and monitoring techniques particularly for concrete structures are presented as methods for the evaluation of structural integrity and performance. The concept of performance-based design is first defined in the paper followed by the role of evaluation of structures in the context of overall performance=based design concept. Among possible techniques for the evaluation, nondestructive testing methods for concrete structures using radar and a concept of using fiber sensor for continuous monitoring of structures are presented.