본 논문에서는 신뢰성 기반 최적설계(RBDO)에서 성능함수의 비선형성을 고려한 효율적인 차원감소법(DRM)을 제안한다. 차원감 소법은 적분직교점과 가중치를 사용하여 1차 신뢰도법(FORM) 보다 더 정확하게 신뢰도를 평가하는 반면 성능함수를 추가로 해석해 야하기 때문에 적분직교점의 개수가 증가하면 효율성이 저해된다. 본 논문에서는 신뢰성 기반 최적설계에서 성능함수의 비선형도를 평가하고, 비선형도에 따라 적분직교점의 수를 결정하는 기준을 제안한다. 이를 통해 신뢰성 기반 최적설계가 진행될 때 반복마다 적 분직교점의 수를 조절하여 차원감소법의 정확도는 유지하면서 계산의 효율성은 개선하는 방안을 제안한다. 성능함수의 비선형도 평 가는 최대가능목표점(MPTP) 탐색에 사용한 벡터 사이의 각도를 통해 이루어지며, 수치 테스트를 통해 비선형도에 따른 적절한 적분 직교점의 수를 도출하였다. 2차원 수치예제를 통해 개발된 방법이 차원감소법이나 몬테카를로 시뮬레이션(MCS)의 정확도는 유지하 면서 효율성이 향상된다는 것을 확인하였다.

Engineering design primarily focuses on product improvement through enhancing existing functionalities, integrating features, or adding new capabilities. In other words, it can be said that more design(adaptive design) changes to existing products based on benchmarking with competing products, differentiation strategies, changes in customer needs, etc. are actually performed rather than developing new products that did not exist before. Especially in the case of custom production, such as ships or buildings, a significant portion of actual design work involves modifying and adjusting past performance data according to the current customer's requirements. Therefore, design methods should be developed in a way that effectively supports these processes. Therefore, in this study, as QFD (Quality Function Deployment) ‘analysis of existing products’ and ‘creation of new alternatives’ is supported in Marine Concept Design with AHP (Analytic Hierarchy Process) techniques such as ‘Value Evaluation in Analysis Work’ and ‘Design Alternative Evaluation’, as a result, basic research was conducted on whether it could be used as a tool to effectively support the flow of the design process.

Taguchi method is one of the most popular approaches for design optimization such that performance characteristics become robust to uncontrollable noise variables. However, most previous Taguchi method applications have addressed a single-characteristic problem. Problems with multiple characteristics are more common in practice. The multi-criteria decision making(MCDM) problem is to select the optimal one among multiple alternatives by integrating a number of criteria that may conflict with each other. Representative MCDM methods include TOPSIS(Technique for Order of Preference by Similarity to Ideal Solution), GRA(Grey Relational Analysis), PCA(Principal Component Analysis), fuzzy logic system, and so on. Therefore, numerous approaches have been conducted to deal with the multi-characteristic design problem by combining original Taguchi method and MCDM methods. In the MCDM problem, multiple criteria generally have different measurement units, which means that there may be a large difference in the physical value of the criteria and ultimately makes it difficult to integrate the measurements for the criteria. Therefore, the normalization technique is usually utilized to convert different units of criteria into one identical unit. There are four normalization techniques commonly used in MCDM problems, including vector normalization, linear scale transformation( max-min, max, or sum). However, the normalization techniques have several shortcomings and do not adequately incorporate the practical matters. For example, if certain alternative has maximum value of data for certain criterion, this alternative is considered as the solution in original process. However, if the maximum value of data does not satisfy the required degree of fulfillment of designer or customer, the alternative may not be considered as the solution. To solve this problem, this paper employs the desirability function that has been proposed in our previous research. The desirability function uses upper limit and lower limit in normalization process. The threshold points for establishing upper or lower limits let us know what degree of fulfillment of designer or customer is. This paper proposes a new design optimization technique for multi-characteristic design problem by integrating the Taguchi method and our desirability functions. Finally, the proposed technique is able to obtain the optimal solution that is robust to multi-characteristic performances.

Reinforcement learning (RL) is widely applied to various engineering fields. Especially, RL has shown successful performance for control problems, such as vehicles, robotics, and active structural control system. However, little research on application of RL to optimal structural design has conducted to date. In this study, the possibility of application of RL to structural design of reinforced concrete (RC) beam was investigated. The example of RC beam structural design problem introduced in previous study was used for comparative study. Deep q-network (DQN) is a famous RL algorithm presenting good performance in the discrete action space and thus it was used in this study. The action of DQN agent is required to represent design variables of RC beam. However, the number of design variables of RC beam is too many to represent by the action of conventional DQN. To solve this problem, multi-agent DQN was used in this study. For more effective reinforcement learning process, DDQN (Double Q-Learning) that is an advanced version of a conventional DQN was employed. The multi-agent of DDQN was trained for optimal structural design of RC beam to satisfy American Concrete Institute (318) without any hand-labeled dataset. Five agents of DDQN provides actions for beam with, beam depth, main rebar size, number of main rebar, and shear stirrup size, respectively. Five agents of DDQN were trained for 10,000 episodes and the performance of the multi-agent of DDQN was evaluated with 100 test design cases. This study shows that the multi-agent DDQN algorithm can provide successfully structural design results of RC beam.

최근 토목공학 분야 내 현장조건을 구현할 수 있는 스마트 건설 기술의 요소기술로서 3D 프린팅 기술의 적용 분야 가 확대되고 있다. 센서기술의 보조도구, 모듈러 시공상 적용 등으로 다양하게 활용되고 있는 가운데 3D 프린팅 기술을 단순 부재 제작이 아닌 각각의 부재들이 최대 성능을 발휘할 수 있는 최적설계 도출 방안으로 활용하고자 한다. 이를 위해 3D 프린 팅 재질인 필라멘트를 활용하더라도 신뢰성 있는 최적설계가 도출이 가능한지에 대한 연구가 선행되어야 하며, 이에 본 연구에 서는 지반보강재 중 하나인 지오셀 관련 선행연구 결과와 필라멘트의 물성치가 적용된 해석 결과와의 비교를 통해 재료적 신뢰 성을 검증하고자 한다. 해석 결과, 지오셀 구성요소에 따른 보강성능의 경향이 기존 선행연구 결과와 일치함을 확인하였기에 필 라멘트를 활용하더라고 충분히 신뢰성 있는 최적설계가 도출이 가능할 것이라 판단된다.

The purpose of this study is to understand the concept of zero-waste design and to apply Sophia Vyzoviti’s folding techniques to develop a zero-waste fashion design method that contributes to sustainable fashion design. In this study, we explore the method and characteristics of zero-waste fashion design based on the concept of folding described in Sophia Vyzoviti’s book on folding techniques. Using the autonomy of Sophia Vyzoviti’s folding technique, four changeable folding fashion designs were developed and produced, demonstrating zero-waste fashion design. The results were as follows. First, the development of fashion designs using Sophia Vyzoviti’s folding techniques enabled the development and production of free and creative zero-waste fashion designs that were three-dimensional, continuous, fluid, and full of potential. Second, the production of zero-waste patterns was further developed into a transformable fashion design that can be used with geometric patterns. These folding techniques produced a fashion design method that could transform one piece of clothing, demonstration the potential for maintenance of creativity using a zero-waste design based on these folding techniques. Third, the double-faced fabric, Neoprene, was chosen as an appropriate material as it emphasizes the depth of folding with application of two colors and its cotton/polyester blend that is suitable for folding.

현재 국내외적으로 다양한 강재 댐퍼의 형상에 대한 연구가 이뤄지고 있다. 강재 댐퍼는 제진장치 중 하나로 항복을 통해 지진에너지를 흡수 및 소산하여 본 구조물을 보호한다. 최근 적용되고 있는 면내 전단 변형에 의해 작동하는 댐퍼는 응력이 특정 부위에 집중되어 재료의 대부분이 본래의 역량을 발휘하지 못하는 한계가 있었다. 따라서, 본 연구에서는 이 한계를 극 복하고자 전역 최적화 기법 중 하나인 뻐꾸기 탐색을 적용해 최적 형상을 설계하였다. 탐색된 최적 형상을 토대로 수치해석과 실제 실험을 통한 성능검증을 수행했다. 최적 형상으로 설계된 댐퍼는 안정적인 이력거동을 보이고, 높은 에너지 소산능력을 확 보하는 것으로 나타났다. 본 연구에서는 전역 최적화 기법을 적용한 최적 설계 방법을 제시하고 그 결과를 검증함으로써, 다양한 형태의 공학적 문제 해결에 대한 적용 가능성을 제시하였다.

Electronic document communication based on a digital channel is becoming increasingly important with the advent of the paperless age. The electronic document based on PDF format does not provide a powerful customer experience for a mobile device user despite replacing a paper document by providing the content integrity and the independence of various devices and software. On the other hand, the electronic document based on HTML5 format has weakness in the content integrity as there is no HTML5 specification for the content integrity despite its enhanced customer experience such as a responsive web technology for a mobile device user. In this paper, we design the Document-HTML, which provides the content integrity and the powerful customer experience by declaring the HTML5 constraint rules and the extended tags to contain the digital signature based on PKI. We analyze the existing electronic document that has been used in the major financial enterprise to develop a sample. We also verify the Document-HTML by experimenting with the sample of HTML electronic communication documents and analyze the PKI equation. The Document-HTML document can be used as an authorized electronic document communication and provide a powerful customer experience in the mobile environment between an enterprise and a user in the future.

본 연구에서는 철골편심가새골조 시스템을 대상으로 다목적최적화기법을 통해 설계를 수행하고 그 결과를 분석하였다. 최적화 설 계를 위해 유전 알고리즘의 일종인 NSGA-II를 활용하였다. 여기서, 목적함수는 이율배반적 관계를 갖는 구조물량과 층간변위로 하여 최소화되고, 제약조건에는 구조기준에서 요구하는 내력비, 링크의 회전각 등을 포함하였다. 제약조건은 최적화 알고리즘 내에서 각 항목을 위반할수록 목적함수 값을 크게 증가시키는 벌금함수의 형태를 가지고 있다. 설계기준에서 EBF 시스템의 설계규정은 링크 부재만 항복이 허용되며 나머지 부재는 링크 항복 시 발생되는 부재력을 탄성상태에서 견디도록 의도한 역량설계법에 기초한다. 그러나 최적화를 통해 도출된 결과 중 일부는 구조기준의 설계조항은 만족하지만 특정층 링크에 소성변형이 집중되어 연약층을 형성함 으로써 기준에서 의도하는 역량설계의 원칙을 위배하는 결과가 나타났다. 이를 해결하기 위해 모든 링크의 전단 초과강도계수 중 최 대값이 최소값의 1.25배를 넘지 않도록 하는 제약식을 추가하였다. 새로운 제약식을 추가한 경우 모든 최적해는 설계기준과 역량설계의 원칙을 준수하는 것으로 나타났다. 모든 설계안에서 보 경간에 대한 링크의 길이비는 전단링크의 범주에 해당하는 10% ~ 14%였다. 전체적으로 설계안들은 링크의 초과강도 계수비가 가장 지배적인 제약으로 작용하였으며, 구조기준의 요구사항 중 층간변위와 내력비 등의 항목에서 허용치에 비해 매우 보수적으로 설계되었다.

The domestic of modern architectural remodeling method emphasizes simple aesthetic elements, and the correct design and construction methods are not established based on quantitative grounds, thus damaging the value of cultural properties. This study attempts to re-examine the value of modern buildings recognized as old buildings. It is a basic step to present the correct remodeling of the building. The design criteria for exterior wall remodeling of modern buildings were presented. These research results are suitable for energy conservation design standards and can prevent defects in buildings. In the future, more accurate analysis will be required by securing physical property values for various domestic materials through subsequent research.

목적 : 본 연구는 렌즈를 향해 입사하는 광선의 구면수차를 제거하기 위해 광선추적법과 스넬의 법칙을 사용하 여 계산과정을 유도하여 렌즈를 설계하였다. 방법 : 스넬의 법칙을 활용하여 렌즈의 초점이 한 점으로 진행하도록 역산하여 설계하는 과정을 거친 후 광학 시뮬레이션 소프트웨어인 SPEOS를 활용하여 수치를 측정하였다. 결과 : 렌즈의 입사각에 따라 렌즈의 후면 곡률반경이 변화하였고, 일정 입사고에 도달하였을 때 렌즈 후면의 곡률반경이 구면수차 보정함으로 인해 일정 입사고 이전의 값에서 변화하는 구간이 발생하였다. 결론 : 본 연구를 통해 구면수차를 제거하는 렌즈를 스넬의 법칙과 광선추적의 방식으로 설계하여 광학 시뮬레 이션 소프트웨어를 통하여 구현하였다. 이를 통하여 스넬의 법칙을 이용한 광선 추적방식의 설계가 구면수차를 제 거한 비구면렌즈의 제작에 있어서 도움이 될 것으로 기대한다.

Currently, the commercialization of the 5th Generation (5G) service is becoming more prevalent in domestic communication network technology. This has reduced communication delay time and enabled large-capacity data transmission and video streaming services in real-time. In order to keep pace with these developments, K-water has introduced a smart process control system in water purification plants to monitor the status of the water purification process. However, since wireless networks are based on the public Long Term Evolution (LTE) network, communication delay time remains high, and high-resolution video services are limited. This is because communication networks still have a closed structure due to expense and security issues. Therefore, with 5G in its current form, it is very difficult to accommodate future services without improving the infrastructure of its communication networks. In recognition of these problems, this study implemented the authentication and management function of wireless networks on a wired network management system in the K-water Bansong water purification plant. The results confirmed that wired Local Area Network (LAN) services give a higher security performance than an expensive commercial wireless LAN system. This was achieved by using an Internet Protocol (IP) address management system of wired networks and the packet filtering function of the Layer2 (L2) switch. This study also confirmed that it is possible to create a wireless LAN service that is 3.7 times faster than the existing LTE communication network.

This research was conducted to elucidate the optimum conditions for the antibacterial activity of konjak jelly using the evolutionary operation-factorial design technique. In the first set of experiments, concentration of a coagulation agent, soaking liquid, and temperature of water were set to 0.4%, 0.6×10－2 N, and 65℃ as a central point, respectively. The highest antibacterial activity was acquired at E21, in which the number of bacteria was 1.25 log cfu/g. Because the code of changes in the main effect was (-), it could be decided that the central point of the first set was not the optimum point. Although antibacterial activity in the second set was improved, the values of the main effect were higher than that of changes in the mean effect. The central point of third set was concentration of coagulation agent 0.8%, concentration of soaking liquid 1.0×10－2 N, and temperature of water 65℃. It was found that the antibacterial activity of central point in the third set was highest among all the tested set. Further, all the necessary conditions were appropriate to reach the optimum condition. The antibacterial activity of the central point in third set was more than 1,000 times higher than that of E11, in first set.

This study considers the modern expression of oriental esthetics by analyzing the fashion design with the Chinese ink technique based on the concept of Chi-Yun- Sheng-Tung, which was regarded as the best rule of art creation in oriental history. This study was performed by conducting a literature review of related books and advanced studies, and then, collection analysis was done with photos derived from fashion websites (seoulfashionweek.org, chinafashionweek.org, vogue.com, firstview. com) from 2010 S/S to 2016 S/S. A total of 317 fashion photos of designs created using the Chinese ink technique by Korean designers at Seoul Fashion Week and Chinese designers at China Fashion Week were analyzed. The contemporary fashions created with the Chinese ink technique were characterized by, first, the bold brush strokes and natural spreading effects of Chinese ink, second, the emphasis of empty space by taking essential elements, and third, the coexistence of deep Chinese ink colors with modern primary colors. The formativeness of the contemporary fashions created with Chinese ink technique based on Chi-Yun-Sheng-Tung were as follows: first, temperance, pursuing spiritual and minimal expression, second, empty space, making design elements interact and pursue harmony, third, changeable rhythm, symbolizing the growth and variation revealing the power of life, and fourth, vitality, represented in the rhythmical movement of the brush. This study was based on the oriental esthetics inherent in Chi-Yun-Sheng-Tung, and it attempted to analyze contemporary fashion design. The aim was to show the possibility of modern applications to traditional values, and it can be a meaningful case in design planning based on culture.

동궁과 월지는 통일신라시대에 조성된 넓은 수면의 원지를 중심으로 한 궁원으로 추정된다. 원지는 입수부, 연못, 출수 부로 구성되어 있으며, 특히 입수부는 독자적인 특징을 보이는 수경시설로 구성되어 있다. 본 연구는 월지 입수부의 수경에 대한 디자인수법을 밝힘으로써 통일신라시대의 궁원을 이해하고 원지조영에 대한 작법의 단초를 제공하고자 한다. 연구방법으로 동궁과 월지에 대한 발굴조사 성과를 바탕으로 발굴조사의 내용과 복원된 수경시설에 대한 조사와 분석 을 통하여 입수부에 대한 수경 디자인수법을 도출한다. 원지의 입수부는 직선형수로, 석조, 소지, 계류형수로, 폭포로 구성되어 다채로운 수경을 연출하고 있는데 각각의 디 자인 수법은 다음과 같다. 기하학적인 인공형태의 직선형수로는 수로의 초입부에서 직각으로 수류방향을 바꾸는 굴절점 을 세 차례 반복하는 선형을 보이는데 이는 건축물의 축선을 따른 것으로 건축물의 세력권에 영향을 받은 형태의 디자인 수법으로 볼 수 있다. 상하로 연결된 2단 석조는 물을 담은 큰 그릇으로써의 이용을 고려한 것으로 상하의 단차에 의한 물의 약동은 시각 및 청각적인 효과를 위한 디자인수법이다. 또한 석조 주위의 판석과 외연벽석으로 형성된 한정된 공간 은 가장 가까이에서 물을 접할 수 있는 친수공간으로 디자인된 수경공간이다. 완만한 곡선의 타원형에 가까운 형태의 소지는 호안의 축조와 바닥처리 및 경석의 배치에 있어서 독자적인 디자인 수법을 보이며, 기능적으로는 폭포수의 일정 한 수량공급을 위한 저수지의 역할을 한다. 자연스러운 분위기를 연출하는 계류형 수로는 직선형 수로와 대비되는 디자 인으로 호안을 축조하는 방식에서 최대한 자연스럽게 보이기 위한 수법을 보여준다. 입수부의 마지막 단계로서 극단적 인 시각적 변화를 보여주는 폭포는 수로와 원지의 단차를 해결하는 디자인수법으로 사용되었으며, 위치설정에 있어서 완전노출을 피하여 흥미를 유발시키는 고차원의 수법이 적용되었다. 다섯 단계로 구성된 다채로운 입수부의 수경시설은 근접한 건축물의 영향을 받는 직선형의 인공적 디자인의 수경수법 에서 시작하여 점차적으로 그 영향에서 벗어나 자연스러움을 보여주는 디자인의 발전단계를 보여주는 수경시설의 디자 인수법을 보여주고 있다.

In the age of hybrid, the fashion industry has created multiple patterns of hybrid fashion due to mixed styles and genres. Fashion mixed with tradition and future and various cultures is emerging as a trend so that Asian cultures are reinterpreted in a modern way(Samsung Design Net. 2014). Korean images also change every year into a new type of cultural hybrid. This study aims to present esthetic and trendy hybrid outer wear designs applicable to the fusion of tradition and present and the west and the east as well as diverse life styles for the major target of consumption, the senior generation with young sense. This study conducted both theoretical and empirical study. The theoretical study looked into the characteristics of digital fashion illustrations using Sumuk technique and of senior outer wear through the precedent study and literature. In the empirical study, fashion illustrations were made according to the characteristics of digital fashion illustrations with Sumuk technique, and then fabric was made through digital printing. By doing so, hybrid outer wear designs for the senior generation were developed based on the characteristics of senior outer wear, and the real artwork was made. The findings are as follows. First, the characteristics of digital fashion illustrations using Sumuk technique are the hybrid expression where the spirit of inner feeling of oriental thinking, implications of symbolism and metaphor through blanks and lines, and fortuity of ink blurs and lines are recreated in a modern way through digital fashion illustration characteristics such as hybridity of multi-cultures and heterogeneous factors, expandability of blurring boundary, human-oriented playfulness, and sensibility of inner expression. Second, outer wear for the senior generation puts the most emphasis on aesthetic factors including designs, styles, youth, and complement of figure, followed by symbolism such as convenience of dressing or undressing, comfort, functionality of flexible size, trend, express of individuality, and dignity. In addition, this generation prefers outdoor wear for social, cultural, and casual activities and demand hybrid city wear designs adding the characteristics of outdoor wear that is highly worn for various city life styles. Third, the design motifs of fabric made by digital printing of Sumuk technique-based digital fashion illustrations include traditional ornaments of Joseon Dynasty such as norigae(Korean traditional ornaments worn by women), binyeo(Korean traditional ornamental hairpin), and ddeoljam(ornamental hairpin), mix traditional and Korean spirit with modern sensibility, and connote esthetic beauty of ornamental effects for women’s beauty and symbolism of lucky signs and wishes. Fourth, senior outer wear was designed using the made fabric. Work 1 arranged prints with the motif of traditional norigae in a spaced pattern. Hybrid outer was designed with comfortable, light, and reversible functions by using A line silhouette considering the senior generation’s figure, single buttons for easy clothing change, and outdoor wear materials and highlighted the utilization of city wear. Work 2 used border pattern of fashion illustration prints that use binyeo as its motif, and it was designed for social and cultural life styles with the fusion of tradition, which uses tent silhouette durumagi(traditional Korean outer coat) and composition lines that are plane and straight lines, and modernism. It highlighted functionality by using zippers and single buttons for each clothing changing and outdoor materials. Work 3 arranged fashion illustrations made by the motif of ddeoljam in a spaced pattern. This is a balloon silhouette considering the senior generation’s figure and a urban, modern design with unbalanced hem line with asymmetry of light and left. A zipper was attached, and a light and flexible outdoor material was used to emphasize its functionality. Work 1, 2, and 3 made the fabric of cultural hybrid sense using Sumuk technique-based digital fashion illustrations and used the design considering the senior generation’s figure and an outdoor material, and expressed easy clothing change and design of city wear. This is a hybrid senior fashion design expressing the fusion and coexistence of traditional and modern beauty, Korea’s oriental beauty and modern western beauty, and outdoor wear’s functionality and city life styles. This study will contribute to the invigoration of the senior fashion market that is newly emerging and the development of high-value added products as it presents hybrid outer wear adding functionality applicable to various life styles for the senior generation with the young sense.

In this paper, we present a new method for interactive movie that can be automated running without any coordinator. The presented method can also be automated and same effect as an experimental short film. Movie content is developed using interaction with motion recognition system and plots that require attention for more intensively and interest. In addition to a simple questions was conducted before and after watching contents for determine the effects of movie content and reaction of viewers. Through the interactive movie content has been investigated.

선박운항 시뮬레이터와 같이 시스템이 복잡하고 사용자의 요구사항이 다양한 시스템에 대한 유지보수는 개발 못지않게 매우 어려운 업무이다. 이에 본 논문에서는 시뮬레이터 유지보수를 어렵게 하는 여러 요인에 대해 분석하고, 효율적인 유지보수를 위해 설계 및 개발 단계에서부터 고려해야 할 대책들로 접근 및 교환 용이성 향상 방안, 복잡한 시스템 유지 방안, 복합 영역 관리 방안, 사용자 요구사항 수렴 방안 등 여러 방안들에 대한 실무적인 연구 결과를 제

본 연구에서는 프리폼(free form)을 가지는 공간구조물의 유한요소망을 자동으로 생성하는 기법을 개발하고 그 배경이론과 수치실험 결과 그리고 이용방안에 대하여 기술하였다. 본 연구를 통하여 제시한 유한요소망 생성기법은 공간구조물의 해석을 위해 전통적으로 이용하던 형태별 자동생성기법의 한계를 극복하기 위하여 개발 되었다. 개발된 자동 생성기법은 최근 연속체 쉘 구조물의 형태를 정확히 구현하기 위해 활발히 이용되고 있는 CAGD기법을 도입하였다. 본 연구에서 제시된 자동생성기법은 두 단계의 생성과정을 거치는데 첫 번째가 구조물의 형태를 기하학적인 모델로 표현하는 단계이며 두 번째가 표현된 기하학적인 모델에 이산화된 공간구조물을 생성하는 단계이다. 수치실험을 통하여 본 연구에서 개발된 자동생성기법이 임의의 형상을 가지는 이산화된 공간구조물을 표현하기 용이할 뿐만이 아니라 기존의 자동생성기법을 수정 이용할 수 있는 장점이 있으며 특히 이산화된 공간구조물의 형상최적화에도 효과적으로 이용될 수 있을 것으로 나타났다.

본 논문에서는 비선형 지진격리교량의 최적 설계 방법을 제시하였다. 최적설계를 위한 목적함수로는 교각과 지진격리장치의 파괴확률을 고려하였으며, 상충하는 두 목적함수를 동시에 최적화하는 다수의 해를 효율적으로 검색하고자 유전자 알고리즘에 기반한 다목적 최적화기법을 도입하였다. 또한, 최적화 과정에서 요구되는 다수의 비선형 시간이력해석을 수행하지 않고도 교량의 확률적 응답을 효율적으로 예측할 수 있는 추계학적 선형화 방법을 접목하였다. 제시하는 방법의 효율성을 검증하기 위한 수치 예로서 실제 교량인 남한강교를 고려하였고, 제안하는 방법과 기존 비선형 시간이력해석을 이용한 생애주기비용 기반 설계법을 각각 적용하여 내진성능을 비교하였다. 내진성능을 비교한 결과, 제시하는 방법이 기존의 비용에 기반한 최적설계보다 우수한 성능 및 경제성을 보임을 검증하였다. 또한, 다양한 지진하중에 대해서도 제안된 방법이 보다 개선된 성능을 보임을 확인하였다.