In this study, The recent national interest is focused on the welfare of the people, and new projects in the construction sector are being reduced, and the aging of infrastructure is not getting attention. In domestic case, most of the infrastructures were built in the 1970s to 1980s, and the road extension is also steadily increasing. Therefore, the costs to bridge maintenance from around 2010 by a similar route to that of advanced countries are also 4 times And it is time to pay attention to maintenance as well as construction. Therefore, a study was carried out on the valuation method considering bridge condition evaluation, which is a part of BIM library building and assembly program development. The proposed value evaluation method will be used as an index of the existence of bridges by comparing the cost required for maintenance and reinforcement of the target bridges and the costs required for dismantling and disposal in the bridge management system of the future program

Membrane structure is a system that is stabilized by maintaining a tensile state of the membrane material that originally cannot resist the bending or pressure. Also, it is a system that allows the whole membrane structure to bear external loads caused by wind or precipitation such as snow, rain and etc. Tension relaxation phenomenon can transpire to the tension that is introduced to the fabric over time, due to the innate characteristics of the membrane material. Thus, it is important to accurately understand the size of the membrane tension after the completion of the structures, for maintenance and management purposes. The authors have proposed the principle of theoretically and indirectly measuring the tension by vibrating the membrane surface with sound waves exposures against the surface, which is compartmentalized by a rectangular boundary, and by measuring the natural frequency of the membrane surface that selectively resonates. The authors of this paper measured the tension of preexisting membrane structure for its maintenance by using the developed portable measurement equipment. Through analyzing the measurement data, the authors review the points that should be improved and the technical method for the new maintenance system of membrane tension.

동남아시아는 섬과 강이 많은 지리적 특성과 경제 규모의 급격한 성장으로 새로운 국가시설물이 꾸준히 계획·건설되고 있으나, 국가시설물 안전진단 및 유지관리에 대한 경험과 인식이 부족하여 국가시설물(교량, 댐 등)의 붕괴사고가 지속적으로 발생하고 있다. 이에 따라 국민들의 시설물 안전성에 대한 신뢰도가 저하되고, 사회·경제적 손실 문제에 지속적으로 노출되고 있는 실정이다. 해결방안으로 동남아시아 각국은 주요 국가시설물(도로, 교량, 댐, 항만 등)에 대한 시설물 안전관리체계의 도입을 추구하여 시설물 안전진단 및 유지관리에 필요한 예산 확보의 근거를 마련하고 있으며, 유지관리사업의 일정을 제시하는 시설물 유지 관리 정책개발을 추진해오고 있다. 또한, 시설물 유지관리 정책을 몇 해 전부터 개발하여 시행하고 있는 국가들은 개별로 관리되고 있는 국가시설물의 유지관리에 대한 업무효율성을 증대시키고 기존시설물의 수명연장 및 붕괴사고 감소를 위한 효율적인 시설물 유지관리체계 도입을 추진하고 있다. 본 논문을 통해 동남아시아 각국의 시설물 안전관리 정책개발 및 시설물 유지관리 기술의 현 주소를 소개하고 향후, 이들 시장에 대한 진출방안을 제시하고자 한다.

Structures are currently a good condition in highway, with an average age of 14.7years. However, After 10 years, The old structure will be estimated 22% of the total structure. In this study, We have suggested the preventive maintenance methods such as preventive techniques and asset management for the deterioration of future by a lesson of failure cases of developed countries such as the United States.

In this paper, damage assessment technology based on statistical pattern recognition technology was developed for maintenance of structure and the performance of the developed technology was verified by vibration test. The damage assessment technique uses the improved Mahalanobis distance theory, which is a statistical pattern recognition technique, and developed to take account of the variability between the measured data. In order to verify the damage evaluation performance of the developed technology, a cable damage test was conducted for a cable-stayed bridge. Experimental results show that the developed damage assessment technology has the capability of extracting information that can determine the location of damage due to cable damage.

This study is aimed at developing a wireless unified-maintenance system (WUMS) that would satisfy all the requirements for a disaster preventive SHM system of civil structures. The WUMS is designed to measure diverse types of structural responses in realtime based on wireless communication, allowing users to selectively use WiFi RF band and finally working in standalone mode by means of the field-programmable gate array (FPGA) technology. To verify its performance, the following tests were performed: (i) A test to see how far communication is possible in open field, (ii) a modal test on a bridge to see how exactly characteristic real-time dynamic responses are of structures. Finally, the WUMS is proved valid as a SHM, and its outstanding performance is also proven.

This study is a method to improve the reliability and effectivity of maintenance. It is necessary to build the integrated management system of BIM throughout the design, construction and maintenance of the structure. In order to apply BIM, it was introduced structural record management from the design stage. And It helps to improve the reliability of maintenance.

The number of expressway structure management is continuously increasing, and the aging of structures is proceeding rapidly. In order to secure the safety of expressway structures, we propose improvement methods such as advancement of structure management system, lifetime improvement methods such as prevention of structure deterioration, and the preemptive reflection of the structure maintenance budget.

This paper aims to develop a wireless unified-maintenance system(WUMS) to obtain real-time structural response of civil structures. The WUMS integrates the GPS module, the strain module and the acceleration module based on the standalone controller, and includes the RF module for remote measurement and the battery for long term operation. In order to evaluate the performance of the WUMS, a response test using a modal shaker and a modal test using a model bridge were performed. The test results using USMS were compared with those measured by wired system. Finally, the developed WUMS was appropriate to obtain the structural response of the civil structure in real-time, unified, and wirelessly.

This paper aims to develop a wireless unified-maintenance system(WUMS) to obtain real-time structural response of civil structures. The WUMS integrates the GPS module, the strain module and the acceleration module based on the standalone controller, and includes the RF module for remote measurement and the battery for long term operation. In order to evaluate the performance of the WUMS, a response test using a modal shaker and a modal test using a model bridge were performed. The test results using USMS were compared with those measured by wired system. Finally, the developed WUMS was appropriate to obtain the structural response of the civil structure in real-time, unified, and wirelessly.

Based on IoT (Internet of Things) where its concept contains providing convenience to human life by connecting every objects around us, numerous projects have been done in civil engineering field. This paper has conducted the basic study on adopting IoT sensing technology and network system into harbor.

This study aims to establish complementary relationship among designer, builder, and maintenance manager by combining BIM(Building Information Modeling) technology with bridge safety diagnosis and maintenance to secure its effectiveness and systematization. To establish and maintain database by organizing quantities of data about existing case of safety diagnosis and maintenance, and develop the system to be used by practitioners.