본 연구에서는 마찰력에 따른 TMD의 작동-정지조건과 각 조건에 따른 운동방정식을 정리하고, TMD의 마찰계수가 풍진동 제어성능에 미치는 영향을 수치해석을 통하여 확인하였다. 일반적인 하중과 달리 풍하중은 크기와 방향의 변화가 크기 때문에 TMD 는 마찰력에 의하여 작동-정지상태를 반복하게 되므로, TMD의 마찰계수를 주요 변수로 설정하였다. 또한 외부하중의 크기, 구조물의 진동수, TMD의 질량비도 매개변수로 설정하여 TMD의 제진성능에 대한 영향을 파악하고자 하였다. 자유진동, 조화강제진동, 풍진동에 대한 수치해석의 결과, 외부하중의 크기가 작고, 구조물의 진동수가 낮을수록 마찰계수에 의한 TMD의 제진성능의 손실이 커질 수 있음을 확인하였으며, 초고층 건물에 대한 TMD 설계시 마찰계수의 영향을 반드시 고려하여야 할 것으로 판단된다.

Temporary structures are essential elements in the high-rise structures. They are various and one of them, prefabricated shoring system is very useful. Because it is easy to install prefabricated shoring system. But collapse disaster of prefabricated shoring system occurs every year. In most situations, design deficiency and lacking in strength of vertical member give rise to the collapse. In this study, buckling stability of prefabricated shoring system was analyzed in the design phase.

This study focuses on presenting a resistance capacity model of bridge which considers the surrounding environment. This model provides the timely decreasing characteristics of resistance capacity during the service life of bridge. The presented model is developed by using the statistical data announced to the public and the reliable research reports. The developed model is applied to evaluate the lifetime safety/reliability of a bridge. Based on the result of this evaluation, this study aims to accumulate the basic data of bridge maintenance works.

The expression 'Resistance capacity' in bridge engineering indicates the certain qualitative level of important characteristics that a bridge possesses, against the various types of action or load. Even if the bridges are constructed with similar feature, the resistance capacities evaluated from these bridges are different due to the uncertainties. This study focuses on presenting a resistance capacity model of bridge which considers the uncertainties caused from the statistical characteristics of bridge members. The developed model is applied to evaluate the lifetime safety/reliability of a bridge. Based on the result of this evaluation, this study aims to improve the effectiveness of bridge maintenance works.

This study represented simulation that analyzes extreme load effect based on reasonable probability model reflected actual traffic characteristics on a bridge. Through its simulation, vehicular loads for load carrying capacity assessment were developed by considering traffic characteristics and remaining service life, various structure. According to the analysis results on traffic characteristics through its simulation, extreme load effect tended to increase as the traffic volume and heavy vehicle proportion increase.

Based on the study of bridge live loads and traffic modes for using WIM datas, it was found that the structural integrity of bridges was damaged by overloaded heavy vehicles. The objective of the study is to investigate the statistical characteristics of vehicle loadings based on survey data collected, in which some major factors, such as vehicle configurations, vehicle weights, traffic modes, etc., are incorporated. The vehicle load effects due to single presence of heavy truck are also tested with several short- span bridges and probabilistic characteristics of current design practices are evaluated.

The trend of heaviness causes the increase in the number of overloaded vehicles on a bridge, which is a difficulty in the decision of design live load. However, there is no established system to control the overloaded vehicles. In this paper, a management system to control the total number of heavy vehicles on a bridge using BWIM. The traffic management system uses the control methods based on approaching time intervals.