In order to analyze the redundancy of steel frames in fire, it is important that the load-deformation behaviour of friction type high strength bolted joints at elevated temperature is clarified. In this paper, influences of plate thickness, end distance, fastening of bolts and steel temperature on the deformation behaviour of the bolted joints are discussed on the basis of the elevated temperature tensile test results. In case the plate is thin and the failure mode is tear-out, the ductility of the joints increases. However, if the failure mode is changed from tear-out to bolt in share due to increase of temperature or end distance, the ductility of the joints decreases. Fastening of bolts slightly affect the load-deformation behaviour of the bolted joints at elevated temperature.

In case of fire, in addition to the stress due to permanent load, the thermal stress caused by the thermal expansion occurs in a steel frame. Therefore, if the deformation caused by the thermal stress at fire condition is concentrated at a connection, there is a possibility that the connection will be failed before the steel frame reaches its ultimate state. Considering such a phenomenon, it is necessary to analyze the stress and deformation of a heated steel frame in fire condition using thermal stress analysis. In this paper, the numerical analysis model on deformation behavior of friction type high strength bolted splice connection at elevated temperature on the basis of component-based model is discussed. Also, by comparing the analysis result using this model with previous experimental results, suitability of this analytical model is shown.

In the fire safety design of steel structures, failure of friction type high strength bolted joints is concerned. This paper discusses maximum tensile resistance of friction type high strength bolted joints exposed to fire on the basis of two tensile tests (steady state tests and transient state tests) of the joint. High temperature transient state tests under constant load and increase temperature were conducted in order to investigate the influence of displacement rate on their maximum strength. In case of the transient state tests, the specimen was subjected to the load which was maximum load from the steady state test or from calculation result based on AIJ Recommendation. Load bearing capacity of the joints has been kept over expected critical temperature in case of the transient state tests.

To investigate stress and deformation behavior of steel structure in fire, it is important to consider behavior of friction type high strength bolted joints during not only heating phase but also cooling phase. The purpose of the present paper is to consider stress and deformation behavior of the joints under cooling phase. This paper reports on results of the tensile test after fire, displacement restraint test under cooling phase and numerical study of the restraint test. As a result, in case of the joint which designed to investigate the behavior of tear-out failure, the sufficient deformation capacity was confirmed because of the ductility of the plates with a bolt hole.

In the field of sport, carried out analysis of data against sports-tools and players movement. Above all, the sports use a ball, it is thought that important of ball spin. In this report, we propose an estimation method of ball spin in baseball. Extract seam of ball in moving picture, and estimate detection of spin by using interframe seams movement. By using seams as characteristic, becomes able to detect spin without marker. And we expect that be able to use actual game.