• Journal of the Earthquake Engineering Society of Korea
• /
• v.7 no.1
• /
• pp.31-40
• /
• 2003

Due to the random nature of earthquake, the definition of the input excitation is one of the major uncertainties in the seismic response analysis. Furthermore, ground motions that correspond to a limited number of design parameters are not unique. Consequently, a brood range of response values can be obtained even with a set of motions, which match the same target parameters. The paper presents a practical probabilistic approach that can be used to systematically model the stochastic nature of seismic loading. The new approach is based on energy-based RMS hazard and takes account for the uncertainties of key ground motion parameters. The simulations indicate that the new RMS procedure is particularly useful for the rigorous probabilistic seismic response analysis, since the procedure is suitable for generation of large number of hazard-compatible motions, unlike the conventional procedure that aim to generate a small number of motions.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.41 no.6
• /
• pp.561-566
• /
• 2017

The weight reduction design process of tension links could be studied based on the variation of tension, bending and torsional stiffness after substituting STKM11A steels with aluminum alloys (A356) with tensile strength of 245 MPa. The existed I-beam type link component may have a weak point for loads applied from a special direction. Therefore, it was investigated to the optimal shape of the link component that could withstand loads from all directions and at the same time reduce weight. Various types of link shapes were designed and analyzed, and the optimized shape was found. The optimized design can reduce over 40% of the original steel link weight, and it could be suggested for light-weight design guides and safe design conditions for the development of tension links.