• Wind and Structures
• /
• 제14권3호
• /
• pp.239-252
• /
• 2011

The wind-induced mean, background and resonant responses of Beijing National Stadium are investigated in this paper. Based on the concepts of potential and kinetic energies, the mode participation factors for the background and the resonant components are presented and the dominant modes are identified. The coupling effect between different modes of the resonant response and the coupling effect between the background and resonant responses are analyzed. The coupling effects between the background and resonant components and between different modes are found all negligible. The mean response is approximately analogous to the peak responses induced by the fluctuating wind. The background responses are significant in the fluctuating responses and it is much larger than the resonant responses at the measurement locations.

• Steel and Composite Structures
• /
• 제46권2호
• /
• pp.221-236
• /
• 2023

In order to study the seismic response of the main plant of steel reinforced concrete (SRC) structure of the CAP1400 nuclear power plant under the influence of different high-mode vibration, the 1/7 model structure was manufactured and its dynamic characteristics was tested. Secondly, the finite element model of SRC frame-bent structure was established, the seismic response was analyzed by mode-superposition response spectrum method. Taking the combination result of the 500 vibration modes as the standard, the error of the base reactions, inter-story drift, bending moment and shear of different modes were calculated. Then, based on the results, the influence of high-mode vibration on the seismic response of the SRC frame-bent structure of the main plant was analyzed. The results show that when the 34 vibration modes were intercepted, the mass participation coefficient of the vertical and horizontal vibration mode was above 90%, which can meet the requirements of design code. There is a large error between the seismic response calculated by the 34 and 500 vibration modes, and the error decreases as the number of modes increases. When 60 modes were selected, the error can be reduced to about 1%. The error of the maximum bottom moment of the bottom column appeared in the position of the bent column. Finally, according to the characteristics of the seismic influence coefficient αj of each mode, the mode contribution coefficient γj•Xji was defined to reflect the contribution of each mode to the seismic action.

• 대한교통학회지
• /
• 제28권2호
• /
• pp.171-181
• /
• 2010

2007년 7월부터 시행되고 있는 수도권 대중교통 통합요금제는 이용자의 통행비용 절감 및 활발한 환승행위의 유도로 긍정적인 평가를 얻고 있다. 그러나 수도권 대중교통 통합요금제를 고려한 철도 수요예측 방법론, 특히 수단분담과 관련된 연구가 많지 않았다. 이에 본 연구는 수도권 대중교통 통합요금제를 반영할 수 있는 수단별 효용산정기법을 제시하였으며, 2006년 가구통행실태조사 자료를 활용하여 통행시간과 통행비용 산정에 적용되는 계수를 현실화하였다. 그리고 다양한 요금제를 적용하기 위한 철도 수요예측 방법론을 제시하였다. 본 연구에서 제시한 철도 수요예측 방법론은 철도 수요예측의 정확성과 유용성을 향상시키는데 기여할 수 있을 것으로 기대된다.