http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : M. Helen Santhi (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Evaluation of seismic response of soft-storey infilled frames
M. Helen Santhi,G. M. Samuel Knight,K. Muthumani 한국계산역학회 2005 Computers and Concrete, An International Journal Vol.2 No.6
In this study two single-bay, three-storey space frames, one with brick masonry infill in the second and third floors representing a soft-storey frame and the other without infill were designed and their 1:3 scale models were constructed according to non-seismic detailing and the similitude law. The models were excited with an intensity of earthquake motion as specified in the form of response spectrum in Indian seismic code IS 1893-2002 using a shake table. The seismic responses of the soft-storey frame such as fundamental frequency, mode shape, base shear and stiffness were compared with that of the bare frame. It was observed that the presence of open ground floor in the soft-storey infilled frame reduced the natural frequency by 30%. The shear demand in the soft-storey frame was found to be more than two and a half times greater than that in the bare frame. From the mode shape it was found that, the bare frame vibrated in the flexure mode whereas the soft-storey frame vibrated in the shear mode. The frames were tested to failure and the damaged soft-storey frame was retrofitted with concrete jacketing and, subjected to same earthquake motions as the original frames. Pushover analysis was carried out using the software package SAP 2000 to validate the test results. The performance point was obtained for all the frames under study, therefore the frames were found to be adequate for gravity loads and moderate earthquakes. It was concluded that the global nonlinear seismic response of reinforced concrete frames with masonry infill can be adequately simulated using static nonlinear pushover analysis.
-
Extended End Plate Long Bolted Joint Using Cold Formed Steel Hollow and Concrete Filled Column
M. SenthilPandian,M. Helen Santhi,Baskar Gopalan 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.2
The objective of this study is to investigate the moment-rotation behaviour of the extended end plate long bolted moment connection using numerical, experimental and component method approaches. Totally thirty six models of the cold formed steel beam-column (hollow and concrete fi lled column) connection with diff erent arrangement of long bolts are modeled and analysed using the fi nite element software ANSYS APDL. The cross-sectional dimension of the column and beam section is 50 mm × 100 mm × 2 mm. The length of column and beam section is 900 mm and 700 mm, respectively. The end plate size is 100 mm × 150 mm × 2.5 mm/4.0 mm and 6 mm diameter long bolts are used to connect the members in the joint. It is observed that the increase in the number of bolts increases the initial rotational stiff ness and design moment capacity of the connections signifi cantly. Substantial enhancement in the initial rotational stiff ness and design moment capacity of the connection is achieved by using concrete fi ll in the column. From the experimental validation, it is noticed that the fi nite element models satisfactorily predict the actual behaviour of the extended end plate bolted moment connections. Also the initial rotational stiff ness of the connections is determined based on the component method as specifi ed in Euro Code 3(BS EN 1993-1-1 2005 , BS EN 1993-1-8 2005 ) and the results indicate that the predictions based on the proposed analytical model agree well with the simulation model.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
