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RISS 인기검색어
- 검색키워드
- 저자 : Menglin Lou (검색결과 3 건)
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Lou, Menglin,Zong, Gang,Niu, Weixin,Chen, Genda,Cheng, Franklin Y. Techno-Press 2006 Structural Engineering and Mechanics, An Int'l Jou Vol.24 No.3
In this paper, the performance of a tuned liquid damper (TLD) in suppressing the seismic response of buildings is investigated with shake table testing of a four-story steel frame model that rests on pile foundation. The model tests were performed in three phases with the steel frame structure alone, the soil and pile foundation system, and the soil-foundation-structure system, respectively. The test results from different phases were compared to study the effect of soil-structure interaction on the efficiency of a TLD in reducing the peak response of the structure. The influence of a TLD on the dynamic response of the pile foundation was investigated as well. Three types of earthquake excitations were considered with different frequency characteristics. Test results indicated that TLD can suppress the peak response of the structure up to 20% regardless of the presence of soils. TLD is also effective in reducing the dynamic responses of pile foundation.
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A modified modal perturbation method for vibration characteristics of non-prismatic Timoshenko beams
Pan, Danguang,Chen, Genda,Lou, Menglin Techno-Press 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.40 No.5
A new perturbation method is introduced to study the undamped free vibration of a non-prismatic Timoshenko beam for its natural frequencies and vibration modes. For simplicity, the natural modes of vibration of its corresponding prismatic Euler-Bernoulli beam with the same length and boundary conditions are used as Ritz base functions with necessary modifications to account for shear strain in the Timoshenko beam. The new method can transform two coupled partial differential equations governing the transverse vibration of the non-prismatic Timoshenko beam into a set of nonlinear algebraic equations. It significantly simplifies the solution process and is applicable to non-prismatic beams with various boundary conditions. Three examples indicated that the new method is more accurate than the previous perturbation methods. It successfully takes into account the effect of shear deformation of Timoshenko beams particularly at the free end of cantilever structures.
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A modified modal perturbation method for vibration characteristics of non-prismatic Timoshenko beams
Danguang Pan,Genda Chen,Menglin Lou 국제구조공학회 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.40 No.5
A new perturbation method is introduced to study the undamped free vibration of a nonprismatic Timoshenko beam for its natural frequencies and vibration modes. For simplicity, the natural modes of vibration of its corresponding prismatic Euler-Bernoulli beam with the same length and boundary conditions are used as Ritz base functions with necessary modifications to account for shear strain in the Timoshenko beam. The new method can transform two coupled partial differential equations governing the transverse vibration of the non-prismatic Timoshenko beam into a set of nonlinear algebraic equations. It significantly simplifies the solution process and is applicable to non-prismatic beams with various boundary conditions. Three examples indicated that the new method is more accurate than the previous perturbation methods. It successfully takes into account the effect of shear deformation of Timoshenko beams particularly at the free end of cantilever structures.
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