5, : [3 ] :,,, [4 ] [5 ], CQC A R [6 ], [7 ] [8 ], [9210 ],,,, (1) Cvgu, (2), M u + Cgu + Ku = P( t) (1) M u + Cgu + Cvgu + Ku = P( t) (

Transcription

1 31 5 Vol. 31 No Journal of Civil, Architect ural & Environmental Engineering Oct a,b, a,b, a, a,b ( a., ; b., ) :, WIND H IST V2. 0,, : : ; ; ; ; ; ; ; : TU ; TU :A : (2009) Wind2induced Response Analysis on a Connected Tall Building Structure with Viscous Damper CHEN Xue2wei a, b, HAN Xiao2lei a, b, MAO Gui2niu a, J I Jing a, b (a. Tall Building Structure Research Institute ; b. State Key Laboratory of Subtropical Architecture Science, South China University of Technology, Guangzhou , P. R. China) Abstract : The control effect s of a connected tall building struct ure wit h viscous damper in several respect s were st udied, such as internal force, deformatio n, acceleratio n and energy under dynamic wind load. Firstly, wind pressure time2history data were obtained f rom t he wind2t unnel test of the struct ure model, and t hen a wind load processing program WIND H IST V2. 0 based on wind tunnel test was developed, by which wind pressure data processed and inp utted into Finite Element Met hod ( FEM) program. Thus wind2 induced vibration time2history could be analysed under various working conditions. It was shown t hat bot h the internal force and deformation of the connected struct ure wit h viscous damper can be decreased, while the effect of t he former was more obvious t han t he latter. The acceleration at t he top of the connected struct ure caused by dynamic response of fluctuating wind can be controlled effectively by viscous damper. Key words : st ruct ures ; dynamic loads ; wind engineering ; time2do main analysis ; visco us damper ; tall building ; wind t unnel test ; wind2induced response, [ 1 ], z, z,, [2 ] : :(C708086z) : (19832),,,, ( E2mail) com. cn

2 5, : [3 ] :,,, [4 ] [5 ], CQC A R [6 ], [7 ] [8 ], [9210 ],,,, (1) Cvgu, (2), M u + Cgu + Ku = P( t) (1) M u + Cgu + Cvgu + Ku = P( t) (2) K ; C ; M ; gu u P( t), E. L. Wilson [11 ] ( FNA) [12 ],,, 1. 2 : 1),,, 2), :, ;,, 3) : 4),, 2. 1 [13 ] m, 120 m 4 ;, 1,,, 2, 12, : C = kn/ ( m/ s), = 0. 4 ; 22, : C = kn/ (m/ s), = : s s s s 1 2

3 [ 14 ],, ( ), 3 1/ , , 313 Hz s B, 0. 16, kpa, Cpi : Cpi = Pi - P P0 - P (3) Cpi i, Pi i, P0 P (4) Fi = w i A i = Cpi w r = Cpi w (4) Fi i, w i i, w r, A i, w0,,,, (4),,, 3 ISO : 30 m [1 ],,,,, 3,, 0. 8 m, 4 Fx = - w r H cos C p ds (5) L Fy = - w r H sin C p ds (6) L M z = - w r H ( xsin - ycos ) Cp ds (7) L, Fx Fy M z x, y z, H, Delp hi [15 ] WIND HIST V2. 0 5,,, 1/ m 6

4 5, : [16 ], 3 : (8) 5 = Ruc - Rave Rc - Rave 100 % (8),, Ruc, Rave, Rc,,, 8 120, y ;,, y %, x % CSI ETABS ( FNA ), 40, %, ,, 0. 01, 30, x, y , y ;

5 78 31,, y %, x % 1, 2 70 %, 10, / 2 / kn m / / / / kn m kn m kn m kn m % % % % % % % % % % % % 1 x y / x y % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 10 0, 11 11, y, y, 90 %, x 50 %

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