|
There are some differences. 3 Series system R / C column horizontal stiffness M () a M. cose ~ one. in song (34) F 『(1 + Ⅳ} c. s a I]\million (36) K eleven r (P 10) on one side of five hundred _ _ = ___ ÷ blow-'37) = Qing iv and - to make equation (38) equal to zero, we can see in the series system R / C column critical load equation and equation (27) the same, ie R / C column in Figure 11 and Figure 12 plots the dimensionless horizontal stiffness K (P) / K (P = O) and the dimensionless pressure p, column and rubber sticks Block pressure p, increases. Figure 11 also can be seen, with a high ratio of rubber bearing columns and H / h increases the level of non-dimensional stiffness, but the critical pressure P equal. As can be seen in Figure 12, with y increasing the level of non-dimensional stiffness decreases, the Pro 4 Series System Series system consists of horizontal stiffness of rubber bearings and the R / C column composed of horizontal stiffness can be calculated (18) and (36) generation type (1),ugg boots sale, after finishing a monk of the later. That is,wholesale PUMA, then the following Chengping Xia, Hui formula for the correct type immeasurable offerings Diego 164 H Vibration Engineering Volume 12,tory burch discount, poisonous one and 3n ? 00.511.522.53 Figure l1 series system level in the column, the dimensionless stiffness and dimensionless pressure relationship (= lO) ¨ Figure l2 series system level in the column, the dimensionless stiffness and dimensionless pressure relationship (: 1O, H / h for a 30) K 【+. s households 1K (P-O) 2 + pTZH + A2cos households + A3sin households jn a = + Zhen {+ + [c + + s]) (+ BU z + a P (39) K (0) = Hui Ru Yu v ) Figure 13 and Figure l4 cut the level of plot the dimensionless degree K (P) / K (P-O) and the dimensionless pressure P, ratio of column height with rubber bearings H / h, 7 the relationship between the Figure can be seen, the dimensionless horizontal stiffness with dimensionless pressure increases. Figure 13 also can be seen, H / h = O ~ 20 level range of the dimensionless stiffness of rubber bearings with the column and the height ratio H / h increases 1. 0.6; 0.2,puma futrue cat, Figure l3 series system of rubber bearings in the non-dimensional horizontal stiffness between the dimensionless pressure (= lO) n Figure 14 the level of series system, the dimensionless relationship between stiffness and dimensionless pressure (= lO, H / h = 30) d △ ● l86420000 2 Zhou Xiyuan et al: plastic bearing rafters with R, c columns in series car shock system 165 decreases the level of stiffness coefficient; H / h within a range of 20 to 50, when a 0.1 y, the dimensionless horizontal stiffness or less, When y a 5.0 degree of non-dimensional horizontal cut rubber bearings with a high ratio of columns and H / h increases with the increase; but the critical pressure. Rubber bearings with a high ratio of columns and H / h independent. As can be seen in Figure 3_4,p90x workout dvds, 7 increases with the level of non-dimensional stiffness decreases, the critical pressure sound. Also reduced. 5 Concluding remarks by the rubber bearings and the R / C columns in series consisting of isolation system, has been applied in practical engineering, but have not seen the level of the corresponding stiffness of the mechanical analysis and calculation. Based on Haringx and Gent approximate theory, the rubber bearings and R / C columns in series mechanical model system, the system shows a series of rubber bearings and R / C column the level of their rigidity and critical load formula and the level of the entire series stiffness calculation system, and the parameters of a preliminary analysis of deposition. In this paper, an analysis of rubber bearings and the R / C columns in series isolation system in engineering applications and provides the basis for design calculations. Architectural Institute of Japan References 1. Structural design of earthquake-free guide (RecommendationoftheDesignotBaseIsolation). Architectural Institute of Japan published. 2 ,1996:29-412 Zhou Xiyuan + Korea 'Sen, who Tak Man and so on. Cavity pad Laminated Column Stability analysis and strength checking. Architecture +1997, (6) :13-193 Tang Jiaxiang, agent and then China. Structural base isolation. Wuhan: Huazhong University Press. 1993:85-924ImbimboM ? KellyJM. Stabilityofisolatorsatlargehorizontaldlsplaeemems. Earthquakespectra, 1997; 13 (3) 415-43O5ImbimboM ? KellyJM. Stabilityaspectsofela
|
评论