1 rpc support structure w.l.wang, j.y.fu, w.y.song july 05, 2007
Post on 20-Dec-2015
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4
Units and sections
二、 Direction orthogonal to the rail : ( Far jall ) Each unit is composed of 2 – 3 sections:
1). 6m + 12m
2). 6m + 6m + 6m
一、 Direction along the rail :( Far hall ) Composed of 5 – 6 units : 1). Four 4m x 18m units, one 2m x 18m unit 2). Six 3m x 18m units
5
Unit (far hall 18m x 18m)
4m x 18m 单元2m x 18m 单元
( far hall ) Support sructure are composed of 5 units : One 2m x 18m unit , Four 4m x 18m units
6
Deformation calculation ( 1 )
1. Far hall 主梁选用热轧 H 型钢: HM350X250 H-beam Length 18m Weight of Support Structure 36t Weight of RPC 21t Single H-beam deformation calculation (Suppor
ted by two ends) : Y = -
EI
ql
384
5 4
max
7
Y -最大挠度, mm q -均布载荷, q = 0.797N/mm L -主梁长度, L= 18000mm E -弹性模量, E = 206 GPa I -惯性矩, I =
Y = - = - 24.37mm
Single H-beam deformation calculation (Supported by two ends) :
Y = -
85
4
10^17.2^10^06.2^384
18000^797.0^5
85
4
10^17.2^10^06.2^384
18000)^65.0797.0(^5 = - 44.25mm
4810^17.2 mm
梁与梁在横向没有连接的情况下,最大变形 44.25mm 。
8
由 H 型钢组成的支撑结构变形计算( 2 )
2. Near hall 主梁选用热轧 H 型钢: HM300X200 H beam Length 12m Weigh of Support Structure 20t Weight of RPC 14t 单根主梁自重变形按照两端简支计算:
Y = -
EI
ql
384
5 4
max
9
Y -最大挠度, mm q -均布载荷, q = 0.573N/mm L -主梁长度, L= 12000mm E -弹性模量, E = 206 GPa I -惯性矩, I =
Y = - = - 6.59mm
单根主梁加上 RPC 及其定位、固定装置之后的变形:
Y = - 85
4
10^14.1^10^06.2^384
12000)^65.0573.0(^5
85
4
10^14.1^10^06.2^384
12000^573.0^5
= - 14.06mm
4810^14.1 mm
max
梁与梁在横向没有连接的情况下,最大变形 14.06mm 。
20
Comparison of the two Structures
• The H-beam is more simple
• The truss structure might be light than the H-beam structure
• But the welding of so many tiny structure is not easy, therefore it is not strong.
• and the production cost will be higher
• Normally it is used for the height above 1.5m
21
Conclusions• Basically the H-beam structure are fixed. The
distance between two adjacent H-beams is ~1m.• Right now, the deformation/length =
44mm/18000mm = 1:400 is proper for the design, but consider all the H-beams are joined together, the deformation will be smaller than the single beam calculation, more optimization will be going.
• Will investigate the production, transportation, assembly and so on.