Journal of Jilin University(Engineering and Technology Edition) ›› 2020, Vol. 50 ›› Issue (5): 1687-1697.doi: 10.13229/j.cnki.jdxbgxb20190589

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Influence of grid⁃jumping arrangement on static and dynamic performance of annular crossed cable⁃truss structure

Su-duo XUE1(),Jian LU1,Xiong-yan LI1,Ren-jie LIU2   

  1. 1.College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
    2.School of Civil Engineering, Yantai University, Yantai 264000, China
  • Received:2019-06-13 Online:2020-09-01 Published:2020-09-16

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Abstract:

Based on ACCTS, the features of ACCTS were firstly described in detail. Secondly, three arrangement schemes of struts grid-jumping were proposed, which were compared with the original scheme in terms of pre-stress distribution, load condition, buckling resistance, steel consumption and so on, and the optimal grid-jumping order was determined. Finally, based on the optimal scheme and original scheme, the static and dynamic performances of two schemes were systematically comparatively studied. The research results show that under the condition that the static and dynamic performances of the original structure are unchanged, the optimal scheme after grid-jumping not only saves the amount of steel and improves the anti-buckling ability of the structure, but also simplifies structure system and reduces the construction difficulty by means of grid-jumping optimization. This research can promote the application of ACCTS in practical engineering.

Key words: civil engineering, annular crossed cable-truss structure, grid-jumping, load analysis, steel consumption, static and dynamic performance

CLC Number: 

  • TU394

Fig.1

Sketch of evolution process of ACCTS"

Fig.2

Spoke structure"

Table 1

Prestress distribution of all kinds of components of ACCTS"

参数XS1XS2XS3XS4XS5SS1SS2SS3SS4SS5B1B2B3B4

面积/

mm2

1360.91360.91360.91360.91360.91360.91360.91360.91360.91360.93078.73078.73078.73078.7
内力(无自重)/kN240.00240.25240.88242.12245.20348.31348.48348.94349.80351.91-36.97-22.89-17.72-22.62
内力(有自重)/kN270.86271.26271.96273.36276.84327.23327.39327.68328.39330.38-38.23-23.62-18.26-23.32

Fig.3

Perspective of ACCTS"

Fig.4

Sketch of half cable truss frame"

Fig.5

Plane diagram of strut grid-jumping"

Fig.6

Shape changes of cables before and after grid-jumping"

Fig.7

Comparative results of feasible prestress distribution of three grid-jumping schemes within self-weight or not"

Table 2

Feasible prestress distribution of structures within self-weight"

单元编号原方案方案1方案2方案3
XS1270.86266.73270.49272.20
XS2271.26267.18270.94272.63
XS3271.96267.39272.18273.34
XS4273.36269.06272.37276.40
XS5276.84272.51276.45276.77
SS1327.23329.52333.08332.02
SS2327.39326.73333.21332.17
SS3327.68329.21334.05332.46
SS4328.39329.52333.86334.57
SS5330.38331.47336.29334.28
B1-38.23-37.93-48.57—
B2-23.62-31.69—-47.68
B3-18.26—-32.13-18.43
B4-23.32-33.07-23.48-23.53

Table 3

Comparative results of structural response of original scheme and three grid-jumping schemes"

类别及位置原方案方案1方案2方案3
拉索最大值/kN524.59521.9528.39544.25
位置XS5XS5XS5XS5
拉索最小值/kN195.50198.63207.98228.58
位置SS1SS1SS1SS1
压杆最大值/kN-10.67-14.52-19.09-13.94
位置内环2虚拟环虚拟环虚拟环
压杆最小值/kN-20.37-27.00-21.26-22.85
位置虚拟环内环3内环1内环1
Z向最大位移/m-0.356-0.354-0.489-0.679
位置内环3内环3内环2内环3

Fig.8

Internal force of original scheme and three grid-jumping schemes"

Table 4

Amount of steel of original scheme and three grid-jumping schemes"

类别原方案方案1方案2方案3
总重量/t39.1336.00736.36937.144
节省的用钢量/t—3.1232.7611.986
百分比/%—8.007.055.07

Table 5

Buckling loads of original scheme and three grid-jumping schemes"

类别原方案方案1方案2方案3
无自重屈曲荷载/kN4536453644544446
有自重屈曲荷载/kN4266442842844158

Fig.9

Relationship of internal force and node displacement of original scheme and scheme 1 under full-span loads"

Fig.10

Relationship of internal force and node displacement of original scheme and scheme 1 under half-span loads"

Table 6

Effects of prestress on structural buckling loads"

预应力等级原方案/kN方案1/kN
0.8P32583442
1.0P42664428
1.2P52925468
1.4P63906561

Fig.11

Relationship of internal force and node displacement of original scheme and scheme 1 under different prestress"

Fig.12

First 6 order frequencies and vibration modes of original scheme (10 times deformation)"

Fig.13

First 6 order frequencies and vibration modes of scheme 1 (10 times deformation)"

Table 7

First 6 order frequencies of original scheme and scheme 1"

阶数频率/Hz振型
原方案方案1原方案/方案1
第1阶1.7331.796两向正对称上下振动
第2阶1.7331.796两向正对称上下振动
第3阶2.0492.157整体上下振动
第4阶2.0722.180三向反对称上下振动
第5阶2.0722.180三向反对称上下振动
第6阶2.1142.251整体反对称上下振动
第7阶2.1142.251整体反对称上下振动

Fig.14

Trend chart of first 100 order frequencies of original scheme and scheme 1"

Fig.15

Relationship of frequency and prestress"

Fig.16

Relationship of frequency and external load"

Fig.17

Relationship of frequency and section of cable and strut"

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