Study The Influence of Grid-Jumping Layout on Spatial Calbe-Truss Structure Wihtout Inner Ring Cables with Rupture of Local Cables (Struts)

IF 1.1 Q3 ENGINEERING, CIVIL
Jian Lu, S. Xue, X. Li
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引用次数: 0

Abstract

Spatial cable-truss structure without inner ring cables (SCSWIRC) is a new type of cable-truss tension structures (CTTS), and its anti-collapse ability is strong, but its construction forming is difficult. The main reason is that there are a lot of struts (or compression struts) when the span of SCSWIRC is larger and struts are easy to cause winding and collision during its construction. In order to solve the difficulty of construction forming, the grid-jumping layout was proposed to simplify SCSWIRC to delete the redundant struts. It is necessary to further study whether the anti-collapse ability of the remaining structure after the grid-jumping layout is affected by grid-jumping layout. Based on transient dynamic theory, the rupture of local cables (struts) of SCSWIRC with grid-jumping layout is studied. The research results show that self-weight has a little influence on the SCSWIRC; the initial prestress only increases the internal forces of components and the same proportion of feasible prestress levels do not amplify the response of SCSWIRC with rupture of local cables (struts); the anti-collapse ability of the remaining structure after the grid-jumping layout of SCSWIRC is still strong and the ability to resist the external loads is good at the same time. The rupture of local cables (struts) for the original scheme and grid-jumping layout schemes do not cause the progressive collapse. The research contents offer useful reference for the safety design of SCSWIRC.
跳网布置对局部索(杆)断裂无内环索空间索桁架结构的影响研究
无内圈索空间索桁架结构(scswrc)是一种新型的索桁架张力结构(CTTS),其抗倒塌能力强,但施工成形困难。究其原因,主要是scswc在跨度较大时存在较多的支板(或压杆),在施工过程中支板容易产生缠绕和碰撞。为解决结构成形难的问题,提出了跳格布局,对scswc结构进行简化,删除冗余支板。跳格布置后剩余结构的抗倒塌能力是否受到跳格布置的影响还需要进一步研究。基于瞬态动力理论,研究了跳网布置的scswc局部索(杆)的断裂问题。研究结果表明:自重对scswc的影响较小;初始预应力只增加了构件的内力,相同比例的可行预应力水平并没有放大scswc局部索(杆)断裂的响应;scswc跳网布置后的剩余结构抗倒塌能力仍然较强,同时抗外荷载能力较好。原方案和跳网布置方案的局部索(支)杆断裂均未引起连续垮塌。研究内容为scswc的安全设计提供了有益的参考。
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来源期刊
CiteScore
1.40
自引率
0.00%
发文量
17
期刊介绍: The Association publishes an international journal, the Journal of the IASS, four times yearly, in print (ISSN 1028-365X) and on-line (ISSN 1996-9015). The months of publication are March, June, September and December. Occasional extra electronic-only issues are included in the on-line version. From this page you can access one or more issues -- a sample issue if you are not logged into the members-only portion of the site, or the current issue and several back issues if you are logged in as a member. For any issue that you can view, you can download articles as .pdf files.
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