Abstract
Suspension-cable truss composite structure is a new type of cable-strut structure which combines the conventional cable structure with the rigid truss. By laying rigid roofing slabs, this composite structure offsets most effect of the wind suction, reduces the axial force of the stable cables, and reduces the large vertical displacement effectively when compared with conventional cable trusses. For this new structure, the deformation relevance between adjacent substructures results in a nonindependent and stable union. To effectively and precisely find the cable forces of a suspension-cable truss composite structure for the construction completion state, a proper optimization order and a suitable selection of the substructures are necessary. In this paper, the structural mechanical characteristics of the suspension-cable truss composite structure are introduced at first, to reveal the force transmission path between adjacent substructures. Secondly, the cumulative expansion force-finding method (CEFM) is proposed to obtain the optimal mode of the cable force distribution with a suitable operational efficiency. A numerical example is introduced and analyzed to verify the accuracy and feasibility of this method afterwards. The results show that CEFM could find out the optimal cable force distribution of the suspension-cable truss composite structure, with a geometry shape of whole structure and a rational stress level of all the components.
Highlights
Suspension-cable truss composite structure is a new type of cable-strut structure which combines the conventional cable structure with the rigid truss
If pretension forces of the cables have been built in advance, a relatively larger overall stiffness will be established in the cable-strut system, which will reduce the overall displacement of the overall structure. erefore, the static response of a cable truss is in Advances in Civil Engineering (a) some means determined by the prestress level of the bottom cable-strut system
A new method of force finding called the cumulative expansion force-finding method is proposed for the new type suspension-cable truss composite structure
Summary
According to the characteristics mentioned above, deformation of each substructure of SCTCS will influence other ones, which means that there is not a single independent and stable substructure for the SCTCS. En, carry out nonlinear finite element analysis to obtain the target response value of the substructure, which is compared with the convergence conditions set in advance, as shown in equation (3). En, carry out nonlinear finite element analysis to obtain the target response value of the substructure Uki. If Uki meets the convergence condition expressed by equation (4), the target initial equilibrium cable force distribution of the k substructure ΔTk ΔTik. If not, the (k + 1) step of iteration is started. After the iterative force finding of all substructures, the nonlinear finite element solution of the whole structure is carried out to obtain a group of balanced cable forces, which is the objective initial balanced cable force distribution that we have been seeking for
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
