Shape Determination and Static Experimental Study of Double Inner and Outer Latticed Shell String Structure

Abstract

A new type of space structure called the double inner and outer latticed shell string structure, which can reduce the space occupied by the roof and be laid easily using a rigid roofing material, is proposed. Numerical algorithm for shape determination of this new space structure is introduced and some suggestions for improvement are put forward. One example is investigated and the results confirm the validity of the above method. Finally, a model experiment based on a practical engineering application is introduced. Experimental results are compared with those of the finite element numerical analysis and results show that the theoretical value and the experimental value match well, which reveals that the model design, loading scheme and measuring plan meets experimental requirements. The internal forces and the structure deformation vary linearly for full span load cases, which reveals that the double inner and outer latticed shell string structure has an excellent load-carrying capacity and structural rigidity, and has broad application prospects.

Experimental study on construction tension and local component failure of double inner and outer latticed shell string structure

“…This spatial latticed shell string structure can be considered a hybrid structure composed of a single-layer lattice shell and a cable-strut structure. The entire hybrid structure is supported by V-shaped columns (Figures 4 and 5) (Yao et al, 2013).…”

“…The design of the model nodes consists of foundation nodes, partial nodes of the upper latticed shell, (Yao et al, 2013). Table 1.…”

“…The size of prestresses and the selection of construction method are the key factors for structural design and construction (Kang et al, 2003;Kitipornchai et al, 2005). Therefore, model tests are needed to confirm whether structural properties can meet design requirements (mainly the size and distribution of pre-stresses) (Liu et al, 2015;Yao et al, 2013). The key construction issues for the double inner and outer latticed shell string structure include building the initial pre-stresses in accordance with the design requirements, which depends on reasonable tension schemes.…”

“…Model tests and numerical analyses can be helpful to address the above problems (Dong et al, 2011;Kahla and Moussa, 2002;Shekastehband et al, 2014;Zhu et al, 2013). The structural static performances of the double inner and outer latticed shell string structure had been studied in the document by Yao et al (2013) with the same scale model. Before the static test, the test model needed to be constructed.…”

“…Before the static test, the test model needed to be constructed. Given the space limitation, the model tests of tension processes were not studied in Yao et al (2013).…”