Abstract
Abstract In this paper, a new type of structure was introduced. The spatial steel grid structure was composed of the top layer, lower layer H-shaped steel ribs and square steel tubes. The shear key is the key part of the structure.Based on the real dimensions of a practical prototype,two sets of full-scale shear key specimens were made, one of which has vertical stiffening ribs. The loading tests of two groups of specimens were carried out to simulate cases under pure shears and the experimental results were compared with the simulations from the finite element analysis. The effects of vertical stiffeners on failure modes, ultimate loads, strength-yield ratio and ductility of shear key were studied through experiments. By parametric analyses in the present article, relations of the stiffening plates width and thickness was recommended.
Highlights
With the decreases of cultivated lands and the shortage of urban lands, the demands for large-span and multi-storey buildings with small constructional depths are dramatically increasing
Significantly affect the overall height of the building (De Silva & Thambiratnam 2009; Da Silva et al 2003; El-Dardiry & Ji 2005). It is a trend for building structures to reduce the floor height by adopting new floor structures
2.1 Test Specimens This experiment is based on a practical project of a steel grid hospital building; two sets of full-scale shear key model are designed according to the sizes of the building
Summary
With the decreases of cultivated lands and the shortage of urban lands, the demands for large-span and multi-storey buildings with small constructional depths are dramatically increasing. The long-span space steel grid structure is alternative in order to solve such problems. This type of structures provides appealing benefits in terms of construction costs such as large spanning capabilities with minimal materials, small floor heights, fast constructions, and the advantages offered by ordinary composite beam constructions The long-span space steel grid structure is suitable for multi-storey, high-rise and long-span industrial and public buildings. It has been applied in many projects (Shang et al 2018b) (Fig. 1). The investigations can provide technical supports for the engineering application, and have important theoretical and practical significance
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