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

Abstract

The roof system of Yueqing Gymnasium adopts a new hybrid space structure called the double inner and outer latticed shell string structure. The prestressing construction of this structure is complex. Thus, the whole process analysis for the pretensioning scheme and cable breaking should be performed prior to construction. The tension processes and effects of local component failures were studied on the basis of the structural model test. The effects of the construction sequences of the inner inclined cables and outer radial cables were tested, and the effects of the tensioned outer radial cables were investigated. The analysis and test results show that the internal forces and structural deformations vary linearly during the construction tension processes, and that the structural configuration is stable. The structure can be tensioned to the designed configuration successfully with reasonable construction sequences and programs. Finally, the local component failures of the test model were studied, and the effects of the cable, strut, and sling breakings on structural performance in different positions were discussed. The test results of the cable and strut breaking show that the double inner and outer latticed shell string structure has excellent structural rigidity and has a certain capability for resisting progressive collapse.

An analysis of the elastic-plastic seismic response of inner and outer cable-supported latticed shell structures

“…4 The radial cables pass the latticed shell continuously, extend outward from the roof and are fixed on the top ring beam of the outer ring truss. 5 The increased horizontal angle enables the bottom cable to provide more vertical support stiffness to the top single-layer lattice shell, thus improving the load carrying capacity of the structure. As the cables extend from the roof, the increase in horizontal angle of the radial cables does not increase roof thickness and the visible range of the rear seats in the gymnasium is increased, which can provide more spaces in the interior.…”