Study on the Nonlinear Stability and Parametric Analysis of a Tensile–Beam Cable Dome

To reveal the stable bearing capacity of a new semi-rigid dome structure, tensile–beam cable (TBCD), detailed numerical simulation and analysis 60 m model TBCD is conducted. Then, effects factors such as prestress level, original imperfection size, distribution, addition hoop tension rods on stability are investigated. The results show that unstable loads arranged from small to large in following order: doubly nonlinearity with an imperfection, geometry without eigen buckling. In this case, nonlinearity, material imperfections must be comprehensively analyzed. mode depends loading form. Torsional buckling overall structure occurs under symmetric load ‘Full live + full dead’, while local out-of-plane appears asymmetric ‘Half dead’. With 2–3 times integrations, innermost beams change stretch bending pressurized bending, which causes become unstable. A level clearly decreases TBCD, relatively has little effect. When greater than 1/400 span, problematic. Comprehensively considering impact multiple defects needed when analyzing TBCD. Adding between top ends can effectively improve integrity