Use tension-only elements to model and analyze the structure of steel monopole with tieback cables
Keywords:Steel monopole, tieback cable, tension-only element, Tower software
Steel monopole with tieback cables is the commonly used structure in Vietnam as well as in the world. In classical analysis models, tieback cables were modeled by tension-compression bar elements with equivalent axial stiffness, considering the deflection of the cable caused by self-weight. The results of these models did not reflect the actual working properties of structures and the physical nature of the problem. This article proposes a bar element model (only tension without pretension) to model a tieback cable structure. Numerical experiment results for a steel monopole with non-pretension tieback cables show considerable differences of displacements and internal forces between the proposed model and the classical model.