Time-dependent analysis of cable nets using a modified nonlinear force-density method and creep theory

Abstract The stiffness of cable nets is conditioned by their states of prestress. The decrease of prestress due to creep of cables determines the serviceability and load bearing capacity of the cable net. In this paper, a modified force density method for a time-dependent non-linear static analysis of pre-stressed cable nets based on the application of creep theory is presented. Creep constitutive equations are directly used for the adjustment of cable lengths. The accuracy and efficiency of the formulation are assessed by comparison with available results obtained by other authors using different numerical approaches. The applicability of this method is demonstrated.

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