The simplified method of along-wind response of lattice transmission tower based on field test

Abstract

Lattice transmission tower is an important lifeline project. This kind of structure is sensitive to wind load. The wind load is the main lateral load. The scholars in the world mainly research on the along-wind response of the structure based on strip theory and quasi-stability theory. However, the force spectrum based on quasi-stability theory is different from that obtained by the field test and the wind tunnel test, which make large discrepancy on the along-wind response result. In this paper, a simplified method to model the along-wind response of a structure based on field test results is discussed. The simplified method is based on the fundamental mode generalized force spectrum (FMGFS) model and the frequency-domain method. The MATLAB soft is available to calculate the root-mean-square (RMS) of acceleration. It is concluded that the RMS value from the simplified method is very approached to that obtained by the field test. The deviation is controlled in 5%, which means the simplified method is an effective method.