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The assessment of existing masonry towers under exceptional loads, such as earthquake loads,\udrequires reliable, expedite and efficient methods of analysis. These approaches should take into account both\udthe randomness that affects the masonry properties (in some cases also the distribution of the elastic\udparameters) and, of course, the nonlinear behavior of masonry. Considering the need of simplified but effective\udmethods to assess the seismic response of such structures, the paper proposes an efficient approach for seismic\udassessment of masonry towers assuming the material properties as a stochastic field. As a prototype of masonry\udtowers a cantilever beam is analyzed assuming that the first modal shape governs the structural motion. With\udthis hypothesis a nonlinear hysteretic Bouc & Wen model is employed to reproduce the system response which\udis subsequently employed to evaluate the response bounds. The results of the simplified approach are compared\udwith the results of a finite element model to show the effectiveness of the method

An efficient Bouc & Wen approach for seismic analysis of masonry tower