Response control of adjoining structures interconnected with Lead damper

Abstract

Considering the linked structure concept, a single damper enhances the response of two adjoining structures, becomes an economic alternative for seismic performance enhancement of the adjoining connected structure. A high force-to-volume damper offers a sufficient amount of resistive force by comparatively small size device, which is more suitable application for space-restricted situation. The seismic ground motion excitation is random in nature. The seismic behavior of the structure depends on attributes of the structural system and ground excitation. The random response analysis gives a more appropriate estimation of functioning of the control device and structure. The performance of lead damper linking two adjoining single-degree-of-freedom structures subjected to non-stationary and stationary random excitations is studied. The efficacy of lead damper is evaluated by analyzing the adjoining interconnected structures applying 500 ground excitation realizations using Monte Carlo simulation. The act upon of quantities like damper constant, frequency ratio and a mass ratio of linked structure on the functioning of interconnected structure is inquired. The results indicate that lead damper with appropriate parameter is effective for response enhancement of adjoining coupled structure. The closed-form formula for optimal damper constant and the corresponding mean square response of undamped interconnected structures considering stationary excitations with uniform modulating function are derived.