Abstract
Pounding of two adjacent structures is one of the factors that cause damage and hinder sustainable use of reinforced concrete (RC) frame structures under strong ground motion excitations. This study developed a pounding analysis method with a refined beam-column element in order to solve the pounding problem between two RC frame structures. The analysis method combines the fiber beam-column element model with the element sections discretized into concrete and longitudinal rebar fibers, the Hertz-damp contact element model to describe the pounding between beam-column elements, and the method to integrate the pounding force into the system dynamic equilibrium equation. The pounding can be considered either at the level between the story slab to slab or at the level between story slab to mid-column. The application of the proposed method in pounding analyses to provide a rational seismic separation gap between two adjacent RC frame structures is finally conducted to increase their safety and sustainability under strong earthquakes.
Highlights
The damage of structures in strong earthquakes causes economic loss, casualties and downtime
The pounding becomes the source of local damages and in some cases it may even lead to collapse of the structures
multi-degree of freedom (MDOF) systems to represent the isolated structures were used by some researchers [18,19,20,21,22,23] in order to studied the earthquake-induced poundings of seismically isolated buildings with adjacent structures
Summary
The damage of structures in strong earthquakes causes economic loss, casualties and downtime. MDOF systems to represent the isolated structures were used by some researchers [18,19,20,21,22,23] in order to studied the earthquake-induced poundings of seismically isolated buildings with adjacent structures. Chujo et al [27] studied the seismic pounding of adjacent RC structures damaged in 1985 Mexico earthquake, in which they used the beam-column elements with a linear viscoelastic pounding model. In practical applications of pounding analyses, a seismic separation gap is commonly set between two adjacent structures in order to avoid pounding damage in earthquakes. A fiber beam-column element model and analysis method that can consider the pounding is firstly developed, the proposed method is used in pounding analyses for providing a rational seismic separation gap between two adjacent RC frames
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