Abstract
This paper presents the findings of an experimental investigation on a reinforced concrete frame structure (ordinary moment resistant frame). The test model was subjected to lateral excitation employing the 1994 Northridge earthquake accelerogram. The reinforced concrete test model was fabricated in 1:3 reduced scale acquiring dimensional similarities. The utilized ingredient mix ratio was 1:1.65:1.75 and the water to binder ratio was 0.47. The dynamic characteristics (natural frequency and elastic viscous damping) were calculated using the free vibration record. Story shear, drift, and displacement profiles were drawn using multiple excitation records along with damage patterns and capacity curves. The natural frequency of 2.47Hz was calculated for the test specimen, which is equivalent to 1.41Hz for the prototype. Structural damping (elastic viscous) of 12.36% was calculated for the prototype.
Highlights
The construction growth rate of Reinforced Concrete (RC) buildings is globally increasing
Dynamic characteristics, and damage behavior can be examined for the test model if subjecting it to lateral loads on a shake table [2, 3]
This study was carried on a reduced scale reinforced concrete frame structure, subjected to lateral loads using a shake table
Summary
The construction growth rate of Reinforced Concrete (RC) buildings is globally increasing. Construction/design flaws comprise of poorer quality of concrete (low compressive strength), joints lacking ties, reduced flexural reinforcements in beam and column members, spacing of shear reinforcement larger than those specified in code, and avoiding seismic hooks [3, 8]. Structures built with those deficiencies in high seismic zones are adversely affected by seismicity, leading to disastrous failures and consequent human and economic losses [9,10,11]. The seismic assessment of RC frame structures using shake table reveals the viability of model configuration and material selection and checks the responses of other under-designed and code incompliant specimens [14,15,16]
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