Seismic damage assessment of an E-defense tested steel moment-resisting frame using hierarchical Bayesian model updating
This paper presents a hierarchical Bayesian model updating method for seismic damage assessment of steel moment-resisting frames(SMRFs)using measured acceleration responses of floors.Firstly,a probabilistic updating method for assessing seismic damage to beam-column connections in SMRFs is proposed based on hierarchical Bayesian inference.In Bayesian model updating,fishbone model where all beams at a floor are modelled with a rotational spring and all columns of a story are condensed into a representative column is used.The model parameters are updated from modal data including natural frequencies and translational components of mode shapes of dominant modes.Then,the proposed method is experimentally investigated using a full-scale steel moment-resisting frame test at the EDefense shaking table facilities.The E-Defense test specimen represented general high-rise steel buildings in Japan and experienced various damages to beam-column connections such as local buckling,fracture and cracks of concrete slabs under severe seismic loadings.Seismic damages at beam-column connections in the test specimen are quantitatively evaluated from a comparative study of the identified stiffness of rotational springs in fishbone model before and after earthquakes.The consistency of damage estimation results with observation of seismic damages demonstrates the effectiveness of the proposed probabilistic updating method.
damage estimation hierarchical Bayesian inference fishbone model E-Defense test seismic damage
X.Li M.Kurata
School of Civil Engineering,Chongqing University,Chongqing,China Disaster Prevention Research Institute,Kyoto University,Uji,Japan
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1850-1859
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）