Influences of brackets on aseismic performance of steel eave columns in an imitated ancient building

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (19) : 245-253.

XUE Jianyang1, MA Linlin1, DONG Jinshuang1, GAO Weixin1

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Abstract

In order to investigate influences of brackets on mechanical performance of steel eave columns in an imitated ancient building, eight specimens of steel eave columns and brackets in an imitated ancient building with the scale of 1/1.5 were tested under low-cyclic repeated loading.On base of obtaining load-displacement hysteresis loops and skeleton curves of specimens, their rigidity degradation, strength decay, ductility, energy-dissipating capacity and failure mechanism were analyzed.The results showed that brackets not only change steel eave columns’ force transfer mechanism, but also affect their aseismic performance significantly; their yield and ultimate force-bearing capacity increase by 30.7% and 24.0%, respectively; their rigidities at yield point and ultimate one increase by 52.8% and 135.6%, respectively; the energy-dissipating capacity of eave columns with brackets at yield point is obviously higher than that of common eave columns, but the ductility of eaves column with brackets slightly decreases by average 8.5%.The finite element model for eave columns in imitated ancient building was established with the software ABAQUS based on the test study.The parametric analysis for influences of the thickness-width ratio of Ludou on eave columns’ aseismic performance was done.The results showed that with increase in the thickness-width ratio of Ludou within a certain range, the rigidity and strength of ease columns with brackets increase, while their displacement ductility decreases to a certain extent; the rigidity and force-bearing capacity of eave columns with brackets firstly increase and then decrease, when the thickness-width ratio of Ludou is within a range of 0.011—0.015, their rate of increase in the rigidity and force-bearing capacity is the maximum.

Key words

imitated ancient building / brackets / eave columns / low cyclic reversed loading / seismic performance

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XUE Jianyang1, MA Linlin1, DONG Jinshuang1, GAO Weixin1. Influences of brackets on aseismic performance of steel eave columns in an imitated ancient building[J]. Journal of Vibration and Shock, 2018, 37(19): 245-253

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