Damage assessment for seismic response of recycled concrete filled steel tube columns

2016 ◽  
Vol 15 (3) ◽  
pp. 607-616 ◽  
Author(s):  
Yijie Huang ◽  
Jianzhuang Xiao ◽  
Luming Shen
Keyword(s):  
Seismic Response ◽  
Damage Assessment ◽  
Steel Tube ◽  
Recycled Concrete ◽  
Concrete Filled Steel Tube

Shear response of steel fiber reinforced recycled concrete-filled steel tube columns

2021 ◽  
pp. 136943322110093
Author(s):  
Zhenzhen Liu ◽  
Yiyan Lu ◽  
Shan Li ◽  
Jiancong Liao
Keyword(s):  
Axial Compression ◽  
Steel Fiber ◽  
Steel Tube ◽  
Shear Capacity ◽  
Recycled Concrete ◽  
Recycled Aggregate ◽  
Superposition Method ◽  
Fiber Reinforced ◽  
Concrete Filled Steel Tube ◽  
Shear Span

A comprehensive study of the shear characteristics of steel fiber reinforced recycled concrete-filled steel tube (SRCFST) columns is conducted. 50 CFST stub columns are tested with the variables of steel tube diameter-thickness ratio ( D/t), shear span-to-depth ratio (λ), axial compression ratio ( n), and concrete mix. Two types of cements, three recycled aggregate percentages, three water-cement ratios, and three steel fiber contents are considered in design of concrete mixes. The experimental results show that SRCFST columns present the coincident shear behavior of the ordinary CFST columns. As λ is increased, shear resistance shows a downtrend, while the flexural strength presents an increasing trend. Imposing axial compression or thickening steel tube contributes to an adequate safety margin in plastic period. Based on the contributions superposition method, a predicted model of the shear capacity of SRCFST columns is proposed in consideration of shear-span ratio, axial compression, and self-stress.

Significance of Fire Resistance Performance on the Recycled Concrete-Filled Steel Tube

2012 ◽  
Vol 174-177 ◽  
pp. 881-884 ◽  
Author(s):  
Xiao Liu ◽  
Lei Zhao
Keyword(s):  
Fire Resistance ◽  
Steel Tube ◽  
Recycled Concrete ◽  
Structural Components ◽  
Original Performance ◽  
Concrete Filled Steel Tube ◽  
Existing Building ◽  
Waste Concrete ◽  
Fire Properties ◽  
Resistance Performance

Recycled concrete was waste concrete re-processing to restore the original performance, so that the waste of resources to re-use. It’s important to study the recycled concrete fire resistance, by analyzing the frequency of the existing building fire, the extent of waste concrete increasing year by year. Through the analysis of recycled concrete as structural components in the deficiencies of strength, seismic and fire resistance, indicates the importance of anti - fire properties of recycled concrete - filled steel tube.

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