Experimental studies on recycled aggregate concrete filled stainless steel tube stub columns

2012 ◽  
pp. 383-389 ◽  
Author(s):  
Y Yang ◽  
G Ma ◽  
J Wang
Keyword(s):  
Stainless Steel ◽  
Experimental Studies ◽  
Steel Tube ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Stainless Steel Tube ◽  
Aggregate Concrete ◽  
Stub Columns

scholarly journals Numerical Study on Confinement Effect and Efficiency of Concentrically Loaded RACFRST Stub Columns

2021 ◽  
Vol 8 ◽  
Author(s):  
Yicen Liu ◽  
Fei Lyu ◽  
Faxing Ding ◽  
En Wang ◽  
Yunlong Xu ◽  
...  
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Steel Tube ◽  
Recycled Aggregate Concrete ◽  
Confinement Effect ◽  
Recycled Aggregate ◽  
Recycled Aggregates ◽  
Superposition Method ◽  
Aggregate Concrete ◽  
Stub Columns

The mechanical behaviors of recycled aggregate concrete (RAC) are upgraded by outer steel tube confinement, and the performance of recycled aggregate concrete-filled steel tubular (RACFST) columns is similar to that of the traditional concrete-filled steel tube (CFST) columns. The purpose of this study is to investigate the behaviors of recycled aggregate concrete-filled rectangular steel tubular (RACFRST) stub columns under axial loading. Three-dimensional finite element (FE) models were established, which utilized a triaxial plastic-damage constitutive RAC model considering the replacement ratio of recycled aggregates. The finite element analysis results indicated that the lessened ultimate bearing capacity of RACFRST stub columns compared with their traditional concrete infilled counterparts was mainly due to the weakened confinement effect and confinement efficiency. A simplified formula of the bearing capacity of concentrically loaded RACFRST stub columns was proposed. The cross-sectional stress nephogram was reasonably simplified by the limited state of infilled concrete. The basics of proposed formula were the equilibrium condition and the superposition method. Finally, the formula for the bearing capacity of RACFRST stub columns was evaluated by comparing its accuracy and feasibility to some design formulae proposed by specialists and some design codes of different regions.

Design and development of pressure sensor based on Fiber Bragg Grating (FBG) for ocean applications

2020 ◽  
Vol 90 (3) ◽  
pp. 30501 ◽  
Author(s):  
Venkata Satya Chidambara Swamy Vaddadi ◽  
Saidi Reddy Parne ◽  
Sanjeev Afzulpurkar ◽  
Shivanand Prabhu Desai ◽  
Vijeesh Vadakke Parambil
Keyword(s):  
Stainless Steel ◽  
Fiber Bragg Grating ◽  
Pressure Sensor ◽  
Experimental Studies ◽  
Steel Tube ◽  
Bragg Grating ◽  
Stainless Steel Tube ◽  
Air Cavity ◽  
Compact Design ◽  
Column Pressure

A Fiber Bragg Grating (FBG) based sensors has been designed, fabricated and is being prototyped to measure the ocean water column pressure. To measure the pressure variation, a compact design is made by using stainless steel disks and rubber “O” rings in a closed air cavity setup. The pressure in static freshwater column ranging from 0 to 0.04 MPa was gauged, using closed air cavity setup. Also, another “T” shaped design, for testing, has been made of solid stainless-steel tube with the open-air cavity for an extended range of pressure sensing. By using an oil pressure pump and open-air cavity setup, pressure values from 0 to 0.5 MPa have been measured. In both setups same thickness of copper, stainless steel diaphragms are used to measure the pressure. Range of measurements has been carried out to test both the setups. Results indicate that the pressure sensitivity in closed air cavity setup is 24.95 nm/MPa with linearity 99.72%. In the open-air cavity, setup is 16.22 nm/MPa with linearity 99.34% is achieved. Simulation and experimental studies are performed to validate the efficacy of the designed FBG pressure sensor.

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