Experimental study on concrete edge failure of single headed stud anchors after fire exposure

2018 ◽  
Vol 96 ◽  
pp. 176-188 ◽  
Author(s):  
Kaipei Tian ◽  
Joško Ožbolt ◽  
Akanshu Sharma ◽  
Jan Hofmann
Keyword(s):  
Experimental Study ◽  
Fire Exposure ◽  
Edge Failure ◽  
Headed Stud

Experimental determination of the residual compressive strength of concrete columns subjected to different fire durations and load ratios

2020 ◽  
Vol 11 (4) ◽  
pp. 529-543
Author(s):  
Anjaly Nair ◽  
Osama (Sam) Salem
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Reinforced Concrete ◽  
Concrete Columns ◽  
Fire Exposure ◽  
Fire Performance ◽  
Content Type ◽  
Residual Compressive Strength ◽  
Standard Fire ◽  
Strength Capacity

Purpose At elevated temperatures, concrete undergoes changes in its mechanical and thermal properties, which mainly cause degradation of strength and eventually may lead to the failure of the structure. Retrofitting is a desirable option to rehabilitate fire damaged concrete structures. However, to ensure safe reuse of fire-exposed buildings and to adopt proper retrofitting methods, it is essential to evaluate the residual load-bearing capacity of such fire-damaged reinforced concrete structures. The focus of the experimental study presented in this paper aims to investigate the fire performance of concrete columns exposed to a standard fire, and then evaluate its residual compressive strengths after fire exposure of different durations. Design/methodology/approach To effectively study the fire performance of such columns, eight identical 200 × 200 × 1,500-mm high reinforced concrete columns test specimens were subjected to two different fire exposure (1- and 2-h) while being loaded with two different load ratios (20% and 40% of the column ultimate design axial compressive load). In a subsequent stage and after complete cooling down, residual compressive strength capacity tests were performed on each fire exposed column. Findings Experimental results revealed that the columns never regain its original capacity after being subjected to a standard fire and that the residual compressive strength capacity dropped to almost 50% and 30% of its ambient temperature capacity for the columns exposed to 1- and 2-h fire durations, respectively. It was also noticed that, for the tested columns, the applied load ratio has much less effect on the column’s residual compressive strength compared to that of the fire duration. Originality/value According to the unique outcomes of this experimental study and, as the fire-damaged concrete columns possessed considerable residual compressive strength, in particular those exposed to shorter fire duration, it is anticipated that with proper retrofitting techniques such as fiber-reinforced polymers (FRP) wrapping, the fire-damaged columns can be rehabilitated to regain at least portion of its lost load-bearing capacities. Accordingly, the residual compressive resistance data obtained from this study can be effectively used but not directly to adopt optimal retrofitting strategies for such fire-damaged concrete columns, as well as to be used in validating numerical models that can be usefully used to account for the thermally-induced degradation of the mechanical properties of concrete material and ultimately predict the residual compressive strengths and deformations of concrete columns subjected to different load intensity ratios for various fire durations.

Experimental Study of the Headed Stud Connectors in Composite Structure

2020 ◽  
pp. 173-181
Author(s):  
P. Sangeetha ◽  
S. Ramanagopal ◽  
U. Amrutha ◽  
A. Balasubramaniam ◽  
V. Madhumitha ◽  
...  
Keyword(s):  
Experimental Study ◽  
Composite Structure ◽  
Headed Stud

scholarly journals Pile Group Protection with Riprap Mattress

2012 ◽  
Vol 2012 ◽  
pp. 1-7
Author(s):  
Christian Chreties ◽  
Luis Teixeira ◽  
Gonzalo Simarro
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Pile Group ◽  
Flow Conditions ◽  
Pile Groups ◽  
Alternative Methodology ◽  
Edge Failure ◽  
Group Configuration

New experimental data on plan dimensions for riprap mattresses used in pile group protection against edge failure are analyzed. The influence of flow conditions and the distance between piles in plan dimensions of riprap mattresses are addressed. An alternative methodology for the experimental study of edge failure in pile groups is proposed and verified, significantly reducing the duration of tests (from several days to a few hours) and yielding similar results. For the pile group configuration tested, a design expression for minimum riprap width is obtained. The influence of the distance between the piles on the width of riprap dimensions is shown to be small, and the proposed expression compares well with some of the expressions for single piers found in the literature.

scholarly journals EXPERIMENTAL STUDY ON SHEAR STRENGTH OF HEADED STUD SHEAR CONNECTORS AT HIGH TEMPERATURE

2008 ◽  
Vol 73 (630) ◽  
pp. 1417-1423 ◽  
Author(s):  
Satoshi YASUDA ◽  
Shintaro MICHIKOSHI ◽  
Yutaka KOBAYASHI ◽  
Hiroyuki NARIHARA
Keyword(s):  
Experimental Study ◽  
Shear Strength ◽  
High Temperature ◽  
Shear Connectors ◽  
Headed Stud

Experimental study of unloaded structural steel stay-cables under fire exposure

2020 ◽  
Author(s):  
Benjamin Nicoletta ◽  
Scott Watson ◽  
Bronwyn Chorlton ◽  
John Gales ◽  
Panagiotis Kotsovinos
Keyword(s):  
Experimental Study ◽  
Structural Steel ◽  
Fire Exposure ◽  
Stay Cables

Behavior and Strength of Headed Stud–SFRCC Shear Connection. I: Experimental Study

2016 ◽  
Vol 142 (2) ◽  
pp. 04015112 ◽  
Author(s):  
Yunbiao Luo ◽  
Kazuaki Hoki ◽  
Kazuhiro Hayashi ◽  
Masayoshi Nakashima
Keyword(s):  
Experimental Study ◽  
Shear Connection ◽  
Headed Stud

Experimental Study of Thermal Response of LPG Tanks Subjected to External Fire

2008 ◽  
Author(s):  
Zhi Xiang Xing ◽  
Xiao Fang Zhao
Keyword(s):  
Experimental Study ◽  
Experimental Research ◽  
Thermal Response ◽  
Polynomial Equation ◽  
Fire Exposure ◽  
Experimental Apparatus ◽  
Series Of Experiments ◽  
Fill Level ◽  
In Fire ◽  
Fire Type

The experimental research on thermal response of LPG tank exposed to fire is carried out. A experimental apparatus to simulate real accident of LPG tank is designed and manufactured. A series of experiments for different fill levels, different type of tanks subjected to different type of fires are performed with this apparatus. From the results of the experiments, the obvious stratification of temperature in the ladings of the tank is observed. And the pressure is increased due to the stratification. Thermal response of the LPG is affected by various factors such as fire type, tank type and fill level etc. The liquid could be superheated or sub-cooled in fire exposure situation. The pressure can be fitted to time by cube polynomial equation.

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