Experimental investigation of CHS T/Y‐joints fabricated from high‐strength steel

Stahlbau ◽  
2021 ◽  
Vol 90 (8) ◽  
pp. 599-599
Keyword(s):  
Experimental Investigation ◽  
High Strength Steel ◽  
High Strength

Experimental investigation on cyclic behavior of Q690D high strength steel H-section beam-columns about strong axis

2019 ◽  
Vol 189 ◽  
pp. 157-173 ◽  
Author(s):  
Le-Tian Hai ◽  
Guo-Qiang Li ◽  
Yan-Bo Wang ◽  
Fei-Fei Sun ◽  
Hua-Jian Jin
Keyword(s):  
Experimental Investigation ◽  
High Strength Steel ◽  
High Strength ◽  
Cyclic Behavior ◽  
Beam Columns

Experimental Investigation on Steel H-Beam Prestressed with Externally High Strength Steel Bars

2014 ◽  
Vol 578-579 ◽  
pp. 155-159 ◽  
Author(s):  
Peng Cheng Zhu ◽  
Ming Kang Gou ◽  
Yin Zhi Zhou
Keyword(s):  
Experimental Investigation ◽  
Bearing Capacity ◽  
High Strength Steel ◽  
High Strength ◽  
Ultimate Bearing Capacity ◽  
Prestressing Force ◽  
Steel Bars ◽  
Post Tensioning ◽  
H Beam ◽  
Externally Prestressing

The external post-tensioning technique has been commonly used in the construction field because it facilitates the analysis of structures and is widely applicable for many types of structures. In this research, 12 steel H-beams were built and tested in terms of the amount of tendon or prestressing force. The results show that the externally prestressing method can increase ultimate bearing capacity of the beams. The prestressing force is the significant factor that influence the strengthening of steel H-beams. However, the amount of deviators cannot significantly influence the bearing capacity.

scholarly journals Experimental Investigation on Failure Behaviors of G50 Ultra-High Strength Steel Targets Struck by Tungsten Alloy Spherical Fragments at High Velocity

2021 ◽  
Vol 7 ◽  
Author(s):  
Hu Peng ◽  
Wang Shouqian ◽  
Feng Xiaowei ◽  
Li Juncheng ◽  
Lu Zhengcao ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
High Velocity ◽  
High Strength Steel ◽  
High Strength ◽  
Tungsten Alloy ◽  
Rarefaction Waves ◽  
Depth Of Penetration ◽  
Penetration Process ◽  
Ultra High Strength Steel ◽  
Good Agreement

An experimental investigation is presented into the failure behaviors of the G50 ultra-high strength steel targets struck by tungsten alloy spherical fragments at high velocity. The depth of penetration and the crater volume of G50 steel targets at velocities ranging from 923 to 1,807 m/s are obtained by ballistic gun experiments. A conic-like crater is observed in the G50 steel target after impact by a tungsten alloy spherical fragment, which is different from that in the experiments of low strength steel targets. It is believed that the eroding and fragmentation of the tungsten fragment during the penetration process give rise to this phenomenon. In addition, several tensile cracks are found both at the crater surface and the crater bottom, which are considered to be caused by tensile stress induced by the superposition of rarefaction waves at some local areas of the impacted interface. Numerical simulations of the penetration of tungsten alloy fragments into G50 steel targets are performed to predict failure features of the targets. It is shown that the numerical results are in good agreement with available experimental results.

scholarly journals Post-fire mechanical properties of high strength steels

2018 ◽  
Author(s):  
Ben Young ◽  
Hai-Ting Li
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Ambient Temperature ◽  
High Strength Steel ◽  
Elevated Temperatures ◽  
Weight Ratio ◽  
High Strength Steels ◽  
High Strength ◽  
Predictive Equations ◽  
Retention Factors

High strength steels are becoming increasingly attractive for structural and architectural applications due to their superior strength-to-weight ratio which could lead to lighter and elegant structures. The stiffness and strength of high strength steels may reduce after exposure to fire. The post-fire mechanical properties of high strength steels have a crucial role in evaluating the residual strengths of these materials. This paper presents an experimental investigation on post-fire mechanical properties of cold-formed high strength steels. A series of tensile coupon tests has been carried out. The coupon specimens were extracted from cold-formed square hollow sections with nominal yield stresses of 700 and 900 MPa at ambient temperature. The specimens were exposed to various elevated temperatures ranged from 200 to 1000 °C and then cooled down to ambient temperature before tested to failure. Stress-strain curves were obtained and the mechanical properties, namely, Young’s modulus, yield stress (0.2% proof stress) and ultimate strength, of the cold-formed high strength steel materials after exposure to elevated temperatures were derived. The post-fire retention factors that obtained from the experimental investigation were compared with existing predictive equations in the literature. New predictive equations are proposed to determine the residual mechanical properties of high strength steels after exposure to fire. It is shown that the proposed predictive equations are suitable for both cold-formed and hot-rolled high strength steel materials with nominal yield stresses ranged from 690 to 960 MPa.

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