Stability of high strength G550 steel compression members

Experiment on bearing capacity of 24 Q460 high strength angle steel for compression members attached by one leg shows: the ultimate bearing capacity of the experiment value are higher than the calculated of the “Design of Latticed Steel Transmission Structures” (ASCE10-1997), on the same section in different slenderness ratio of components, the larger slenderness ratio, the higher the ratio; while on the same slenderness ratio in different sections, the greater width-thickness radio, the greater the ratio. Based on this problem, analyzing the current standard, a set of formulas based on high-strength angle struts connected by single Limb was brought, which can used for the design of the Q460 high-strength angle.

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Proposed Design of High-Strength Spiral Reinforcement in Compression Members

ACI Structural Journal ◽

10.14359/10747 ◽

2001 ◽

Vol 98 (6) ◽

Keyword(s):

High Strength ◽

Compression Members

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Experimental Study for Single-Angle Beam-Column Members Attached by one Leg

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.433 ◽

2010 ◽

Vol 163-167 ◽

pp. 433-438

Author(s):

Xian Lei Cao ◽

Ji Ping Hao ◽

Chun Lei Fan

Keyword(s):

Experimental Study ◽

Finite Element ◽

Carrying Capacity ◽

Model Experiment ◽

Ultimate Load ◽

High Strength ◽

Load Carrying Capacity ◽

Compression Members ◽

Load Carrying ◽

Ultimate Load Carrying Capacity

To obtain a better understanding of the behavior and load-carrying capacity of Q460 high-strength single-angle compression members bolted by one leg, using static loading way to 48 angles carried out experimental study. The experiments show test specimens produce biaxial bending, most small slenderness ratio members are controlled by local buckling, and slender specimens are controlled by overall buckling. In addition to these factors in model experiment, influences of residual stresses on ultimate load-carrying capacity were analyzed by finite element numerical simulation analysis, the results show the residual stresses affect the ultimate load-carrying capacity of angles by about 5％ or less. Comparison of the load-carrying capacity of experimental and theoretical results indicate the difference of experimental and finite element values ranges from -9.99％ to +9.76％, American Design of Latticed Steel Transmission Structure (ASCE10-1997) and Chinese Code for Design of Steel Structures (GB50017-2003) underestimate separately the experimental load-carrying capacity by about 2.34％～33.93％ and 1.18％～63.3％, and the agreement is somewhat good between experimental program and the finite element analysis. Based on model experiment and simulated experiment, the formula of stability coefficient of single-angle compression members was established. It provides basic data for spreading Q460 high-strength single-angles members attached by one leg.

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Research on Stability Bearing Capacity for Pole and Tower Compression Members with Two Legs Connection

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.214.315 ◽

2012 ◽

Vol 214 ◽

pp. 315-319

Author(s):

Xian Lei Cao

Keyword(s):

Numerical Simulation ◽

Analytical Solution ◽

Bearing Capacity ◽

Analytical Method ◽

High Strength ◽

Simulation Method ◽

Elastic Theory ◽

Numerical Simulation Method ◽

Stability Bearing Capacity ◽

Compression Members

In order to research the stability bearing capacity of high strength pole and tower compression members, analytical method and numerical simulation method were used to study stability on high strength axial compression members. Researched the impact of different slenderness ratio, different cross-section factors on the bearing capacity; energy relationship was using in analytical method, the boundary conditions issue is simplified according to different end restraint capacity; the failure modes and stability bearing capacity of members were studied by numerical simulation. Compared with the experimental results show that the numerical simulation and elastic theory analytical solution overestimate the capacity of members, but the numerical results have better agreement than the elastic theory analytical solution, which can show the numerical simulation method is right. Experiment method can obtain more secure mechanical behavior of high-strength angle steel member with axial loading.

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