Numerical Analysis on Failure Modes of Steel Frame under Fire Combined Blast Loads

2013 ◽  
Vol 831 ◽  
pp. 476-480
Author(s):  
Shi Yan ◽  
Lu Yang ◽  
Xue Lei Jiang
Keyword(s):  
Finite Element Method ◽  
Temperature Field ◽  
Room Temperature ◽  
Failure Modes ◽  
Steel Frame ◽  
Frame Structure ◽  
Blast Load ◽  
Second Step ◽  
Temperature Analysis ◽  
In Fire

An H-shaped steel frame in fire combined blast loading was numerically developed in this paper using finite element method by ANSYS thermal analysis. At the first step, a temperature field has been numerically analyzed. At the second step, each element of the steel frame was assigned different modulus of elasticity and yield stress based on the temperature analysis results. A dynamic simulation of the steel frame subjected to a blast load was analyzed under such a temperature field. The failure modes of the frame structure has been discussed. Finally, a same shape frame at the room temperature under the same blast load was simulated to compare with that at the elevated temperature.

scholarly journals Experimental Study on the Seismic Performance of a Partition Damped Wall-Filled Frame Structure

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Shuainan Zhai ◽  
Zuyin Zou ◽  
Zhanyuan Zhu ◽  
Zixing Zhang ◽  
Wei Liang ◽  
...  
Keyword(s):  
Failure Modes ◽  
Lateral Displacement ◽  
Steel Frame ◽  
Frame Structure ◽  
Comparison Analysis ◽  
Significant Damage ◽  
Loading Tests ◽  
Energy Dissipation Capacity ◽  
Mechanical Performances ◽  
Cyclic Loading Tests

In the past, earthquakes have caused significant damage to traditional masonry filler wall frame structures. To solve this problem, a new design scheme, the partition damping filler wall, is proposed in this paper to reduce the interaction between the filler wall and the frame structure. Low cyclic loading tests are carried out on the traditional and the new masonry filler wall frames. Besides, one full-scale-angled span layer frame without a filler wall is produced for comparison analysis. The mechanical performances of the different frames are studied, including the characteristics of the deformation failure modes, hysteretic curves, skeleton curves, rigidity degeneration, energy dissipation capacity, and the lateral displacement of the frame columns. The research results show that the partition damping filler wall can significantly decrease the diagonal bracing effect of the filler wall on the steel frame. Meanwhile, the setting of the low-strength mortar between the filler wall and steel frame and the arrangement of the damping layer can improve the stress distribution and delay the crack development of the wall. Furthermore, the stiffness degradation rate of the partition damping filler wall is obviously slower than that of the traditional masonry filler wall frame structure. In this paper, the partition damped wall-filled frame structure shows outstanding ductility and deformation capacity.

Temperature Field Analysis of Space Grid Structures

2012 ◽  
Vol 204-208 ◽  
pp. 877-880
Author(s):  
Guang Yong Wang ◽  
Na Wang
Keyword(s):  
Heat Transfer ◽  
Temperature Field ◽  
Element Model ◽  
Field Analysis ◽  
Temperature Analysis ◽  
Grid Structure ◽  
Space Grid ◽  
Steel Members ◽  
Proposed Model ◽  
In Fire

A heat transfer finite element model for the temperature analysis of space grid structures considering the conduction and protection thickness of the steel members in fire is proposed, and the temperature field of a typical grid structure is analyzed by using the proposed model. The results show that the proposed model is reasonable.

scholarly journals PERILAKU PORTAL BAJA DENGAN SAMBUNGAN SEMI RIGID TERHADAP BEBAN LATERAL

2019 ◽  
Author(s):  
AW.Efendi Wahyudi Aco Wahyudi Efendi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Brittle Fracture ◽  
Experimental Validation ◽  
Lateral Load ◽  
Steel Frame ◽  
Frame Structure ◽  
The Finite Element Method ◽  
The Difference ◽  
Steel Frame Structure

Semi-rigid connections are very economical compared to other connections, due to be able to avoid a direct portal framework from brittle fracture without endangering the whole structure. Steel frame structure is one of the type set forth in the guidelines on the construction of simple buildings earthquake resistant.Research with semi-rigid connections portal using the Finite Element Method (FEM) with ANSYS ED.9 by taking a model of experimental validation and analysis manual calculations, and uses 35 models with the difference of loading, the position and number of bolts and stiffener type of portal.The ability to survive in the portal due to lateral load is dominated by the number and position of the bolt and the type of stiffener portal used, it can be seen from the differences in the model with increase in the ratio of each model in the range 0.7852 to 2.5900 and the softening conditions compared flops stiffener which decreased voltage with the same ratio.

scholarly journals Simulation of Mechanical Properties of Special-Shaped Concrete-Filled Steel Tubular Column and Steel Beam Joints after Fire

2022 ◽  
Vol 2148 (1) ◽  
pp. 012028
Author(s):  
Yi Zhao ◽  
Huihui Xu ◽  
Menghui Yan ◽  
Shuai Wang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Bearing Capacity ◽  
Room Temperature ◽  
Failure Modes ◽  
Ultimate Bearing Capacity ◽  
Cooling Curve ◽  
Steel Beam ◽  
Finite Element Software ◽  
Hysteretic Performance

Abstract To study fire after the mechanical performance of steel girder node special-shaped concrete-filled steel tube column, based on standard ISO - 834 litres of cooling curve, the node temperature field model was established based on finite element software ABAQUS, the compute nodes in the overall uniform temperature field under fire as a result, the reasonable choice of fire after the steel and concrete constitutive model, the temperature field results into the node stress model, considering the factors that influence the whole effect of fire loading in low cycle, the nodes of the finite element model, and contrast analysis of the temperature after the fire of the node and hysteretic performance and ultimate bearing capacity. The results show that the failure modes of special-shaped CFST column-steel beam joints at room temperature and after fire are the same, and the ultimate bearing capacity of the joints after fire decreases significantly by 14.88% compared with that at room temperature.

scholarly journals Deformation and strength of steel frame structure in fire environments.

1987 ◽  
pp. 303-310
Author(s):  
Shunsuke BABA ◽  
Noriyuki NAKADA ◽  
Kenichi SEGI
Keyword(s):  
Steel Frame ◽  
Frame Structure ◽  
In Fire ◽  
Steel Frame Structure

The Seismic Experiment of Steel Frame with GRC Lath

2011 ◽  
Vol 255-260 ◽  
pp. 2483-2487
Author(s):  
Lin Feng Lu ◽  
Tao Zhang ◽  
Wen Qi Fang
Keyword(s):  
Energy Dissipation ◽  
Seismic Design ◽  
Failure Modes ◽  
Steel Frame ◽  
Hysteretic Behavior ◽  
Frame Structure ◽  
Moment Frame ◽  
Steel Moment Frame ◽  
Wall Specimen ◽  
Earthquake Zone

Two 1:4 scale wall specimen was tested under cyclic load to determine its seismic behavior, the responses of the steel frame with GRC lath are studied such as the failure modes, hysteretic behavior, ductility, energy dissipation, and the experimental results were compared with the steel frame. The testing data analysis indicated that bearing capacity, lateral stiffness, ductility and energy dissipation of the steel frame with GRC light hollow lath are superior to the steel moment frame, the steel frame with GRC lath is an ideal lateral resistant system. The prolapse of GRC lath from the frame did not appear, so the steel frame with GRC lath could be better used in the earthquake zone. Due to the collapse of connection of lath with frame, the ductility coefficient of the system is generally between 2 and 3, it is less than requirement of the seismic design specifications, and therefore a suggestion is that the seismic design of steel frame with GRC lath can be according to non-filled wall frame structure.

scholarly journals Experimental and Numerical Analysis of Steel Frame Structure Exposed to High Temperature

2014 ◽  
Vol 14 (2) ◽  
pp. 64-68 ◽  
Author(s):  
Lenka Lausová ◽  
Pavlina Matečková ◽  
Iveta Skotnicová
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Temperature ◽  
Material Properties ◽  
Steel Frame ◽  
Frame Structure ◽  
Ansys Software ◽  
Basic Principles ◽  
Fire Loading ◽  
Steel Frame Structure

Abstract Structures exposed to fire loading, where supports prevent thermal expansions, must be calculated according to the basic principles of mechanics while respecting the effect of rising temperature on the structure and its effect on the value of variable material properties at the time of fire. The paper analyzed and compared results of the experiment aimed to verify the behavior of statically indeterminate steel frame exposed to high temperature and numerical modelling using finite element method in the ANSYS software.

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