Degradation and damage behaviors of steel frame welded connections

Wang, Meng; Yong-jiu, Shi; Wang, Yuanqing; Xiong, Jiechao; Hong, Chen

doi:10.12989/scs.2013.15.4.357

Cited by 10 publications

(11 citation statements)

References 12 publications

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“…The buckling behavior of bidirectional natural fiber (sisal fiber) reinforced composite plates has been observed that the first buckling load decreases rapidly with time, and then approaches a certain value with time, Figure 16 [115]. The buckling load for 400 hours is almost the same as that for 800 hours because the hydrothermal aging has reached completion due to a long time.…”

Section: Failure Mechanisms In Compositementioning

confidence: 95%

“…The buckling load for 400 hours is almost the same as that for 800 hours because the hydrothermal aging has reached completion due to a long time. Furthermore, it has also been noticed that the reduction of buckling load with high fiber content is larger than the low fiber content because the degradation of elastic modulus for the composite plate with high fiber content is larger, Figure 17 [115]. The buckling behavior of natural sisal fiber‐reinforced composite plate has been studied and observed that increasing the volume fraction of sisal reinforcement fiber improves the stiffness or modulus of elasticity (mechanical properties of composite materials) of composites and hence, causes an increase in the buckling load of composite plate [116].…”

Section: Failure Mechanisms In Compositementioning

confidence: 99%

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Damage mechanisms and constitutive models for natural fiber‐based green composites: A review

Kumar

Tevatia

Dixit³

2022

Materialwissenschaft Werkst

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Natural fibers are capable substitutes to conventional synthetic fibers, primarily because of their economic and environmental advantages, as well as they find widespread applications in textile, construction, and non-load-bearing applications in the case of automotive and aircraft industries. This paper presents a comprehensive review of natural fiber-reinforced composites, focusing on their failure behavior, failure modelling techniques, and associated theories. Finite element modelling is widely applied in the damage modelling of natural fiber as well as natural fiber-based green composites. Formation of representative volume elements in conjunction with homogenization emerges to be the common and most effective multi-scale technique used for determining the effect of microstructures on the thermal and mechanical properties of the natural fiber-reinforced composite. To provide a better understanding of the insight of damage aspects of natural fiber composites an up-to-date review catering to various aspects ranging from its manufacturing techniques, failure processes and mechanisms, finite element modelling techniques, and mechanical performance is very much required. This review aims to address the above-stated issues, challenges, and details of achievements made with them.

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Section: Failure Mechanisms In Compositementioning

confidence: 95%

Section: Failure Mechanisms In Compositementioning

confidence: 99%

Damage mechanisms and constitutive models for natural fiber‐based green composites: A review

Kumar

Tevatia

Dixit³

2022

Materialwissenschaft Werkst

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“…Due to the effect of horizontal loads, the frame joints are generally in the state of multi-axis complex stress, including the axial force, shear force, bending moment and even torque, so that they can be a weak link for seismic design of frame structure. Wang et al (2013) evaluated the degradation and damage behaviors of ten steel frame welded connections under various cyclic loading patterns, and pointed out that the model with only displacement variable was easier to be formulated and embedded in application programs.…”

Section: Methodsmentioning

confidence: 99%

Earthquake Damage Evaluation of T-Shaped SRC Composite Column-Steel Beams in 3D Connection Joints

Chen

et al. 2015

Advances in Structural Engineering

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This paper focuses on the study of seismic-induced damage assessment of three-dimensional (3D) joints connected with T-shaped steel reinforced concrete (SRC) column-steel beams. Low cyclic reversed loading tests on one planar joint and nine 3D joints were firstly conducted to intensively investigate the seismic behavior of the hybrid joint. The damage index calculation models such as the displacement-based type, energy-based type and displacement & energy-based type were discussed and applied for all the specimens according to the experimental results. In addition, the effects of shape steel configuration type, loading angle and axial compression ratio on the damage development and accumulation for test specimens were analyzed through Park-Ang model. The analysis results show that the selected parameters of damage-index calculation models have great effect on the developing trends of damage curves. Under the same ability of relative deformation, the accumulated damage of the specimens configured with T-shaped steel are much larger than that of the specimens configured with channel-shaped and solid-web steels; moreover, the degree of damage accumulation for the specimens under 30° and 60° loading angles is slightly larger than that of the specimens under 45° loading angle. The specimens subjected to a lower axial force level have a faster damage development, but the damage accumulation is smaller than that of the specimens under a higher axial compression ratio.

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“…Among the various requirements for the application performance, reducing the vibration and noise of the system has attracted wide attention. Many research studies have been carried out to develop damping materials to realize the minimum vibration and noise [3][4][5], among which, embedding viscoelastic materials with high loss factor in the composites is one of the most effective strategies to reduce the vibration and noise [6][7][8]. However, the introduction of the viscoelastic materials generally leads to many other problems such as ageing degradation of damping materials, delamination in composites [9] and the decreased mechanical properties [10].…”

Section: Introductionmentioning

confidence: 99%

The preparation and properties of novel structural damping composites reinforced by nitrile rubber coated 3‐D braided carbon fibers

et al. 2018

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Based on the important applications of structural damping composites in aerospace and automobile areas, novel structural-damping composites reinforced by nitrile rubber coated 3-D braided carbon fibers (RCF 3D / epoxy) were successfully prepared through the vacuum assisted resin transfer molding process in this work. The damping property of the composites was experimentally investigated using cantilever beam vibration test and dynamic mechanical analysis. The results exhibit that the damping loss factor of the composites obtained from cantilever beam vibration test increases by 120%, reaching 0.068 after nitrile rubber coating modification. At the frequency of 1 Hz at room temperature, the loss factor of RCF 3D /epoxy is about five times as high as that of the original composites. Furthermore, the impact strength and transverse shear strength increase by 11 and 6.8%, respectively, although the flexural strength and modulus and the longitudinal shear strength decrease slightly. The product of elastic modulus and loss factor E*η as the maximum merit index reaches 2.17 GPa. The results mentioned above indicate that rubber coating modification proposed in this work is an effective way to optimize the damping property with a negligible influence on mechanical properties of the RCF 3D /epoxy, which will be a promising strategy for obtaining structural-damping composites. POLYM. COM-POS., 40:E599-E608, 2019. A novel structural-damping composites reinforced by nitrilerubber coated 3-D braided carbon fibers (RCF 3D /epoxy) were successfully prepared through RTM process. 2. Nitrile rubber coating on the fibers to absorb the vibrational energy is an effective method to improve the damping performance of the 3D braided composites. 3. The RCF 3D /EP composites showed the excellent compatibility of stiffness and damping of materials simultaneously.

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Degradation and damage behaviors of steel frame welded connections

Cited by 10 publications

References 12 publications

Damage mechanisms and constitutive models for natural fiber‐based green composites: A review

Damage mechanisms and constitutive models for natural fiber‐based green composites: A review

Earthquake Damage Evaluation of T-Shaped SRC Composite Column-Steel Beams in 3D Connection Joints

The preparation and properties of novel structural damping composites reinforced by nitrile rubber coated 3‐D braided carbon fibers

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