The Tensile Strength Effect of Stud Connections on Ultimate Loading Capacity of Damaged Composite Bridge

2021 ◽  
Vol 33 (6) ◽  
pp. 363-371
Author(s):  
Janghwan Kim
Keyword(s):  
Tensile Strength ◽  
Loading Capacity ◽  
Composite Bridge ◽  
Ultimate Loading Capacity ◽  
Strength Effect ◽  
Ultimate Loading

scholarly journals Impact and Post-Impact Performance of Sandwich Wall Boards with GFRP Face Sheets and a Web-Foam Core: The Effects of Impact Location

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1714 ◽  
Author(s):  
Yiwei Xia ◽  
Xiaoping Li ◽  
Yu Peng ◽  
Mianheng Lai ◽  
Lu Wang
Keyword(s):  
Mechanical Performance ◽  
Loading Capacity ◽  
Foam Core ◽  
Impact Performance ◽  
Impact Location ◽  
Post Impact ◽  
Sandwich Wall ◽  
Ultimate Loading Capacity ◽  
The Impact ◽  
Ultimate Loading

In recent years, load-bearing exterior sandwich wall boards have been adopted in civil engineering. The exterior walls of structures are often exposed to low velocity impacts such as stones, tools, and windborne debris, etc. The ultimate loading capacity, deformation, and ductility of sandwich walls are weakened by impact loads. In this study, the sandwich wall boards consisted of glass fiber reinforced plastic (GFRP) face sheets and a web-foam core. The core of wall boards was not the isotropic material. There was no doubt that the mechanical performance was seriously influenced by the impact locations. Therefore, it is necessary to carry out an investigation on the impact and post-impact performance of exterior wall boards. A comprehensive testing program was conducted to evaluate the effects of impact locations and impact energies on the maximum contact load, deflection, and contact time. Meanwhile, the compression after impact (CAI) performance of wall boards were also studied. The results indicated that the impact location significantly affects the performance of wall boards. Compared with an un-damaged wall board, the residual ultimate loading capacity of damaged wall boards reduced seriously, which were not larger than 50% of the designed ultimate loading capacity.

Analysis of Ultimate Loading Capacity of Inner Concave Cable-Arch Structure with Different Arch Rise-Span Ratio

2012 ◽  
Vol 204-208 ◽  
pp. 954-957 ◽  
Author(s):  
You Bao Jiang ◽  
Guo Yu Liao
Keyword(s):  
Failure Mode ◽  
Rational Design ◽  
Failure Modes ◽  
Loading Capacity ◽  
The Finite Element Method ◽  
Failure Loads ◽  
Linear Effects ◽  
Arch Structure ◽  
Ultimate Loading Capacity ◽  
Ultimate Loading

Parametric analysis of ultimate loading capacity is performed by the finite element method considering the dual non-linear effects for inner concave cable-arch structure with different arch rise-span ratio. The results show that for the inner concave cable-arch structure with other given conditions, the failure loads of the steel arch and the cable increase with the increase arch rise-span ratio, but the increasing ratios are different. The failure modes of inner concave cable-arch structure may be divided into three types: the steel arch failure, the overall failure and the cable failure. According to the considered parameters range in this paper, the steel arch failure mode may occur when the arch rise-span ratio is less than 0.3; the overall failure mode may occur when the arch rise-span ratio is between 0.3 to 0.35; and the cable failure mode may occur when the arch rise-span ratio is greater than 0.35. This provides some useful references for rational design of such structures.

Non-Linear Analysis for Ultimate Loading Capacity of Cast Tubular T-Joints

2005 ◽  
Author(s):  
Peng Sun ◽  
Yuanqing Wang ◽  
Yongjiu Shi
Keyword(s):  
Finite Element ◽  
Linear Analysis ◽  
Additional Parameter ◽  
Loading Capacity ◽  
T Joints ◽  
Geometry Model ◽  
Tubular Joints ◽  
Non Linear ◽  
Ultimate Loading Capacity ◽  
Ultimate Loading

In this paper, we performed a lot of parametric analysis of cast T-joints. The geometry model was established using Solidworks. Non-linear analysis was carried out using the commercial finite element programme Ansys. Parametric equations of ultimate loading capacity derived from the results of finite element analysis are presented for the usual range of basic shapes of T-joints under axial loading, in-plane and out-of-plane bending. The sensitivity of the ultimate loading capacity in cast tubular joints to variation in the geometric parameters has been assessed. Besides the parameters which governing the stresses in welded joints, an additional parameter ρ that is defined by C. D. Edwards has been introduced to describe the size of fillet. In this paper, the sensitivity of ultimate loading capacity of cast tubular joints to the parameter ρ is presented.

Structural Response of Timber-Concrete Composite Beams Predicted by Finite Element Models and Manual Calculations

2014 ◽  
Vol 17 (11) ◽  
pp. 1601-1621 ◽  
Author(s):  
Nima Khorsandnia ◽  
Hamid Valipour ◽  
Keith Crews
Keyword(s):  
Finite Element ◽  
Axial Stress ◽  
Damage Model ◽  
Structural Response ◽  
General Purpose ◽  
Finite Element Models ◽  
Fe Model ◽  
Loading Capacity ◽  
Model Predictions ◽  
Ultimate Loading Capacity

This paper presents the structural response of timber-concrete composite (TCC) beams predicted by finite element models (i.e. continuum-based and 1D frame) and manual calculations. Details of constitutive laws adopted for modelling timber and concrete are provided and application of the Hashin damage model in conjunction with continuum-based FE for capturing failure of timber under bi-axial stress state is discussed. A simplified strategy for modelling the TCC connection is proposed in which the connection is modelled by a nonlinear spring and the full load-slip behaviour of each TCC connection is expressed with a formula that can be directly implemented in the general purpose FE codes and used for nonlinear analysis of TCC beams. The developed FE models are verified by examples taken from the literature. Furthermore, the load-displacement response and ultimate loading capacity of the TCC beams are determined according to Eurocode 5 method and compared with FE model predictions.

EFFECT OF CURE EFFICIENCY ON PROPERTIES OF GUM AND BLACK FILLED NATURAL RUBBER VULCANIZATES

2011 ◽  
Vol 84 (2) ◽  
pp. 229-242 ◽  
Author(s):  
Gary R. Hamed ◽  
Kanoktip Boonkerd
Keyword(s):  
Electron Microscopy ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Crosslink Density ◽  
Cure Time ◽  
Cracking Pattern ◽  
Natural Rubber Vulcanizates ◽  
Scanning Electron ◽  
Fracture Specimens ◽  
Strength Effect

Abstract Effects of the sulfur cure efficiency on the reversion behavior and the normal and edge-cut tensile strength of gum and black filled natural rubber (NR) vulcanizates were studied. N, N-dicyclohexyl-2-benzothiazole sulfenamide (DCBS) was used as an accelerator. A series of five vulcanizates with high to low cure efficiencies was prepared by increasing the sulfur (S) to DCBS ratios within the range of 0.26–6.66. All vulcanizates were formulated to have the same crosslink density. The degree of reversion (%) calculated from cure curves of gum and black filled NR at 20 min above the cure time (tc100) passed through maximum with decreasing cure efficiencies. For both gum and black filled NR, the highest degree of reversion (%) was observed at the S/DCBS ratio of 1.17. The normal tensile strengths of gum and black filled NR were directly proportional to the cure efficiency. For gum NR vulcanizates, the edge-cut tensile strength was markedly influenced by cure efficiency. Similar to the normal tensile strength, the gum NR vulcanizates cured with the lowest cure efficiency showed the lowest edge-cut tensile strength. Effect of the cure efficiency on the edge-cut tensile strength was less in the case of black filled NR vulcanizates. However, the black filled NR vulcanizates cured with the lowest cure efficiency also showed the lowest edge-cut tensile strength. The cut tip characteristics of the fracture specimens were investigated using scanning electron microscopy. The gum specimens showed only the simple lateral cracking pattern, while all black filled specimens showed the longitudinal cracking pattern. Four different cracking patterns of the black filled specimens were identified. The distribution of cracking patterns depended strongly on the size of precut and the cure efficiency.

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