THE EFFECT OF STATIC AND DYNAMIC LOADS ON A REINFORCED-CONCRETE TIED-ARCH BRIDGE.

1949 ◽  
Vol 32 (5) ◽  
pp. 50-79
Author(s):  
A J OCKLESTON
Keyword(s):  
Reinforced Concrete ◽  
Dynamic Loads ◽  
Arch Bridge ◽  
Static And Dynamic Loads ◽  
Tied Arch Bridge

scholarly journals Analysis on Construction Technology of Reinforced Concrete Tied Arch Bridge

2021 ◽  
Vol 5 (6) ◽  
pp. 67-71
Author(s):  
Zhongyu Wang
Keyword(s):  
Reinforced Concrete ◽  
Cost Savings ◽  
Construction Cost ◽  
Construction Technology ◽  
Bridge Construction ◽  
Construction Quality ◽  
Arch Bridge ◽  
Subsequent Application ◽  
Arch Bridges ◽  
Tied Arch Bridge

Bridge construction has received a lot of attention as transportation continues to improve. Reinforced concrete linked arch bridges are a common bridge style in today’s bridge construction. This type of bridge not only has a basic and generous shape, but it is also incredibly easy to construct, resulting in significant material and construction cost savings. This article analyzes the construction technology of a reinforced concrete linked arch bridge in order to achieve good construction and application. It is hoped that this analysis can provide a scientific reference for the guarantee of the construction quality and subsequent application effect of this kind of bridge.

scholarly journals The design model of reinforced concrete beam formed by the field of cracks directions

2019 ◽  
Vol 97 ◽  
pp. 04017
Author(s):  
Sofia Kurnavina ◽  
Ilya Tsatsulin
Keyword(s):  
Differential Equation ◽  
Reinforced Concrete ◽  
Concrete Beam ◽  
Longitudinal Force ◽  
Reinforced Concrete Beam ◽  
Equation Of Motion ◽  
Dynamic Loads ◽  
Force Ratio ◽  
Internal Forces ◽  
Static And Dynamic Loads

Now the design of reinforced concrete constructions for static and dynamic loads with regard to the elastoplastic resistance diagrams of materials is widely used. The model of a reinforced concrete beam is proposed, which consists of trapezoidal elements formed by the field of cracks directions. The theoretical angle of inclination of a crack at any point of a beam has been determined on the basis of minimum of external load, necessary for its formation, which has been obtained from the equation of energy balance. The deflections of each point of a beam have been obtained by solving a differential equation of motion at each step the account. The strains in any fiber of normal and inclined sections have been determined according to the hypothesis of bilinear sections. The stresses in concrete and reinforcement have been obtained with the help of the variable elastoplastic stress-strain curves «σ-ε». The failure mechanism of a beam has been determined on a basis of the transverse to longitudinal force ratio in compressed area of concrete. The internal forces have been determined with the help of numerical section height integration of stresses and from the equation of balance of elements above the crack.

Analysis on Security Appraisa of the Existing Reinforced Concrete Bridges

2014 ◽  
Vol 501-504 ◽  
pp. 1314-1317
Author(s):  
Shan Shan Xu
Keyword(s):  
Numerical Simulation ◽  
Reinforced Concrete ◽  
Theoretical Analysis ◽  
Research Methods ◽  
Field Test ◽  
Concrete Bridges ◽  
Dynamic Loads ◽  
Reinforced Concrete Bridges ◽  
Static And Dynamic Loads

Safety inspection of the bridge has become particularly important owing to a large number of aging bridges in China, in order to evaluate the safety of a bridge project that has been completed in Harbin, research methods of combining theoretical analysis, numerical simulation and field test is applied, response parameters changes under static and dynamic loads is studied emphatically in this paper.

New Research on the Use of Hardening Plastics for Aircraft Construction

1940 ◽  
Vol 44 (349) ◽  
pp. 44-73
Author(s):  
Wilhelm Kuech
Keyword(s):  
Strength Properties ◽  
Dynamic Loads ◽  
Absorbed Energy ◽  
Good Strength ◽  
Different Temperatures ◽  
Bonding Properties ◽  
Static And Dynamic Loads ◽  
Impact Bending ◽  
New Research ◽  
Laminated Materials

Laminated materials incorporating plastics seem to be especially well suited lor highly stressed aircraft components, by reason of their good strength properties. Paper, fabric and wood veneers treated with plastics on a phenolic basis were tested with regard to their strength, especially in bending, shear, absorbed energy in impact bending, notching strength and in their resistance against moisture. Further, the behaviour of compressed plastics was studied at different temperatures under static and dynamic loads. A part of the research was extended to pure phenol resin and to thermoplastics based on methacrylate and polyvinylchloride. The bonding properties of laminated compressed plastics were established. Concluding, some experiments relating to the practical manufacture of aeroplane components are communicated.

scholarly journals Preliminary investigation of use of flexible folding wing tips for static and dynamic load alleviation

2016 ◽  
Vol 121 (1235) ◽  
pp. 73-94 ◽  
Author(s):  
A. Castrichini ◽  
V. Hodigere Siddaramaiah ◽  
D.E. Calderon ◽  
J.E. Cooper ◽  
T. Wilson ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Preliminary Investigation ◽  
Aircraft Design ◽  
Dynamic Loads ◽  
Induced Drag ◽  
Aeroelastic Model ◽  
Static And Dynamic Loads ◽  
Folding Wing ◽  
Wing Tips ◽  
Wing Tip

ABSTRACTA recent consideration in aircraft design is the use of folding wing-tips with the aim of enabling higher aspect ratio aircraft with less induced drag while also meeting airport gate limitations. This study investigates the effect of exploiting folding wing-tips in flight as a device to reduce both static and dynamic loads. A representative civil jet aircraft aeroelastic model was used to explore the effect of introducing a wing-tip device, connected to the wings with an elastic hinge, on the load behaviour. For the dynamic cases, vertical discrete gusts and continuous turbulence were considered. The effects of hinge orientation, stiffness, damping and wing-tip weight on the static and dynamic response were investigated. It was found that significant reductions in both the static and dynamic loads were possible. For the case considered, a 25% increase in span using folding wing-tips resulted in almost no increase in loads.

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