Practical Calculus Methods for Flexural Response of Shallow Beam Foundation

2021 ◽  
Vol 118 (4) ◽  
Author(s):  
Giuseppe Campione ◽  
Francesco Cannella ◽  
Maria Zizzo
Keyword(s):  
Flexural Response ◽  
Beam Foundation

Flexural Response of CFRP Prestressed Concrete Box Beams for Highway Bridges

PCI Journal ◽  
2004 ◽  
Vol 49 (1) ◽  
pp. 92-104 ◽  
Author(s):  
Nabil F. Grace ◽  
S. B. Singh ◽  
Mina M. Shinouda ◽  
Sunup S. Mathew
Keyword(s):  
Prestressed Concrete ◽  
Highway Bridges ◽  
Flexural Response ◽  
Box Beams

Vulnerability of Drop Ceilings in Roadway Tunnels to Fire-Induced Damage

2021 ◽  
pp. 036119812110266
Author(s):  
Ziyan Ouyang ◽  
Qi Guo ◽  
Spencer E. Quiel ◽  
Clay J. Naito
Keyword(s):  
Fire Hazard ◽  
Heat Exposure ◽  
Element Analysis ◽  
Passive Protection ◽  
Cooling Period ◽  
Flexural Response ◽  
Standard Fire ◽  
Significant Damage ◽  
The Finite Element Analysis ◽  
Simultaneous Loss

Roadway tunnels often include a reinforced concrete drop ceiling that is hung from the liner to create a plenum that facilitates ventilation and houses utilities. Drop ceiling panels are lightweight compared with the much thicker tunnel liner and can experience significant damage from a fire on the roadway below. This paper examines the flexural response of drop ceiling panels in two representative tunnels to standard fire curves as well as several realistic fires due to vehicular accidents. Standard fire demands as per the Rijkswaterstaat and ASTM E1529 fire curves are uniformly applied to the ceiling panels, and heat exposure contours for typical vehicle fires with heat release rates of 30, 100, and 200 MW are generated from the software CFAST. The finite element analysis software SAFIR is used to evaluate the thermo-mechanical behavior of the ceiling panels when subjected to various thermal demands from the fire below. The analysis results indicate that drop ceiling panels are highly vulnerable to fire-induced damage and potential collapse both during a fire’s active heating phase (from simultaneous loss of capacity and restraint of thermal expansion) and during the subsequent cooling period (from tension that develops when the permanently deformed panel thermally retracts). The potential for fire-induced damage or collapse of the drop ceiling panels can be mitigated by reducing the fire hazard, removing the drop ceiling, or enhancing the fire resistance of the panels via the application of passive protection or structural hardening.

scholarly journals Study of CRFP Shell Structures under Dynamic Loading in Shock Tube Setup

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
H. A. Khawaja ◽  
T. A. Bertelsen ◽  
R. Andreassen ◽  
M. Moatamedi
Keyword(s):  
Shock Tube ◽  
Dynamic Loading ◽  
Test System ◽  
Shell Structures ◽  
Fiber Reinforced Polymers ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Isotropic Shell ◽  
Flexural Response ◽  
Good Agreement

The paper gives the study of the response of carbon fiber reinforced polymers (CRFP) quasi-isotropic shell structures under the influence of dynamic loading. The quasi-isotropic CRFP shell specimens are fabricated using Multipreg E720 laminates. These laminates are laid in such a way that shell structure has equal strength and mechanical properties in the two-dimensional (2D) plane and hence can be regarded as quasi-isotropic. In this study, the dynamic loading is generated using shock waves in a shock tube experimental setup. The strain and pressure data is collected from the experiments. Additional tests are carried out using Material Test System (MTS) for both tensile and flexural response of CRFP. Results obtained from experiments are compared with numerical simulations using ANSYS Multiphysics 14.0 finite element method (FEM) package. The numerical simulation and experimental results are found to be in good agreement.

scholarly journals Dynamic, in situ measurement of sea-ice characteristic length

2001 ◽  
Vol 33 ◽  
pp. 339-344 ◽  
Author(s):  
Colin Fox ◽  
Tim G. Haskell ◽  
Hyuck Chung
Keyword(s):  
Sea Ice ◽  
Characteristic Length ◽  
Ice Sheet ◽  
In Situ Measurement ◽  
Effective Characteristic ◽  
Mcmurdo Sound ◽  
Periodic Loading ◽  
Flexural Response ◽  
Measurement Signal

AbstractWe present a method for measuring the characteristic length of sea ice based on fitting to a recently found solution for the flexural response of a floating ice sheet subject to localized periodic loading. Unlike previous techniques, the method enables localized measurements at single frequencies of geophysical interest, and since the measurements may be synchronously demodulated, gives excellent rejection of unwanted measurement signal (e.g. from ocean swell). The loading mechanism is described and we discuss how the effective characteristic length may be determined using a range of localized measurements. The method is used to determine the characteristic length of the sea ice in McMurdo Sound, Antarctica.

Flexural response of stainless steel reinforced concrete beam

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 589-603
Author(s):  
Khondaker Sakil Ahmed ◽  
Md Ahsan Habib ◽  
Md Farhan Asef
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Steel Reinforced Concrete ◽  
Flexural Response
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