Results 31 to 40 of about 379,899 (332)

Harmonic chirp imaging method for ultrasound contrast agent [PDF]

open access: yes, 2005
Coded excitation is currently used in medical ultrasound to increase signal-to-noise ratio (SNR) and penetration depth. We propose a chirp excitation method\ud for contrast agents using the second harmonic component of the response.
Associate Member   +5 more
core   +5 more sources

Axial Compression Performance and Residual Strength Calculation of Concrete-Encased CFST Composite Columns Exposure to High Temperature

open access: yesApplied Sciences, 2022
Concrete-encased concrete-filled steel tube (CFST) composite columns provide high bearing capacity, good seismic performance and an easier connection with arbitrary angle beams, which are widely used in high-rise buildings. Considering the high frequency
Xiaojun Ke   +3 more
semanticscholar   +1 more source

Research on axial compression performance of concrete columns with angle steel embedded in BMSCC stay-in-place formwork

open access: yesCase Studies in Construction Materials, 2023
A new type of stay-in-place formwork column (SFC) was proposed. The square prefabricated shell was made of basic magnesium sulfate cement based composite (BMSCC) and reinforced by angle steel frame. The SFC can be formed after ordinary concrete is poured.
Xiaodong Wang, Fengjun Ren
doaj   +1 more source

Vertical facing panel-joint gap analysis for steel-seinforced soil walls [PDF]

open access: yes, 2016
This paper reports the results of a numerical parametric study focused on the prediction of vertical load distribution and vertical gap compression between precast concrete facing panel units in steel-reinforced soil walls ranging in height from 6 to 24 ...
Bathurst, Richard   +3 more
core   +2 more sources

Behaviour and design of composite beams subjected to negative bending and compression [PDF]

open access: yes, 2012
This paper investigates the behaviour of steel–concrete composite beams subjected to the combined effects of negative bending and axial compression. Six full-scale tests were conducted on composite beams subjected to negative moment while compression was
Kirkland, Brenadan   +3 more
core   +1 more source

Experimental and numerical studies of ferritic stainless steel tubular cross sections under combined compression and bending [PDF]

open access: yes, 2015
An experimental and numerical study of ferritic stainless steel tubular cross sections under combined loading is presented in this paper. Two square hollow section (SHS) sizes—SHS 40×40×240×40×2 and SHS 50×50×250×50×2 made of Grade EN 1.4509 (AISI 441 ...
Gardner, L, Rossi, B, Young, B, Zhao, O
core   +1 more source

EXPERIMENTAL STUDY AND SIMULATION ON AXIAL COMPRESSION OF LAMINATED CELLULAR CYLINDRICAL SHELL (MT)

open access: yesJixie qiangdu, 2023
Experimental tests and finite element simulation methods were used in this article. The bearing loads and deformation failure modes of laminated cellular cylindrical shell under axial compression loads were studied.
HE Pu   +3 more
doaj  

Buckling of built-up columns of pultruded fiber-reinforced polymer C-sections [PDF]

open access: yes, 2014
This paper presents the test results of an experimental investigation to evaluate the buckling behavior of built-up columns of pultruded profiles, subjected to axial compression.
Carlo Casalegno   +8 more
core   +1 more source

Experimental study on axial compression for composite hollow column of steel fiber, high-strength lightweight aggregate concrete and angle steel

open access: yesScientific Reports, 2022
In order to study the axial compression performance for composite hollow column of steel fiber, high-strength lightweight aggregate concrete and angle steel, the axial compression tests were carried out on five composite hollow columns of steel fiber ...
Zehui Xiang   +3 more
doaj   +1 more source

Nonlinear finite element and analytical modelling of reinforced concrete filled steel tube columns under axial compression loading

open access: yesResults in Engineering, 2023
Local buckling of steel and excessive spalling of concrete have necessitated the need for the evaluation of reinforced concrete columns subjected to axial compression loading.
Haytham F. Isleem   +5 more
doaj   +1 more source

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