Interaction between patch loading, bending moment, and shear stress in steel girders

The traditional elastic theory believes that there exists normal stress in pure bending body (PBB) and shear stress in pure torsion body (PTB). However, the author proved that there is no normal stress but ‘Bent Point Moment’ (BPM) in PBB. And it also concluded that there is no shear stress but ‘Shear Point Moment’ (SPM) in PTB. This article overturns the preliminary theorems of the Elasticity Theory, which believes that the value of the moment (Bending moment & Torsion moment) on a unit area converges to zero. Just as the completely different natural frequencies of the forced vibration can lead to completely different resonant conditions. Besides, this theory has also been validated in the Damage Mechanics National Key Laboratory of Tsinghua University. Therefore, it is significant to avoid destruction produced by resonance.

Download Full-text

Stresses in a Reinforced Monocoque Cylinder Under Concentrated Symmetric Transverse Loads

Journal of Applied Mechanics ◽

10.1115/1.4009397 ◽

1944 ◽

Vol 11 (4) ◽

pp. A235-A239

Author(s):

N. J. Hoff

Keyword(s):

Shear Stress ◽

Stress Distribution ◽

Cross Section ◽

Maximum Shear Stress ◽

Circular Cross Section ◽

Bending Moment ◽

Normal Stress Distribution ◽

Transverse Loads ◽

Conventional Analysis ◽

Analysis Application

Abstract The stresses in the sheet covering, stringers, and rings of a reinforced monocoque cylinder of circular cross section are calculated for the case of a loading consisting of concentrated symmetric forces applied to the rings in the planes of the rings. The conventional assumptions of a linear normal stress distribution and a corresponding shear-stress distribution in the bent cylinder are replaced by a least-work analysis. Application of the theory to the numerical example of a cantilever monocoque cylinder yields a maximum shear stress in the sheet covering and a maximum bending moment in the ring amounting to 900 per cent and 33 per cent, respectively, of the values obtained by the conventional analysis.

Download Full-text

Interface Shear Stress Analysis of Concrete Beam Strengthened with CFRP

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.1348 ◽

2011 ◽

Vol 71-78 ◽

pp. 1348-1353 ◽

Cited By ~ 1

Author(s):

Yong Chao Zhou ◽

Tie Jun Sun

Keyword(s):

Shear Stress ◽

Stress Analysis ◽

Concrete Beam ◽

Concrete Beams ◽

Bending Moment ◽

Failure Model ◽

Interface Shear ◽

Concentrated Load ◽

Interface Shear Stress ◽

Basic Assumptions

Based on elastic theory, the four basic assumptions and the failure model of concrete beams strengthened with CFRP, deduced the formulae about the concrete beams strengthened with CFRP with concentrated load. Results show the biggest interface shear stress is at the at the anchor end, it not only relate to the material property of CFRP and concrete, but also to the thickness, width and bending moment at the anchor end etc.. Reducing CFRP stiffness and thickness or increasing viscose layer thickness, these can reduce the maximum interface shear stress at the end of anchoring.

Download Full-text

3D Seismic Dynamical Response Time Interval Analysis of Different Segment Length of Wharfs

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.4544 ◽

2011 ◽

Vol 243-249 ◽

pp. 4544-4552

Author(s):

Cai Hua Shen ◽

Xiao Feng Chen ◽

Xing Wei Niu

Keyword(s):

Shear Stress ◽

Interval Analysis ◽

Bending Moment ◽

Relative Displacement ◽

Segment Length ◽

Seismic Load ◽

Time Interval ◽

Dynamical Response ◽

Dynamical Interaction ◽

Terminal Structure

Considering the effect of the actual landform and the pile-soil dynamical interaction, this paper uses the dynamic time interval analysis to analyze the response of horizontal seismic load of different segment lengths of high-piled wharfs. It makes research on the relative displacement, the acceleration, the maximum stress and the shear stress of the wharf construction and the variation of the shear force, the bending moment and the torque of the pile in the action of acceleration in true earthquake records. It determines the reasonable subdivision length of high-piled wharf in actual coast. Calculations show that, the wharf torsion caused by the asymmetry of terminal structure and pile, and the uneven stratum facilitates the response, and increases the shear stress of the pile. The placement of piles and the uneven stratum are the main factors of the internal force of terminal structure in action of earthquake, The optimal design of partial reinforcement should be adopted due to the considerable shear stress on the bezel panel. This method can provide reference to the design of the terminal structure in deep sea as well.

Download Full-text

Analysis of material non-linearity of steel girders subjected to patch loading

Tehnicki vjesnik - Technical Gazette ◽

10.17559/tv-20160524114854 ◽

2017 ◽

Vol 24 (6) ◽

Keyword(s):

Steel Girders ◽

Patch Loading

Download Full-text

Reexamination of Steady Solutions of a Collapsible Channel Conveying Fluid

Journal of Biomechanical Engineering ◽

10.1115/1.2794213 ◽

1995 ◽

Vol 117 (4) ◽

pp. 492-494 ◽

Cited By ~ 3

Author(s):

Yuji Matsuzaki ◽

Kyozo Fujimura

Keyword(s):

Shear Stress ◽

Tube Wall ◽

Bending Moment ◽

Wall Tension ◽

Shearing Force ◽

Static Behavior ◽

Transverse Shearing ◽

Restoring Forces ◽

Steady Solutions ◽

Conveying Fluid

The objective of this note is to reexamine the static behavior of a 2-D channel conveying fluid, when the wall tension becomes small or zero at some point along the channel. In addition to the shear stress exerted by the fluid flow, we take into account restoring forces acting on the wall, such as the bending moment, the transverse shearing force, etc., which have often been neglected in the equation of equilibrium of the tube wall. Numerical results show that zero wall tension does not mean nonexistence of steady solutions. When the wall tension becomes small, it is important to derive the equation of equilibrium by taking into account those terms which have been neglected in comparison with strong effect of the wall tension in physiological vessels.

Download Full-text

Analisis Kekuatan Stabilizer Bar (Anti-Roll Bar) Pada Kendaraan Roda Empat Menggunakan Bantuan Software Solidworks

Jurnal Rekayasa Energi dan Mekanika ◽

10.26760/jrem.v1i2.77 ◽

2021 ◽

Vol 1 (2) ◽

pp. 77

Author(s):

Iwan Agustiawan ◽

Ardi Adhiguna Riyadhi

Keyword(s):

Shear Stress ◽

Maximum Shear Stress ◽

Bending Moment ◽

Vehicle Body ◽

Regression Equations ◽

Safety Factors ◽

Model And Simulation ◽

Body Roll ◽

Materials Used ◽

Static Conditions

Abstrak Stabilizer bar berfungsi mengurangi besarnya sudut rolling, sehingga diharapkan kendaraan lebih stabil. Tujuan yang ingin dicapai dari penelitian ini adalah mengetahui kekuatan stabilizer bar akibat body roll kendaraan dengan pemodelan dan simulasi serta analisis menggunakan bantuan software solidworks. Metode yang digunakan adalah mengidentifikasi karakteristik fisik, beban, tumpuan dan material yang digunakan untuk proses pemodelan serta simulasi sederhana menggunakan software solidworks sehingga dapat memperoleh tegangan geser dan faktor keamanan. Sebagai pembanding terhadap model dan simulasi solidwork, tegangan geser maksimum yang terjadi dihitung secara manual berdasarkan momen puntir dan momen lentur yang bekerja secara simultan dalam stabilizer bar. Hasil penelitian ini menunjukkan bahwa ketika kendaraan mengalami body roll sebesar 3,51° dimana stabilizer bar terpuntir 2,62° dan mengalami tegangan geser dan faktor keamanan dari perhitungan manual, yaitu 52,47 MPa dan 9,39 untuk beban statis, 104,94 MPa dan 4,69 untuk beban dinamis. Berdasarkan analisis menggunakan software solidwork tegangan geser dan faktor keamanan, yaitu 50,05 MPa dan 8,96 untuk kondisi statis, 100,1 MPa dan 4,48 untuk kondisi dinamis. Berdasarkan prediksi menggunakan persamaan regresi linier, maka sudut body roll kritis yang dapat dicapai adalah sebesar 45,99° ketika stabilizer bar mulai mengalami deformasi plastis. Kata kunci : Stabilizer Bar, Anti-Roll Bar, Solidworks Abstract The stabilizer bar functions to reduce the amount of rolling angle, so that the vehicle is expected to be more stable. The purpose of this research is to determine the strength of the stabilizer bar due to vehicle body roll by modeling and simulation and analysis using Solidworks software. The method used is to identify the physical characteristics, loads, supports and materials used for the modeling process and simple simulations using solidworks software so as to obtain shear stress and safety factors. As a comparison to the solidwork model and simulation, the maximum shear stress that occurs is calculated manually based on the torsional moment and the bending moment that work simultaneously in the stabilizer bar. The results of this study indicate that when the vehicle experiences a body roll of 3.51 ° where the stabilizer bar is twisted 2.62 ° and experiences shear stress and safety factors from manual calculations, namely 52.47 MPa and 9.39 for static loads, 104.94 MPa and 4.69 for dynamic loads. Based on the analysis using solidwork shear stress software and safety factors, namely 50.05 MPa and 8.96 for static conditions, 100.1 MPa and 4.48 for dynamic conditions. Based on predictions using linear regression equations, the critical body roll angle that can be achieved is 45.99 ° when the stabilizer bar begins to undergo plastic deformation. Keywords : Stabilizer Bar, Anti-Roll Bar, Solidworks

Download Full-text