scholarly journals ANALISIS DINAMIS RIWAYAT WAKTU JEMBATAN GANTUNG AKIBAT PEJALAN KAKI DAN KENDARAAN RODA DUA

2018 ◽  
Vol 1 (4) ◽  
pp. 869-876
Author(s):  
Sarwo Edhi ◽  
Muttaqin Hasan ◽  
Husaini Husaini
Keyword(s):  
Dynamic Analysis ◽  
Moving Load ◽  
Time History ◽  
Suspension Bridge ◽  
Force Model ◽  
Element Analysis ◽  
British Standard ◽  
Analysis And Design ◽  
Direct Integration Method ◽  
Span 60

Abstract : Suspended footbridges has a lot of constructed in Indonesia to access many–especially rural-regions. Due to its flexiblity, understanding and design of the suspension bridge is not enough to rely on static analysis. This paper deal with the dynamic behaviour of simply unstiffening suspended bridges subjected to pedestrian load and motor-cycles moving load.As the SNI 03-3428-1994 codeof the technical planning for pedestrian suspension bridge is not set in consideration of dynamic analysis and design,pedestrian-load model is based on British Standard BS 5400-4: 1990 and Eurocode EN1991-2:2003. Modeling pedestrian load is done in three conditions; single pedestrian, group, and crowd. The motor-cycles moving load is modeled as a moving force model, accurate for low speed. Variations in the speed used was 10 km / h, 20 km / h, 30 km / h are considered representative. Dynamic analysis done by the time history Newmark direct integration method with the help of finite element analysis program SAP2000 v.15. Span 60 m, 80 m and 100 m was studied. As these results, dynamic interaction between the bridges and pedestrian load is not significant.The analyses have shown that the responses greatly differ between the British Standard and Eurocode.However, motor-cycle load has same results but higher  with the largest DAF value 7.27% for speeds of 30 km / h interval of 2 seconds on a span of 100 m. Abstrak: Jembatan gantung pejalan kaki telah banyak sekali dibangun di Indonesia, sebagai pemecah masalah akses antar wilayah. Dikarenakan strukturnya yang fleksible, pemahaman dan desain jembatan gantung tidak cukup sekedar mengandalkan analisis statis. Tujuan penelitian ini adalah untuk memperlihatkan respons dinamis jembatan gantung pejalan kaki sederhana tanpa pengaku. Hal yang akan dipelajari adalah simpangan vertikal dan percepatan ditinjau dari sisi kenyamanan. Beban yang dikenakan adalah beban pejalan kaki dan kendaraan roda dua. Dikarenakan SNI 03-3428-1994 Tata cara perencanaan teknik jembatan gantung untuk pejalan kaki tidak mengatur analisis dinamis dalam pertimbangan analisis dan desain, pemodelan beban pejalan kaki didasarkan pada British Standard BS 5400-4:1990 dan Eurocode EN1990. Pemodelan beban pejalan kaki dilakukan dalam tiga kondisi; pejalan tunggal, pejalan kelompok, dan arus keramaian. Untuk beban kendaraan dimodelkan sebagai beban berjalan yang cukup akurat untuk kecepatan rendah. Variasi kecepatan yang digunakan adalah 10 km/jam, 20 km/jam, 30 km/jam dianggap cukup representatif. Analisis dinamis dilakukan secara riwayat waktu dengan metode integrasi langsung Newmark dengan bantuan program analisa elemen hingga SAP2000 v.15. Bentang yang diteliti adalah 60 m, 80 m dan 100 m. Dari hasil tersebut didapati bahwa percepatan akibat beban pejalan kaki masih kecil sehingga tak berpengaruh secara signfikan. Sedangkan beban sepeda motor juga demikian, dengan nilai DAF terbesar 7,27 % untuk kecepatan 30 km/jam selang 2 detik pada bentang 100 m.

The Dynamic Analysis of Self-Anchored Suspension Bridge Based on Ansys

2010 ◽  
Vol 43 ◽  
pp. 594-598
Author(s):  
Bang Sheng Xing ◽  
Changlun Du ◽  
Xue Feng Wang
Keyword(s):  
Dynamic Analysis ◽  
Moving Load ◽  
Suspension Bridge ◽  
The Self ◽  
Suspension Bridges ◽  
Analysis Software ◽  
Intrinsic Frequency ◽  
Transient Dynamic Analysis ◽  
Element Analysis ◽  
The Impact

In this paper Ansys, the difite element analysis software, is used to make model analysis on self-anchored suspension bridges achieve the intrinsic frequency and inherent vibrating mode of its first ten bands. Simutaneously, a transient dynamic analysis is made to research the impact of the deformation of the self-suspension bridge under a moving load with the change of the speed, which will be playing a pivotal role in the design and construction of the self-anchored suspension bridges.

scholarly journals Dynamic Behavior of Steel and Composite Ferry Subjected to Transverse Eccentric Moving Load Using Finite Element Analysis

2020 ◽  
Vol 10 (15) ◽  
pp. 5367 ◽  
Author(s):  
Mohamed N. Lotfy ◽  
Yasser A. Khalifa ◽  
Abdelrahim K. Dessouki ◽  
Elsayed Fathallah
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Load Capacity ◽  
Moving Load ◽  
Load Factor ◽  
Principal Stresses ◽  
Element Analysis ◽  
Software Analysis ◽  
Analysis System ◽  
Von Mises

The most important problems confronted by designers of floating structures are minimizing weight and increasing payload to get proper resistance to the applied loads. In the present study, the structural performance of a ferry is analyzed using both metallic and composite materials as a result of the dynamic load of the Military Load Capacity (MLC) 70 (tank load). The model is composed of sixteen floating pontoons. Finite element simulation and dynamic analysis were performed using ANSYS software (analysis system software), considering a moving MLC70 (tank load). Both concentric and eccentric cases of loading are considered. Draft, deformation, and stresses are obtained and investigated. For the steel ferry, the von-Mises stresses are investigated, while for the composite ferry, the maximum principal stresses are investigated. Furthermore, buckling analysis is performed on the composite ferry and the buckling load factor is determined. The results of the dynamic analysis illustrated that the transverse eccentricity of the moving tank MLC70 must not exceed 0.5 m for a steel ferry while it may reach up to 1.5 m for the composite ferry. This research can also be a useful tool in the design of floating composite and steel ferries.

Shock Analysis and Design Method of Vibration Isolating System in the Time Domain

2005 ◽  
Author(s):  
Yinglong Zhao ◽  
Lin He ◽  
Zhiqiang Lv ◽  
Yu Wang
Keyword(s):  
Dynamic Analysis ◽  
Time Domain ◽  
Design Analysis ◽  
Analysis Method ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Protection Measures ◽  
Analysis And Design ◽  
Shock Protection ◽  
The Time Domain

Choosing the equipment with good shock-resistant performance and taking shock protection measures while designing the onboard settings, the safety of onboard settings can be assured when warships, especially submarine subjected to non-contact underwater explosion, that is, these means can be used to limit the rattlespace (i.e., the maximum displacement of the equipment relative to the base) and the peak acceleration experienced by the equipment. Using shock-resistant equipments is one of shock protection means. The shock-resistant performance of the shock-resistant equipments should be verified in the design phase of the equipments. The shock design analysis methods used before and now includes shock design number method (static g-method), dynamic analysis in the time domain and dynamic design analysis method (DDAM). The FEA (Finite Element Analysis) software, for example, MSC.NASTRAN®, can be used for shock design analysis of the shock-resistant equipments. MSC.NASTRAN are used for shock design analysis of floating raft vibration isolating equipment with dynamic analysis method in the time domain in this paper, and the analysis results are in agreement with the test results. The shock design analysis method used in this paper can be used to analyze the shock-resistant performance of onboard shock-resistant equipments.

scholarly journals Effect of Seismic P-Waves Propagation on Circular Tunnels in Layered Ground

2019 ◽  
Vol 9 (2) ◽  
pp. 2919-2923
Keyword(s):  
Finite Element ◽  
Time History ◽  
Tunnel Lining ◽  
Design Stage ◽  
Element Analysis ◽  
P Waves ◽  
Analysis And Design ◽  
Preliminary Design Stage ◽  
Tunnel Cross Section ◽  
Seismic Forces

During propagation of the compression seismic P-waves, the tunnels are subjected to ovaling deformations. In cases where the soil stiffness is varying along the tunnel cross-section, tunnel lining may take sharper deformed shapes and subjected to magnified bending moments and thrust forces. This paper investigates the effect of the soil stratification on the seismic behavior of circular tunnels under P-waves loading. A 2D finite element models with time history earthquake (EQ) analysis were performed accounting for different tunnel/soil interface slippage conditions. The finite element analysis results were compared with recent analytical solution for calculating the seismic forces of the tunnel lining. The study proved that soil stratification has a great effect on the tunnel seismic forces and it should be considered in the analysis and design. Illustrative curves were presented in this paper to give approximate magnification factors for the anticipated forces. It should be used as a guide in the preliminary design stage.

Stability and Dynamic Analysis of the Spatial Helical Irregular Steel Sculpture

2011 ◽  
Vol 368-373 ◽  
pp. 382-385
Author(s):  
Zhi Hua Chen ◽  
Ren Zhang Yan ◽  
Xiang Yu Yan ◽  
Jing Hai Yu
Keyword(s):  
Dynamic Analysis ◽  
Natural Vibration ◽  
Dynamic Properties ◽  
Time History ◽  
Steel Structure ◽  
Small Time ◽  
Deformation Characteristics ◽  
Analysis Software ◽  
Transient Dynamic Analysis ◽  
Element Analysis

As the shape of the spatial helical irregular steel sculpture is singularly, this paper studies the structure’s stability and dynamic properties with finite element analysis software in order to determine its ultimate bearing capacity, The structure’s natural vibration characteristics are obtained by modal analysis. The structure’s deformation characteristics within a small time history is also obtained by transient dynamic analysis. Feasibility of the new irregular steel structure is verified by calculation and analysis in this article which can lay the foundation for the development of the irregular steel structure.

Dynamic Analysis of Cold-Formed Steel Villa

2013 ◽  
Vol 438-439 ◽  
pp. 1533-1536
Author(s):  
Jian Fu ◽  
Xiao Na Sun ◽  
Rong Huang
Keyword(s):  
Finite Element Analysis ◽  
Dynamic Analysis ◽  
Time History ◽  
Reference Value ◽  
Analysis Software ◽  
Element Analysis ◽  
Vibration Period ◽  
The Finite Element Analysis ◽  
Cold Formed Steel ◽  
Dynamic Time

In this paper, the finite element analysis software ANSYS is used for modal analysis and dynamic analysis of a cold-formed steel villa to calculate its natural frequency, vibration period and dynamic time history curves. The analysis provides a basis for cold-formed steel villas design and has a certain reference value for similar projects.

Static and Transient Stress Analysis of an Elastic Oil Sump

2012 ◽  
Vol 157-158 ◽  
pp. 810-817
Author(s):  
Shuai Wang ◽  
Zong De Liu ◽  
Bin Li ◽  
Peng Duan
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Equivalent Stress ◽  
Time History ◽  
Element Model ◽  
Vital Role ◽  
Hydropower Plant ◽  
Software Performance ◽  
Element Analysis ◽  
Stiffness Properties

As an important supporting component of thrust bearing of hydropower plant, the elastic oil sump plays a vital role in the safe operation of the hydropower plant. Considering the complicated working conditions of the elastic oil sump, it is of great significance and convenience to use a method of CAE to simulate the actual working state of it. In literature, many researchers have investigated static behaviors of the elastic oil sump. However, a dynamic analysis of the oil sump has been seldom investigated formally yet. Therefore, in this study we particularly focused on investigating the dynamic behaviors of a single corrugated elastic oil sump. In this study, the finite element model of the studied oil sump is built with reasonable simplifications of the working status. Then, static and dynamic analyses of a single corrugated elastic oil sump are performed by the means of ANSYS software. Performance parameters of the sump, the initial oil pressure and dangerous region are determined through the static analysis. In the dynamic analysis, the time-history curves of VM equivalent stress and 1st /2nd/3rd principal stress of a tracked node in the crucial region are obtained. The results showed that the method of finite element analysis (FEA) suits well in the study of the stiffness properties of the elastic oil sump and the stress cycle is big enough to induce fatigue damage to which should be paid close attention.

Analysis of runway pavement response under aircraft moving load by FEM

2018 ◽  
Vol 16 (2) ◽  
pp. 233-243 ◽  
Author(s):  
Gholamali Shafabakhsh ◽  
Ehsan Kashi ◽  
Mojtaba Tahani
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Moving Load ◽  
Test Facility ◽  
Actual Behavior ◽  
Element Analysis ◽  
Content Type ◽  
Airport Pavement ◽  
Circular Layer ◽  
Pavement Response

Purpose Given the importance of airports and the need to develop this issue in runway, the purpose of this study, pavement response values under loading of different aircraft have been obtained using tire and pavement modeling by finite element method (FEM). To predict the actual behavior of pavements under aircraft loading, dynamic analysis of runway flexible pavement was performed using Abaqus software version 6.10. Design/methodology/approach The method is based on finite element analysis and software simulation. And the main goal to obtain the amount of pavement stress and deflection at different speeds. Findings The results of modeling showed that aircraft movement at a speed of 5-8 km/h leads to the highest stresses and deflections in the pavement. Moreover, the effect of elastic modulus variations of the asphalt concrete on the tensile strain under advisory circular layer was calculated for Airbus A380 by using FEM. To validate the results of the runway pavement dynamic analysis, the results of modeling have been compared with the field test results of National Airport Pavement Test Facility. Originality/value Stresses and deflections of pavement during aircraft movement at different speeds of 5, 8 and 20 km/h on the runway have been presented, and the critical points in length, width and depth of runway pavement, as well as the most critical speed of aircraft in terms of induced damage to the pavement, have been obtained.

scholarly journals Dynamic analysis of cable stayed bridge with various patterns of pylon

2021 ◽  
Vol 304 ◽  
pp. 02005
Author(s):  
Sreerag S Kallingal ◽  
Priyanka Singh
Keyword(s):  
Dynamic Analysis ◽  
Seismic Analysis ◽  
Moving Load ◽  
Time History ◽  
Bending Moment ◽  
Cable Stayed Bridge ◽  
Axial Forces ◽  
Structure Changes ◽  
History Analysis ◽  
The Aesthetic

The construction of cable stayed bridge increase day by day. The reason behind this is because of the aesthetic beauty and the uniqueness in the structure. This work deals with the study of dynamic analysis of cable stayed bridge with different pylon arrangements. The cable transmits the reaction forces of deck to pylon. Pylon transmits the load of cable to foundation. The pylons ‘H’ shape, ‘Inverted Y’ shape, ‘Diamond’ shape & ‘Needle’ shape arrangement were considered. The MIDAS CIVIL software is used to model and analysis of the cable stayed bridge with various pylon arrangements. The materials and section properties of all four bridges are kept same and the moving load is provided as per IRC:6-2000 loading. In the part of seismic analysis, the time history analysis done and took data of 1940 El Centro earthquake so the nonlinear dynamic behaviour of four bridges investigated. A variety of parameter like, axial forces, displacement and bending moment are analysed. From the result, when complexity increases the behaviour of structure changes. Eventually, the results are compared and concluded that which pattern of pylon shows higher and least performance.

Sign in / Sign up

Export Citation Format

Share Document