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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Semesta Teknika Jurnal Rekayasa Sipil
Sri Atmaja P. Rosyidi
Jurusan Teknik Sipil Fakultas Teknik Universitas Muhammadiyah Yogyakarta
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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In Situ Determination Of Layer Thickness And Elastic Moduli Of Asphalt Pavement Systems By Spectral Analysis Of Surface Waves (Sasw) Method Rosyidi, Sri Atmaja P; Ismail, Mohd Azmi; Samsudin, Abdul Rahim; Taha, Mohd Raihan; Rafek, Abdul Ghani; Nayan, Khairul Anuar Mohd
Jurnal Semesta Teknika Vol 8, No 2 (2005): NOVEMBER 2005
Publisher : Jurnal Semesta Teknika

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Spectral analysis of surface waves (SASW) is a non-destructive and in situ method for determining the stiffness profile of soil and pavement sites. The method consists of generation, measurement, and processing of dispersive elastic waves in layered systems. The test is performed on the pavement surface at strain level below 0.001%, where the elastic properties are considered independent of strain amplitude. During an SASW test, the surface of the medium under investigation is subject to an impact to generate energy at various frequencies. Two vertical acceleration transducers are set up near the impact source to detect the energy transmitted through the testing media. By recording signals in digitised form using a data acquisition system and processing them, surface wave velocities can be determined by constructing a dispersion curve. Through forward modeling, the shear wave velocities can be obtained, which can be related to the variation of stiffness with depth. This paper presents the results of two case studies for near-surface profiling of two different asphalt pavement sites. 
Analisis Arus Jenuh dan Panjang Antrian pada Simpang Bersinyal: Studi Kasus di Jalan Dr. Sutomo-Suryopranoto, Yogyakarta Rahayu, Gati; Rosyidi, Sri Atmaja P; Munawar, Ahmad
Jurnal Semesta Teknika Vol 12, No 1 (2009): MEI 2009
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The aim of this paper is to analyse the delay length based on MKJI (1997). A case study was conducted on a signalized junction of Dr.Sutomo-Suryopranoto road, Yogyakarta. The correction was carried out on coefficient of basic saturation flow in ranging from 600 to 2200. Therefore, the predicted (from MKJI 1997) and measured delay length was compared. The results show that the coefficient on basic saturation flow calculation needs to be modified in the range of 600 to 2200 in order to find the similar length of the delay between prediction and field measurement. Passenger car unit (PCU) unit for motorcycle from MKJI (1997) was also corrected from 0.2 to 0.15. 
Korelasi Empirik antara Kecepatan Gelombang Permukaan terhadap Kepadatan dan Kekakuan pada Campuran Laston – WC Rosyidi, Sri Atmaja P; Ariani, Indra; Djaha, Siti Isnaini K
Jurnal Semesta Teknika Vol 17, No 1 (2014): MEI 2014
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Density and stiffness of asphaltic mixture are important parameter used for pavement design and construction. These parameter measure the required thickness of pavement.The aim of this study is to investigate the empirical relationship between pavement density and stiffness of Asphalt Concrete-Wearing Course (AC-WC) and surface wave velocity. Surface wave velocity is obtained from the seismic test set up in laboratory. A high frequency of impact source is employed in order to produce the high frequency waves propagating in mixture samples.The wave displacement is measured by accelerometer receivers connected to the computer for signal processing and spectrum analysis. In this study, AC-WC mixture is prepared with 35×,50×, 75× and 100× blows for providing sample with different density. From the results, it shows that the surface wave velocity is able to detect the various density of samples. Higher density of sample produces higher velocity and vice versa. Some empirical correlations between surface wave velocity with density and stiffness are also produced with significant statistical measures. This study shows the surface wave velocity is potential parameter employed for mixture assessment in pavement design and evaluation. 
Kinerja dan Verifikasi Teknik Seismik Gelombang Permukaan Terintegrasi untuk Pengukuran Modulus Elastisitas Tanah Dasar Rosyidi, Sri Atmaja P
Jurnal Semesta Teknika Vol 13, No 1 (2010): MEI 2010
Publisher : Jurnal Semesta Teknika

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An integrated-spectral analysis of surface waves (ISASW) test has been recently proposed as an alternative technique in pavement evaluation and monitoring. ISASW technique is developed from the spectral analysis of surface wave (SASW) method which has been a well known nondestructive testing (NDT) for geotechnical and pavement structures. Surface wave propagation between a set of receivers were transformed to frequency domain using fast Fourier transform (FFT). Therefore, a phase spectrum was produced for measuring the time lag between receivers. A wavelet filtering on impulse response was used for constructing an enhanced phase spectrum. Using phase different method, an experimental dispersion curve was generated. Inversion analysis based on the 3-D stiffness matrix method was then performed in order to produce the shear wave velocity profile. The elastic modulus of pavement layer was calculated based on the linear elastic theory. In this paper, the performance of ISA SW measurement for determining the elastic modulus of pavement subgrade is presented in this paper. Verification on its elastic modulus obtained from ISASW technique was also conducted by using falling weight deflectometer (FWD) test. The result shows that the dispersion curves obtained in the ISASW test are sensitive to indicate the stiffness change in each layer of a pavement structure. Stiffer layer, i.e., pavement surface layer, can be indetified by the parameter of high frequency and phase velocity range; and vice versa. ISASW technique is also able to comprehensively investigate the elastic modulus of subgrade layer in exisiting pavement without any destruction. A good agreement of elastic modulus of subgrade layer from ISASW and FWD test was also pres ented.
Pengaruh Penggunaan Abu Sekam Padi sebagai Bahan Pengisi pada Campuran Hot Rolled Asphalt terhadap Sifat Uji Marshall Rosyidi, Sri P. Atmaja
Jurnal Semesta Teknika Vol 15, No 2 (2012): NOVEMBER 2012
Publisher : Jurnal Semesta Teknika

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Rice Husk Ash (RHA) has fairly high content of SiO2 and easily obtainable. It is inexpensive since it is the residual waste of the tile or brick combustion process that is not utilized properly. RHA has the potential to be used as filler in Hot Rolled Asphalt (HRA) since it has high flexibility mixture design. The influential characteristic of RHA is that it has fine aggregate fraction. This study aims to discover the physical properties of RHA, the characteristic of the Marshall test properties, the optimum bitumen content, and the economical comparison between the RHA-mixed HRA and the conventional one using stone dust filler. The results of this study indicate that the use of the RHA is able to increase the optimum bitumen content. In terms of economical comparison, the use of RHA as filler material is much more economical than using stone dust as filler.
Model Bangkitan Perjalanan Kerja dan Faktor Aksesibilitas pada Zona Perumahan di Yogyakarta Ersandi, Yuswendra; Munawar, Ahmad; Rosyidi, Sri Atmaja P
Jurnal Semesta Teknika Vol 12, No 1 (2009): MEI 2009
Publisher : Jurnal Semesta Teknika

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The aim of this paper is to develop the mathematical model of home based work-trip generation and to obtain its trip variables influencing the model. Factors of trip accessibility i.e. distance to work, travel time, cost for public transport and cost for private vehicle were also observed in the model. In this study, several households in Griya Taman Asri, Sleman Yogyakarta were chosen for questioner sample in home interview survey. Mathematical model was generated using the multi-linear regression with the dependent variable is work-trip which is affected by nine independent variables. The generated model was then validated by VIF and Anova test. The result shows that the work-trip generation model for Griya Taman Asri was influenced by parameter of the car ownership (X2) and the worker in household (X5). However, all trip accessibility factors considered in this study do not influence to work-trips.
An Integration Of The Seismic Methods In Characterization Of An Unsaturated Granitic Residual Soil Site Rosyidi, Sri Atmaja P; Nayan, Khairul Anuar Mohd
Jurnal Semesta Teknika Vol 9, No 1 (2006): MEI 2006
Publisher : Jurnal Semesta Teknika

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A comprehensive seismic survey encompassing the seismic refraction and the downhole method have been carried out in order to characterize a site of granitic residual soil.  The seismic refraction was found to be useful in the initial modeling of the subsurface and has managed to identify the water table, a bolder and the bedrock level satisfactorily.  From the downhole seismic, P-wave velocity was found to be responsived to lithology and the water table, while the S-wave velocity was found to be able to characterise the residual soil in terms of their weathering grades.  Correlations between the S-wave velocity (Vs) and dynamic shear modulus (Gseis)  were established with the SPT (N) and the static unload reload shear modulus (Gur)of the pressuremeter tests. The relationship of Vs = 2.89N + 167.84 and Gseis (MPa) = 2.39Gur + 36.03 were obtained in this study.  
Analisis Parameter Kecepatan Teoritik Dan Nilai Beda Fase Gelombang Rayleigh Lapisan Aspal Perkerasan Jalan Berdasarkan Teori Perambatan Gelombang Pada Media Yang Homogen Dan Isotropik Rosyidi, Sri Atmaja P
Semesta Teknika Vol 8, No 1 (2005): MEI 2005
Publisher : Semesta Teknika

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The Rayleigh wave is one of seismic waves which generated from the natural and artificial mechanical source in the earth or place on the subsurface, such as landslide, earthquake, explosion, traffic vibration, machine works, etc.  The Rayleigh wave in a possible stratified of homogeneous media is a linear combination of Primary (P) and Vertically Shear (SV) waves, which satisfied the equations of elasticity with zero body forces and zero traction on the boundary of a half-space media.  In the case of a homogeneous isotropic half-space there is a unique mode of the Rayleigh waves which propagates without being sustained by any sources or external loads.  Almost 70 % of wave energy generated from the mechanical sources is the Rayleigh wave energy.  Therefore, it is a potential characteristic of Rayleigh wave that is able to be used in engineering purposes.  One of them is a spectrum analysis that is applied in transportation engineering in order to control the quality of asphaltic material.  The aim of this paper is to predict the Rayleigh wave velocity parameters and phase different value of asphaltic layer based on a fundamental theory of Rayleigh wave propagation in a homogeneous isotopic. The results have been shown that the phase different value in homogenous isotropic media is strongly influenced by field spacing of wave measurement.  The Rayleigh wave velocity parameters were easier obtained using the simple equation considering to various Poisson value. 
Kajian Metode Analisis Gelombang Seismik Permukaan (SASW) untuk Pengembangan Teknik Evaluasi Perkerasan Lentur dan Kaku di Indonesia Rosyidi, Sri Atmaja P.
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 14, Nomor 3, Edisi XXXVI, OKTOBER 2006
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (435.037 KB) | DOI: 10.14710/mkts.v14i3.3949

Abstract

The need of accurate, cost-effective, fast and non-destructive evaluation of Indonesian pavement system is becoming ever important because the rehabilitation and management of roads is becoming increasingly difficult due to the increasing number of aging roads and limited budgets. An important feature of quality assessment of a pavement management system is the ability to determine the current condition and to predict future condition of the pavement. In order to establish the structural capacity of the existing roads, accurate information of the layer elastic moduli and thicknesses are needed. The aim of this paper is to describe the potential technique of the Spectral Analysis of Surface Wave (SASW) method for assessing the dynamic stiffness of constructed pavements. The SASW is a non-destructive in situ seismic technique which is based on the dispersion phenomena of Rayleigh waves in layered media. A set of transient impact source is used to generate Rayleigh wave energy that propagates horizontally near the surface layer of the pavement. Through two vertical accelerometers, the motion of the wave at the range of each frequency is recorded. The phases differences from the cross-power spectrum is then unwrapped and the dispersion curve of the phase wave velocity versus wavelength are then generated. An inversion process is iteratively employed to confirm the experimental dispersion curve from the theoretical model established. The SASW field test in this study was utilized to collect data on flexible and rigid pavement. The wave velocity profiles had shown that the SASW method is able to detect all the distinct layers of pavement units. The dynamic elastic modulus of obtained were found to be useful in the assessment of Indonesian pavement system.Keywords: SASW, dynamic stiffness, flexible and rigid pavement systemPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3949[How to cite: Rosyidi, S.A.P, 2006, Kajian Metode Analisis Gelombang Seismik Permukaan (SASW) untuk Pengembangan Teknik Evaluasi Perkerasan Lentur dan Kaku di Indonesia, Jurnal Media Komunikasi Teknik Sipil, Volume 14, Nomor 3, pp. 224-239] 
Pengaturan Lalulintas Kereta Api di Stasiun Cicalengka untuk Mendukung Pengoperasian Jalur Ganda Kereta Api Bandung-Cibatu Setiawan M, Dian; Devi P, Rahardhita Luthfiana; Rosyidi, Sri Atmaja P
Semesta Teknika Vol 21, No 1 (2018): MEI 2018
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.211205

Abstract

Indonesian Railway Authority plans to build a double railway track between Bandung-Cibatu which is currently the densest service line in Bandung Regency. Cicalengka Station is one of the major stations in this line service. This study aims to plan the train traffic arrangement at Cicalengka Station. The Conflict Rate Matrix Table was used as a simple simulation method to analyse the train journey route (formed, used, conflicted) and the degree of route usage against train frequency. The results showed that the Cicalengka Station on double track system would be passed by 98 passenger trains and planned to have two primary track (II and III) which are used for the direct train journey through the station. Track I, IV, V, and VI are the siding tracks that used for a railway stop. Cicalengka Station is also planned to have a route that is formed and is used each amounted to 10 routes (A to J). The conflict degree is 0.84, and the degree of route usage against train frequency is 0.75. Furthermore, it can be concluded that the percentage of non-conflicted route increased from 16% to 25%.
Co-Authors Abdul Ghani Rafek, Abdul Ghani Abdul Rahim Samsudin, Abdul Rahim Ahmad Munawar Devi P, Rahardhita Luthfiana Gati Rahayu, Gati Indra Ariani, Indra Khairul Anuar Mohd Nayan Mohd Azmi Ismail, Mohd Azmi Mohd Raihan Taha Setiawan, Dian M Siegfried Siegfried Siti Isnaini K Djaha, Siti Isnaini K Wukirasih, Niken Yuswendra Ersandi, Yuswendra