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A new empirical equation of shear wave velocity to predict the different peak surface accelerations for Jakarta city

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Geodesy and Geodynamics 2020年第6期11卷 455-467页

作者： Munirwansyah Munirwansyah Mohamad Ali Fulazzaky Halida Yunita Reza Pahlevi Munirwan Jonbi Jonbi Kasni Sumeru Faculty of Engineering Universitas Syiah KualaJalan Syekh Abdur Rauf No.7DarussalamBanda Aceh23111Indonesia Department for Management of Science and Technology Development Ton Duc Thang UniversityNo.19Nguyen Huu Tho StreetTan Phong WardDistrict 7Ho Chi Minh CityViet Nam Faculty of Environment and Labour Safety Ton Duc Thang UniversityNo.19Nguyen Huu Tho StreetTan Phong WardDistrict 7Ho Chi Minh CityViet Nam Department of Civil Engineering Faculty of EngineeringPancasila UniversityJalan Raya Lenteng Agung Timur No.56-80Srengseng SawahJagakarsaJakarta12640Indonesia Department of Refrigeration and Air Conditioning Politeknik Negeri BandungGegerkalong HilirCiwarugaBandung 40012Indonesia

Site condition and bedrock depth play important roles in the determination of peak surface acceleration(PSA)values by earthquake *** soil parameters of shear wave velocity(Vs)and standard penetration test-number(N)value for Jakarta city are available up to 100 m below the Earth’s surface even though the typical depths to bedrock are in excess of 100 *** study referred to the base motion peak ground acceleration(PGA)values of 0.100 g,0.218 g and 0.378 g to predict the PSA values using the Nonlinear Earthquake site Response Analysis(NERA)to analyse a simulated dataset for the bedrock depths of 100 m,200 m,300 m,400 m and 500 m with conditioned by clayey and sandy soils.A new empirical equation of Vs=102.48 N0.297(m/s)was proposed to calculate the values of Vsused as an input parameter in the NERA programme for the prediction of seismic wave *** results showed that the PSA values are dependent on the amplitude of seismic waves,depths of bedrock and the local site *** in the PSA values from 41.0%to 51.5%and from 46.1%to 79.8%for the bedrocks overlain by sand,from 20.0%to 42.1%and from 45.9%to 58.8%for the bedrocks overlain by clay with increasing of bedrock depths from 200 m to 300 m and from 400 m to 500 m,respectively,were predicted for a 2500-year return period *** in the PSA values by 41.0%,51.5%,46.1%,79.8%for the bedrocks overlain by sand and by 20.0%,42.1%,45.9%,58.8%for the bedrocks overlain by clay were predicted for a 2500-year return period earthquake due to the bedrock depth changes of 200 m,300 m,400 m,500 ***-magnitude earthquake of Jakarta city has a significant effect on an increase or a decrease of the PSA value with depth of bedrock and may cause the vibration damage to buildings and other constructions on the *** analysis of the PSA value and PSA ratio influenced by the PGA value,bedrock depth and local soil conditions will make a contribution to the design of earthquake-safe building f

关键词： Bedrock depth Clayey soil Jakarta city Peak ground acceleration Peak surface acceleration Sandy soil

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Properties of Wear Rate of Composites Made of Carbon Powder with a Matrix of Waste Glass

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材料科学与工程（中英文A版） 2012年第11期2卷 669-676页

作者： Agus Edy Pramono Indriyani Rebet Sidiq Ruswanto Anne Zulfia Johny Wahyuadi Soedarsono Mechanical Engineering Department Politeknik Negeri Jakarta Kampus UL Depok 16425 West Java Indonesia Department of Metallurgy and Materials Engineering Universitas Indonesia Kampus UI Depok 16424 West Java Indonesia

This paper reveals the wear rate of composite made of carbon powder and waste glass bottle as a adhesive matrix. The study was started by grinding and sifting the coconut shell carbon and waste glass bottles to reach the mesh sizes of 100, 150, 200, and 250. The two materials were mixed with the composition ratio of 70% carbon of weights and glass 30% of weights. The mixture was mixed with coal tar pitch adhesive and compacted simultaneously heated to 150 °C for 30 minutes in the mold. Furthermore, the composite samples were heated in a curing temperature pyrolysis at 1,100 °C in a vacuum furnace and held for 30 minutes. The rate of wear test results showed that the composite made of powder size of 100 mesh produced wear rate 2.77901E-05 mm3/Nm, composite made of powder of 150 mesh size produced wear rate 2.20224E-05 mm3/Nm, composite made of powder of 200 mesh size produced wear rate 1.98792E-05 mm3/Nm, composite made of powder with mesh size of 250 produced wear rate 1.01562E-05 mm3/Nm. These results indicated that the smaller the size of the powder, the lower the wear rate of the carbon-glass composite.

关键词：复合材料磨损率废玻璃碳粉粉末粒度矩阵属性网目尺寸

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