Salah satu metode perkuatan pada elemen struktur seperti balok yang mengalami degradasi kekuatan akibat kebakaran atau korosif pada tulangan adalah dengan penggunaan fiber reinforced concrete (FRP), dalam hal ini digunakan type glass fiber reinforced concrete (GFRP). Dalam riset ini akan membandingkan penelitian terdahulu dimana balok beton bertulang dengan dimensi 150 mm x 200 mm x 3300 mm menggunakan tulangan tarik 3D13 mm dan tulangan geser P8-80/200 mm (BE) dibandingkan dengan balok beton bertulang menggunakan tulangan tarik 3D10 mm dan tulangan geser P8-100/175 mm (BK) serta balok beton bertulang dengan tambahan perkuatan GFRP (BNS). Mutu beton yang digunakan dari hasil pengujian kuat tekan untuk balok eksisting BE yaitu 21.82 MPa sedangkan balok kontrol BK dan BNS menggunakan mutu beton 23.48 MPa, yang berarti mutu dari ketiga variasi balok hampir sama atau mendekati. Hasil uji lentur menunjukkan balok BK memiliki kapasitas ultimate lebih rendah dari balok BE sebesar 19.12%, sedangkan balok BNS mimiliki kuat ultimate lebih besar dari balok BE sebesar 17.28%. Fenomena ini menunjukkan perkuatan dengan GFRP mampu mengembalikan kapasitas beton yang hilang dan lebih baik dari sebelumnya.
Proyek konstruksi merupakan suatu rangkaian kegiatan yang hanya satu kali dilaksanakan dan umumnya berjangka waktu pendek. Divisi pengendalian mutu fisik konstruksi terpisah dengan divisi pengendalian jadwal dan biaya. Pengendalian terhadap mutu fisik konstruksi yang dilakukan secara tersendiri oleh pengawas teknik melalui gambar-gambar rencana dan spesifikasi teknis. Pengendalian jadwal dan biaya dimasukkan dalam divisi manajemen proyek yang mencakup pemantauan kemajuan pekerjaan (progress), reduksi biaya, optimasi, model, dan analisis.Seiring dengan pertumbuhan akan penggunaan jalan, pembangunan dan pengembangan kota Pembangunan Jalan Wilayah Barat Painan – Kambang sangat diperlukan untuk memberikan kemudahan, keamanan, dan kenyamanan bagi penggunanya.. Maka tujuan dari tugas akhir ini adalah membandingkan perencanaan (standar) dengan kenyataan hasil pelaksanaan serta membandingkan biaya yang dikeluarkan untuk pekerjaan yang terlaksana dari proyek (Actual Cost Work Performance), biaya yang seharusnya dikeluarkan untuk pekerjaan (Budgeted Cost of Work Performance) dan biaya yang dijadwalkan / direncanakan (Budgeted Cost of work Schedulle)Dari hasil penelitian yang diperoleh kesimpulan bahwa mengenai hubungan waktu akan diketahui dari perhitungan nilai Indeks Kinerja Jadwal dan Biaya dimana pada bulan Februari sampai dengan Mei kinerja penyelenggaraan proyek lebih baik dari perencanaan, pada bulan Juni dikarenakan pengeluaran lebih besar dari anggaran dan berjalan lebih lambat dari rencana maka pekerjaan selesai terlambat, sedangkan pada bulan Juli kegiatan berjalan sesuai rencana dalam arti pengeluaran lebih kecil dari anggaran / jadwal lebih cepat dari rencana. Besarnya nilai FAC senilai Rp. 4.197.224.804,00 yang kecil daripada anggaran total biaya pelaksanaan senilai Rp. 4.663.541.000,00, maka proyek ini mengalami kerugian sebesar Rp 466.316.196,00.Kata kunci : Earned Value , Analisa Varian, Actual Cost, Budgeted Cost of Work
Jakarta Light Rail Transit (Jakarta LRT) has been planned to be built as one of mass rail-based public transportation system in DKI Jakarta. The objective of this paper is to obtain a mode choice models that can explain the probability of choosing Jakarta LRT, and to estimate the sensitivity of mode choice if the attribute changes. Analysis of the research conducted by using discrete choice models approach to the behavior of individuals. Choice modes were observed between 1) Jakarta LRT and TransJakarta Bus, 2) Jakarta LRT and KRL-Commuter Jabodetabek. Mode choice model used is the Binomial Logit Model. The research data obtained through Stated Preference (SP) techniques. The model using the attribute influences such as tariff, travel time, headway and walking time. The models obtained are reliable and validated. Based on the results of the analysis shows that the most sensitive attributes affect the mode choice model is the tariff.
Steel materials mostly used for high-rise buildings and buildings with wide
spans. In addition to the ability of the steel material large enough to withstand
tensile and compressive, owned ductility properties of steel make this excellent
material used in construction in seismic region like Indonesia. However, because
the price is relatively expensive steel materials it is necessary to be able to obtain
a design that is more economical steel construction and can minimize the use of
steel materials. The aim of this study was to determine the shear behavior of
castellated beam with diagonal stiffener reinforcement and compare with the
results of previous research.
Modification castellated beams with steel reinforcement bracing (BCT)
which is made of steel profiles tested IWF 150x75x7x5 mm straight cut in the
middle of the body, and connecting with steel reinforcement D22, so it becomes
high beams with effective span of 275 mm and 910 mm, referring to the
dimensions of research previously. Setting up static loading test using 2 points at a
distance of 244.5 mm from support. Deformation monitored with LVDT 5, 2
mounted vertically on the bottom of the specimen, 2 pieces mounted horizontally
on the side of the diagonal stiffener, and 1 piece mounted vertically at midspan
position under the profile T top. Imposition done through hydraulic jack with a
gain of 1 kN intervals to exceed Pmaks, and all deflection and strain responses were
recorded. Testing was stopped when the load has decreased 30% from Pmaks.
The results showed the shear capacity of the test specimen BCT
(Reinforcement Modification Castellated Beams) with reinforcing steel stiffeners,
determined by inelastic buckling capacity of the T-section stiffeners and
reinforcing steel that is ductile collapse mechanism. The difference in value
between BCT Pyield with BCH is 30.33%, BCT with BCM is 38.57%, BCT with
BCS was 92%. The difference in value between BCT Pmaks with BCM is 45.29%,
BCT with BCH is 45.7%. For comparison the value of strength to weight ratio
between BCH with BCT approximately 21.9% and the difference between the
BCM and the BCT approximately 29.6%. As for the value of strength to cost ratio
comparison between the BCM BCT, BCH and BCS are respectively 39.3%,
29.6% and 84.2%. In general, addition of a lateral stiffeners reinforcing steel, in
addition to overcome the problem of buckling on the web post, also increase the
shear capacity of castellated beam modification.
This study aims to determine the tariff of Jakarta LRT based on the analysis of ability to pay and willingness to pay for taxi users. The ability to pay value analysis approach uses travel cost method and determination of willingness to pay value using discrete choice analysis. From the analysis results can be seen that the value of the ability to pay is Rp. 63.316 and the willingness to pay value is Rp. 11.500. This indicates that the willingness to pay taxi users is less than the ability to pay.
