Claim Missing Document
Check
Articles

Found 2 Documents
Search

Perilaku Lentur Panel Beton Semi-Precast pada Daerah Lapangan Tanpa Metode Perkuatan Elemen Pracetak: Tinjauan pada 1, 2 dan 3 Panel Khoiroh, Umi; Siswosukarto, Suprapto; Supriyadi, Bambang
Jurnal Semesta Teknika Vol 12, No 2 (2009): NOVEMBER 2009
Publisher : Jurnal Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A slab where only the lower portion of the floor slab is prefabricated and receives the top layer of floor slab which is cast in situ, in the context of this research is called semi-precast. For small projects, the transportation, storage, and installation of precast units can be a problem. There will be more problem if it is located in congested urban area. For this reason, precast slab panel system in smaller size and weight was introduced. The precast concrete element which is has a rough surface was predicted capable to act as composite, although no shear reinforcement method was used. The objective of this research is to study the characteristic behavior of semi-precast panel without shear reinforcement method on its interface. The characteristic investigated includes flexural capacity, stiffness, ductility, and failure mode of the slab. In this study, the specimens were divided into two groups. The first group is monolith slab that consists of one, two, and three panel(s). Each panel has 120 mm thickness, 3000 mm span length, and 200 mm width of concrete slab. The second group is semi-precast slab that consists of one, two, and three panel(s). Each panel has 70 mm thick precast slab that serves as formwork for 50 mm in situ concrete layer, to form a 120 mm thick of concrete slab. Dimension and shape between semi-precast and monolith slabs are identical. All specimens were tested under static load and failure load. Experimental results revealed that the stiffness of semi-precast slabs is lower than the monolith slab. More number of panels reduced stiffness differences between semi-precast and monolith slab. It also increases the value of stiffness and flexural capacity of the slabs. The failure mode and crack pattern is classified as flexure. Existence of interface plane which is using no shear reinforcement method can decrease the value of stiffness and flexural capacity of the slab. From the results, it is shown that the slip occurred on the semi-precast slab’s interface. It is predicted that the slip was due to the influence of no shear reinforcement on the interface.
EVALUASI RENCANA PEMASANGAN SENSOR STRUCTURE HEALTH MONITORING SYSTEM JEMBATAN PULAU BALANG II Hartono, Juandra; Khoiroh, Umi
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 2 (2021): Volume 11 Nomor 2, September 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i2.549

Abstract

Abstrak Salah satu isu utama dalam setiap penerapan Structure Health Monitoring System (SHMS) jembatan bentang panjang khususnya jembatan Pulau Balang II adalah bagaimana membuat SHMS tersebut dapat diandalkan secara efektif. Penggunaan sensor yang terlalu banyak tidaklah efisien demi mendapatkan informasi yang selengkap-lengkapnya terkait kondisi jembatan. Tujuan utama riset ini adalah untuk menganalisia tipe sensor, posisi penempatan sensor dan jumlah sensor yang akan dipasang pada SHMS jembatan Pulau Balang sesuai kebutuhan sensor yang efektif dan efisien. Pengamatan SHMS meliputi lendutan dek, pylon serta tegangan dek, pylon. Metode penelitian berupa pengamatan langsung di lapangan, analisa data dan diskusi dengan stakeholder jembatan. Dari hasil analisis terdapat 13 jenis sensor yang sebaiknya dipasang pada SHMS Jembatan Pulau Balang dengan total kebutuhan sensor berjumlah 87 buah. Posisi penempatan sensor sebagian besar ada di pylon, kabel dan dek yang disesuaikan dengan tipe jembatan yaitu cable stayed. Untuk sensor gempa disarankan perlu dipasang hal ini dikarenakan wilayah tersebut memiliki seismistis paling rendah yang didominasi oleh tiga zona sesar utama yaitu sesar mangkalihat, sesar tarakan dan sesar maratus oleh karena itu Kalimantan bukanlah daerah yang bebas gempa bumi. Kata kunci: structural health monitoring system (SHMS), sensor, pylon, dek, cable stayed  Abstract One of the main issues in each application of Structure Health Monitoring System (SHMS) in long span bridge particularly Pulau Balang II Bridge is how to make the SHMS effectively dependable. The excessive use of sensors is inefficient in order to obtain complete information regarding the condition of the bridge. The main purpose of this research is to analyze the type of sensor, the position of the sensor placement and the number of sensors that will be installed on the SHMS structure of the Balang Island bridge according to the need for effective and efficient sensors. SHMS observations include deck deflection, pylon and deck stress, pylon. The research method is in the form of direct observation in the field, data analysis and discussions with bridge stakeholders. From the results of the analysis, there are 13 types of sensors that should be installed on the Balang Island Bridge SHMS with a total sensor requirement of 87 units. Most of the sensor placement positions are in the pylons, cables and decks that are adapted to the type of bridge, namely cable stayed. For earthquake sensors, it is recommended to install this because the area has the lowest seismicity which is dominated by three main fault zones, namely the Mangkalihat Fault, Tarakan Fault and Maratus Fault. Therefore, Kalimantan is not an earthquake-free area Keywords: structural health monitoring system (SHMS), sensor, pylon, deck, cable stayed