Hasil Pencarian  ::  Simpan CSV :: Kembali

Abstrak :
studi untuk mengetahui pengaruh perubahan variasi parameter lead rubber bearing (lrb) base isolator pada pondasi bangunan nuklir cyclotron telah dilakukan. desain bangunan nuklir cyclotron harus mampu menahan beban gempa tanpa mengalami kerusakan. bangunan nuklir cyclotron selain berfungsi sebagai bangunan struktur juga berfungsi sebagai shielding radiasi sehingga ketahanan terhadap gaya dari luar dalam hal ini gempa harus ditingkatkan. solusi yang bisa dipakai meningkatkan ketahanan bangunan terhadap beban gempa adalah pengunaan base isolator tipe lead rubber bearing (lrb) pada pondasi. analisis numerik telah dilakukan dengan melakukan perubahan variasi parameter dalam hal ini tebal lapisan karet, tebal plat steel dan diameter inti lead untuk melihat pengaruhnya terhadap kekakuan horizontal, kekakuan vertikal serta nilai damping dari isolasi lrb. dilanjutkan dengan analisi dinamik untuk mengetahui effektivitas penggunaan sistem base isolator lrb. hasil penelitian diperoleh bahwa perubahan diameter inti lead, tebal lapisan karet dan tebal plat steel akan mempengaruhi nilai transmibilitas gaya yang diteruskan dari beban gempa ke bangunan dan penggunaan lrb meningkatkan periode getaran bangunan atau dengan cara menurunkan frekuensi natural. hal ini meningkatkan rasio frekuensi yang akan membuat rasio respon pembesaran getaran bangunan menjadi sangat kecil. analisis numerik menggunakan fem abaqus dan solidwork mengungkapkan bahwa penggunaan lrb membuat respon getaran bangunan nuklir cyclotron akibat beban gempa mengalami beban yang kecil baik dalam pergerakan lateral bangunan maupun percepatannya.

---

a study to determine the effect of changes in the variation of lead rubber bearing (lrb) base isolator parameters on the cyclotron nuclear building foundation has been conducted. cyclotron nuclear building design must be able to withstand earthquake loads without experiencing damage. cyclotron nuclear buildings in addition to functioning as structural buildings also function as radiation shielding so that resistance to external forces in this case the earthquake must be increased. the solution that can be used to increase building resistance to earthquake loads is the use of lead rubber bearing (lrb) type base isolators on the foundation. numerical analysis has been done by changing the parameter variations in this case the thickness of the rubber layer, thickness of the steel plate and the core diameter of the lead to see its effect on horizontal stiffness, vertical stiffness and damping value of lrb isolation. followed by dynamic analysis to determine the effectiveness of the use of lrb base isolator systems. results of the study was found that changes in lead core diameter, thickness of rubber layer and thickness of steel plate will affect the value of force transmittance transmitted from earthquake loads to buildings and the use of lrb increases the period of building vibration or by decreasing natural frequency.this increases the frequency ratio which will make the buildings vibration-response response ratio very small. numerical analysis using fem abaqus and solidwork revealed that the use of lrb made the vibrational response of the cyclotron nuclear building due to the earthquake load experience a small burden both in the lateral movement of the building and its acceleration.

Abstrak :
ABSTRACT
ABSTRACT
The process of infrastructure development is being intensively conducted by the government, one of the infrastructure being intensively built is toll roads. Construction of toll roads has its own provisions, one of which is resistant to earthquakes. There are various methods of constructing and modeling of toll roads to avoid damages caused by earthquake, one of them is by using lead rubber bearing LRB in the construction of toll road. LRB consists of rubber rubber, lead and steel steel are arranged in a certain way. LRB will act as seismic isolation that can accommodate the vibration or force caused by the earthquake and also by the vibration due to the use of the highway. The effectiveness of LRB in accommodating vibration depends on the arrangement, material content, and dimensions. Evaluation of the LRB model will be done by spectrum response analysis. The results of the analysis show that the use of LRB can reduce the basic shear force up to 71.31 and reduce moment force up to 68.31.

Abstrak :
Dengan adanya perubahan peraturan SNI 1726 “Standar perencanaan ketahanan gempa untuk struktur bangunan Gedung”, maka bangunan yang lama akan mengalami penambahan beban gempa. Untuk mengembalikan beban gempa ke nilai awal dapat dilakukan dengan menggunakan isolator. Untuk penelitian ini isolator yang digunakan ialah lead rubber bearing dan ditempatkan pada lantai paling atas bangunan lalu menambah beban diatas lead rubber bearing. Objek pada penelitian ini ialah bangunan dengan denah berbentuk L yang akan divariasikan sebanyak 10 model berisolator dan 1 model fix-based. Hasil dari penelitian ini akan menganalisa pengaruh variasi beban dan kekakuan lead rubber bearing terhadap respons struktur bangunan, Analisa yang digunakan ialah Analisa respons spektrum dengan parameter yang dibandingkan meliputi: periode getar, gaya geser tingkat, simpangan antar lantai dan pusat massa. Berdasarkan hasil penelitian menggunakan analisa respon spektrum, penggunaan lead rubber bearing dapat mengurangi gaya geser dasar akibat gempa berkisar antara 19-23 ......With the amendment of SNI 1726 regulation "Standards for planning earthquake resistance for building structures", old buildings will experience additional earthquake loads. In order to restore the earthquake load to the initial value, it can be done using an isolator.The isolator that is used for this study is lead rubber bearing, and it is placed on the top floor of the building and then added an additional load at the top of lead rubber bearing. The object of this study is a building with an L-shaped plan with variation of 10 isolated models and 1 fix based model. The results of this study will analyze the structural response of buildings caused by variations in load and stiffness of lead rubber bearing on. The analysis used in this study was responses spectrum analysis with parameters that being compared covers: period of vibration, story shear, intersection between floor and center of mass. Based on the results of the study using response spectrum analysis, the use of lead rubber bearings can reduce the base shear due to earthquakes ranging from 19-23%.

Abstrak :
Denah L merupakan salah satu denah asimetris tipikal yang sering digunakan berdasarkan pertimbangan sisi arsitektural dan keterbatasan lahan. Namun, terdapat beberapa masalah yang muncul akibat dari penggunaan bentuk denah tersebut terkait dengan kerusakan struktural akibat gempa bumi. Di era teknologi sekarang ini, rekayasa seismik telah menemukan suatu inovasi teknologi dalam menyelesaikan permasalahan struktur konvensional, yang dikenal dengan istilah isolasi dasar. Sistem isolasi dasar telah menjadi ciri utama desain struktural dalam dekade terakhir ini. Dalam penelitian ini, objek yang digunakan berupa isolator jenis lead rubber bearing LRB. Hasil penelitian ini akan membahas perbandingan respon global, rasio tulangan, dan tebal ekivalen beton pada kedua model, baik pada model konvensional maupun model berisolasi dasar. Untuk mencapai objektif penelitian, akan digunakan variasi panjang sayap denah L dan ketinggian bangunan. Sebanyak 18 jenis model diperuntukkan sebagai gedung perkantoran mulai dari 5 hingga 7 tingkat; setengah dari jumlah tersebut akan didesain secara sistem ganda berbasis DBE Design Basis Earthquake dan lainnya akan didesain secara distribusi linier gaya vertikal berbasis target spektrum MCE Maximum Considered Earthquake kota Jakarta kasus tanah lunak. Pada akhirnya, respon utama dinamik pada model berisolasi dasar akan diperoleh hasil yang lebih baik dibanding model konvensional. Lebih jauhnya, dengan penggunaan isolasi dasar dapat menunjukkan penghematan terhadap material tulangan dan beton masing ndash; masing berkisar 4-16 dan 3-5.

---

An 'L' shaped building is one of the typical asymetrical plan being used due to the architectural consideration and limited available area boundaries. However, there are several problems created by these shaped related to structural damage of earthquake. In today rsquo s technological era, seismic engineering has an innovation for thinking advanced technology beyond conventional solutions, called base isolation. Base isolation has become a major feature of structural design in the past decade. In this study, the selected research object is Lead Rubber Bearing LRB . This paper will focus on comparison the global response, rebar ratio, and equivalent thickness concrete of both conditions, either fixed base or base isolated structures. To compelete this research topic, the variation of length of the wings and building height will be introduced. As many as eighteen models are functioned as office buildings starting form 5 to 7 story tall while half of them are fixed base models designed with dual system in DBE Design Basis Earthquake and others are designed using linear distribution lateral forces in MCE Maximum Considered Earthquake target spectra of Jakarta with soft soil condition. In the end, the dynamic main responses of isolated structure may provide better result compared to fixed base structure. Furthermore, the usage of base isolation could lead to the saving effort of rebar and concrete, 4 16 and 3 5 , respectively.

Abstrak :
ABSTRACT
Kebutuhan struktur jembatan untuk tol layang mengalami peningkatan yang pesat. Hal ini disebabkan oleh meningkatnya jumlah kendaraan yang melintas dan mengakibatkan kapasitas lajur jalan tidak mampu untuk memenuhi kebutuhan pengguna jalan. Struktur jembatan memiliki beban mati yang besar sehingga mengakibatkan kebutuhan kapasitas struktur untuk menahan gaya gempa menjadi lebih besar. Kebutuhan kapasitas struktur yang besar menyebabkan dimensi pilar jembatan menjadi lebih besar. Pengurangan dimensi pilar jembatan dapat dilakukan dengan menggunakan sistem isolasi gempa, yang berfungsi untuk meningkatkan periode getar alami dan meningkatkan nilai redaman dari struktur. Peningkatan periode getar alami dan peningkatan nilai redaman struktur mengakibatkan percepatan gempa yang dialami oleh struktur menjadi lebih kecil. Sistem isolasi gempa menggunakan isolator tipe lead rubber bearing, yang dapat memberikan redaman hingga 30. Penelitian ini menyelidiki efek perubahan kekakuan lead rubber bearing yang terjadi akibat faktor lingkungan, efek perubahan ketinggian pilar, dan efek perubahan dimensi pilar terhadap performa lead rubber bearing. Metode analisa yang digunakan untuk penelitian ini adalah analisa riwayat waktu non-linear.

---

ABSTRACT
The need of bridge structure for toll overpass has increased rapidly, due to the increasing number of vehicles and resulting road capacity not being able to meet the needs of road users. Bridge structure has a large dead load resulting the need for its structural capacity to withstand earthquake forces become large. This causes the pier dimension of the bridge to become larger. Reduction of bridge pier dimension can be done by using earthquake isolation system, serves to increase the natural vibration period and increase the damping value of the structure. Increasing the natural vibration period and the damping value of the structure resulted in smaller earthquake acceleration experienced by the structure .The earthquake isolation system uses a lead rubber bearing insulator, which can provide damping up to 30 . This study investigated the effect of lead rubber bearing stiffness caused by environmental factor, pier height change effect, and pier dimension change effect on lead rubber bearing performance. The analytical method used for this research is non linear time history analysis.

Abstrak :
ABSTRAK
Getaran akibat gempa bumi yang terjadi pada gedung Rumah Sakit dapat mengganggu kenyamanan dan operasional Rumah Sakit, serta dapat menimbulkan korban jiwa, dikarenakan respon gedung terhadap gempa adalah respon gerakan cantilever. Respon gerakan cantilever dapat berpotensi menghancurkan gedung Rumah Sakit. Solusi dengan menggunakan prinsip getaran mekanis agar gedung Rumah Sakit tidak hancur akibat gempa adalah dengan mengontrol respon getaran yang menghasilkan respon gerakan lateral. Salah satu teknologi yang digunakan untuk meningkatkan ketahanan bangunan untuk menghadapi paparan gempa dan dapat mengontrol respon getaran yang menghasilkan gerakan lateral adalah base isolation. Base isolation yang digunakan pada fondasi gedung Rumah Sakit bertingkat tinggi adalah high damping rubber bearing dan lead rubber bearing. Dari hasil simulasi dengan menggunakan ANSYS, base isolation tipe high damping rubber bearing dapat menghasilkan respon gerakan lateral.

---

ABSTRACT
Vibration due to earthquakes that occur in the Hospital building can disrupt the comfort, operation of the Hospital, and can cause casualties, because the building response to the earthquake is the cantilever movement response. The cantilever movement response can potentially destroy the Hospital building. The solution using the principle of mechanical vibration so that the Hospital building is not destroyed by the earthquake is by controlling the vibration response which results in a lateral movement response. One technology that is used to increase the resilience of building that subjected to the earthquake and can control vibration response that produce lateral movement is base isolation. Base isolation used in high-rise Hospital building foundation is high damping rubber bearing and lead rubber bearing. From the simulation results using ANSYS, base isolation type high damping rubber bearing can produce lateral movement response.