IMAN, MUHAMMAD FARID NURUL (2017) PERILAKU INELASTIK STRUKTUR GEDUNG STAGGERED TRUSS FRAMING DENGAN REDUCED BEAM SECTION PADA ELEMEN VIERENDEEL DENGAN VARIASI JUMLAH LANTAI MENGGUNAKAN ANALISA NONLINIER BEBAN DORONG. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sistem staggered truss framing (STF) merupakan salah satu sistem struktur alternatif tahan gempa. Keunggulan dari sistem ini yang bisa dimanfaatkan, yaitu konsep penempatan kolom eksterior saja dan tata letak yang selang-seling tiap lantai yang menyediakan spasi ruangan yang cukup luas. Sistem ini juga menggunakan material baja yang sifatnya mempunyai banyak keunggulan untuk sistem struktur tahan gempa. Selain itu dengan komponen-komponen strukturnya yang didapat dari proses fabrikasi (precast) membuat waktu konstruksi menjadi yang lebih cepat. Oleh karena itu, sistem staggered truss framing (STF) ini sesuai untuk konstruksi bangunan hunian massal yang bersifat tipikal dan simetris seperti apartemen, hotel, dormitory, dan kondominium. Terutama di Negara Indonesia, yang sekarang ini memprioritaskan konstruksi hunian massal secara vertikal karena keterbatasan lahan. Selain itu juga Indonesia merupakan wilayah yang berpotensi gempa yang cukup tinggi.
Pada sistem staggered truss framing (STF) terdapat elemen vierendeel panel yang biasanya digunakan sebagai koridor jalan penghubung antar ruangan. Elemen vierendeel panel memiliki peranan penting dalam mekanisme keruntuhan pada sistem Staggered Truss Frame (STF). Studi ini bertujuan untuk mengetahui pengaruh Reduced Beam Section (RBS) pada elemen vierendeel panel terhadap perilaku inelastik gedung STF berdasarkan analisa beban gempa.
Sistem STF diaplikasikan sebagai gedung perkantoran pada daerah gempa tinggi dan tanah keras dengan variasi 4, 6, dan 10 lantai. Konfigurasi struktur vierendeel menggunakan nilai perbandingan lebar vierendeel dan jarak antar vertical truss sebesar 1,6. Sistem struktur yang digunakan yaitu sistem Special Moment Resisting Frame (SMRF) pada arah longitudinal (B-T) dengan faktor gempa 8, dan sistem STF pada arah transversal (U-S) dengan faktor gempa 7. Analisa yang digunakan yaitu analisa nonlinier beban dorong (pushover).
Dengan adanya RBS menunjukkan bahwa dengan bertambahnya jumlah lantai, nilai daktilitas struktur meningkat di kedua arah U-S (portal STF) dan arah B-T (portal SMRF). Energi disipasi yang mampu diserap juga meningkat terutama pada arah U-S. Mekanisme keruntuhan struktur terjadi pelelehan pertama kali pada vierendeel panel, kemudian diikuti oleh diagonal dan vertical truss serta chord di sekitar vierendeel panel dengan kondisi kritis masih pada tingkat immediate occupancy dan life safety.
Kata kunci: reduced beam section , staggered truss framing , special moment resisting frame , vierendeel panel, truss, pushover.
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Staggered truss framing system (STF) is one alternative for earthquake proof structural system. The advantage of this system is the concept of exterior column placement and criss-crossed layout on every floor which provides a relatively bigger floor space. This system also uses steel as a material where its characteristics has many advantages for earthquake proof structural systems. Other than that, with its structural components which can be fabricated (pre-cast) this method reduces time of construction. Therefore, this staggered truss framing (STF) system is perfect for mass residential construction which are typical and symetrical such as apartments, hotels, dormitories, and condominium. It is especially beneficial for Indonesia which is currently prioritizing the construction of such vertical residential buildings due to a decrease of land availability. Other than that, Indonesia is situated in an area with a relatively high earthquake potential.
In the staggered truss framing system (STF) there are structure elements called vierendeel panel which is usually used as a corridor that connecting all accesses between room. Vierendeel element panel has an important role in the mechanism of the collapse process of the system Staggered Truss Frame (STF). This study aims to determine the effect of Reduced Beam Section (RBS) on a panel vierendeel element of the inelastic behavior of STF based on seismic loads analysis.
This thesis will study the effects of reduced beam section on the vierendeel towards the behavior of STF inelastic system due to seismic loads. The configuration of the vierendeel uses the ratio value between width of vierendeel and distance between vertical truss of 1,6. STF system is applied on structures with a variation of 4 floors, 6 floors, and 10 floors. STF system applied on the tranversal side (North – South) with seismic factor of 7, whilst for the longitudinal direction (West –East) uses Special Moment Truss Moment system with seismic factor of 8. Behavioral evaluation will use nonlinear push over analysis
With the RBS on vierendeel panel showed that by increasing the number of floors, the ductility increased in both directions, the direction N-S (STF system) and the direction W-E (SMRF system). The dissipation energy that can be absorbed also increased, especially in the direction of the N-S. The mechanism of structural collapse occurs first yielding at vierendeel panel, followed by diagonal and vertical truss and chord around vierendeel panel with critical conditions are still at the level of immediate occupancy and life safety.
Key Words: Reduced Beam Section, vierendeel, Staggered Truss Frame, Special Moment Resisting Frame, ductility, nonlinear pushover analysis.
| Item Type: | Thesis (Masters) |
|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) |
| Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering > 22101-(S2) Master Thesis |
| Depositing User: | - MUHAMMAD FARID NURUL IMAN |
| Date Deposited: | 24 Jan 2017 02:46 |
| Last Modified: | 06 Mar 2019 02:24 |
| URI: | http://repository.its.ac.id/id/eprint/2846 |
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