Hasil Pencarian  ::  Simpan CSV :: Kembali

Abstrak :
The combination between frames and walls is frequently used in the earthquake resistant design of multistorey reinforced concrete buildings Frames are relatively flexible , it will deform according to the shear mode. Meanwhile walls are usually very stift and it will deform with the flexural one. Accordingly between frames and walls will have a conflict of deformation modes. There is no clear guidance regarding the appropriate ratio between the number of walls and frames. In addition, effects of the rocking foundation to the structural response need to be investigated The seismic behavior of the multistorey reinforced concrete building has been investigated Three types of structure i.e 2 Walls +5 Frames or 2W+5F, 2W+7F and 2W+9F have been used for the structural models. The corresponding structural models are 12- storey buildings with 2 symmetrical beams span and _symmetrical buildings plan. The North-South Component of the 1940 El Centro earthquake record has been used for the input motion. The stifness and damping interaction between the soil and the foundation according to the Lumped ParameterMethod are also used The results of investigation show that the smaller the wall-frame ratio , the bigger the base shear coefficient resisted by walls, the smaller the plastic hinge rotation of the column 's bases, the smaller the total plastic hinge rotation and the hysteretic energy dissipation of every frame. In general, the structural response of the rocking structures are smaller than those the _fixed base structures. The appropriate wall frame-ratio can not be defined definitely without any clear requirement of the design criteria.

Abstrak :
Indonesia termasuk daerah dengan tingkat risiko gempa yang cukup tinggi. Hal ini disebabkan karena wilayah Indonesia berada di antara empat lempeng tektonik yang aktif yaitu lempeng Eurasia, lempeng Indo-Australia, lempeng Filipina, dan lempeng Pasifik. Pada tahun 2011 pemerintah menyusun peraturan perencanaan bangunan tahan gempa yang baru, yaitu SNI 03-1726-2011, untuk menggantikan peraturan sebelumnya SNI 03-1726-2002. Objek pada penelitian ini adalah bangunan tingkat rendah di Jakarta. Struktur dimodelkan secara tiga dimensi dengan menggunakan program ETABS ver. 9.5, dan dengan beban gempa yang diperoleh dari peraturan perencanaan bangunan tahan gempa maka akan diperoleh gaya geser dasar gempa dan simpangan antar lantai bangunan. Hasil yang diperoleh adalah nilai normalisasi gaya geser SNI 03-1726- 2011 lebih besar 31,65% dibandingkan nilai normalisasi gaya geser SNI 03-1726- 1989, dan nilai normalisasi gaya geser SNI 03-1726-2011 lebih kecil 21,18% dibandingkan nilai normalisasi gaya geser SNI 03-1726-2002. Hasil yang diperoleh pada penelitian ini hanya berlaku untuk bangunan tingkat rendah dengan struktur beton bertulang yang berada di Jakarta dengan kondisi tanah lunak. ......Indonesia is one of the areas with high level of seismic risk. The reason is because Indonesia is located between four active tectonic plates, namely Eurasian plate, Indo-Australian plate, Philippine plate, and the Pacific plate. In 2011, the government of Indonesia formulated SNI 03-1726-2011, the new regulation of earthquake-resistant buildings planning to replace the previous regulation, SNI 03-1726-2002. The object of this research is low-level buildings in Jakarta. The stucture is modeled in 3 dimension by using ETABS ver. 9.5. The model is loaded by earthquake load which is obtained from the regulation of earthquake-resistand buildings. The seismic base shear and the story drift is then obtained by the analysis of ETABS. The results obtained are the average normalized shear force value of SNI 03-1726-2011 has the greater value of 31.65% compared to the average value of SNI 03-1726-1989 normalized shear force, and the average normalized shear force of SNI 03-1726-2011 is smaller by the value of 21.18% compared to the value of the normalized shear force of SNI 03-1726-2002. The results obtained in this study are only applicable to low-level buildings with reinforced concrete structure located in Jakarta with soft soil conditions.

Abstrak :
Penelitian ini membahas mengenai metode desain sistem ganda dari struktur portal - dinding geser beton bertulang akibat beban gempa dan kebutuhan tulangan yang diperlukan untuk masing-masing metode perhitungan. Dalam penentuan sistem ganda sesuai peraturan SNI 03-1726-2002, pada penelitian ini dilakukan tiga metode desain, struktur portal - dinding geser yang berinteraksi, struktur portal dengan boundary element dinding geser, dan struktur portal dengan dengan dinding geser yang di non-aktifkan. Dalam metode portal - dinding geser yang berinteraksi, struktur bangunan di desain berdasarkan analisis dinamik dan analisis statik, tetapi untuk dua metode lainnya dilakukan dengan analisis statik. Pada penelitian ini ditinjau bangunan 8 lantai pada lokasi gempa di Jakarta dengan tanah lunak dianalisis sebagai sistem ganda. Simulasi numerik menunjukkan bahwa pendekatan portal ? dinding geser saling berinteraksi dengan faktor reduksi R = 6,5 (SRPMM) menghasilkan tulangan paling besar dibandingkan dengan dua metode lainnya. ......This thesis discussed about method of design of a reinforced concrete shear wall - frame structure as dual system due to earthquake load and the requirement of rebar for each methods. In determining dual system structure based on SNI 03-1726-2002, some methods of design such as interaction of shear wall - frame structure, frame with boundary element, and frame with deactivated shear wall is considered in this thesis. In interaction of shear wall - frame structure method, building structure was designed based on dynamic and static analysis, however for two other methods static approach was employed. In this thesis an 8-story building located in Jakarta and built on soft soil was analyzed as dual system. Numerical simulations show that interaction of shear wall ? frame structure approach with reduction factor R = 6,5 (IMRF) results the biggest required rebar compared with other methods.