scholarly journals Analisis Story Drift dan Kondisi Sendi Plastis Berbasis Performa pada Gedung Bertingkat dengan Konfigurasi Struktur Persegi Panjang, U, L, H, dan T

2019 ◽  
Vol 25 (1) ◽  
pp. 38
Author(s):  
Aji Rahmantyo ◽  
Relly Andayani
Keyword(s):  
Linear Time ◽  
Time History ◽  
Performance Based Design ◽  
Finite Model ◽  
Seismic Behaviour ◽  
Linear Elastic ◽  
Strength Based ◽  
Concrete Building ◽  
Story Drift ◽  
Couple Beam

Strength based design is commonly used in the design of resisting earthquake building. It is analyzed by linear elastic method so that it can’t describe the seismic behaviour of the structures. For that reason, the design of structure needs to consider performance based design. Irregularity of structure play important role for the results of Structure Performance. This paper uses five models of 20 storey reinforced concrete building with same height(76 m) and areas(750m2) with different plan configurations: rectangular, T, L, U, and H-shaped. Non linear time history method is used  to investigate the seismic behaviour of the structures, using finite model with ETABS2016. Dimension of structures are column (600 x1000 mm), shear wall (400mm), couple-beam (400x900 mm), slab (140mm). Recorded accelorogram used in this paper are Altadena, Array, Corralit, LACC, and Yermo because it has almost same earthquake mechanism, magnitude, and epicentrum distance, so that they are used as an artificial accelorogram that is synthesized using Wavelet Function according to SNI 1726-2012.Result shows that the story drift and plastic hinges for collapse prevention (CP) are: rectangular (story drift is 0.59% and amount of CP hinges are 8), H-shaped (1.58%/23), L-shaped (2.41%/30), U-shaped (4.59%/35), T-shaped (5.8%/58).

scholarly journals Evaluasi Geser Dasar Minimun pada SNI 1726-2012

2019 ◽  
Vol 10 (2) ◽  
pp. 166-184
Author(s):  
Johnny Setiawan ◽  
Iswandi Imran
Keyword(s):  
Linear Time ◽  
Damage Control ◽  
Time History ◽  
Time History Analysis ◽  
Performance Level ◽  
Life Safety ◽  
Base Shear ◽  
History Analysis ◽  
Story Drift ◽  
Immediate Occupancy

Terdapat cukup banyak perubahan pada SNI 1726-2012, salah satunya adalah adanya persyaratanbatas geser dasar minimum (minimum base shear) yang tidak ada pada peraturan sebelumnya.Metode yang akan dilakukan adalah bangunan gedung dengan klasifikasi ketinggian rendah,sedang dan tinggi akan dianalisis dengan menerapkan geser dasar minimum dan tanpa geser dasarminimum. Analisis yang akan digunakan adalah analisis ragam spektrum respons (ResponsSpectrum Analysis, RSA), analisis respons riwayat waktu (Time History Analysis, THA) dananalisis respons riwayat waktu non linier (Non Linear Time History Analysis, NLTHA). Hasilanalisis menunjukkan bahwa pada peraturan SNI 1726-2012 dengan adanya persyaratan batasangeser dasar minimum dapat menjamin kinerja struktur sesuai dengan yang diharapkan.Kekhawatiran adanya batasan geser dasar minimum pada SNI 1726-2012 akan membuat desainmenjadi tidak ekonomis, ternyata tidak terbukti karena tidak memberikan pengaruh signifikanpada hasil desain, khususnya untuk bangunan dengan kategori ketinggian rendah dan sedang.Untuk bangunan dengan klasifikasi bangunan tinggi, analisis dan desain dengan memperhitungansyarat batasan geser dasar minimum dan tanpa memperhitungkan geser dasar minimum dapatmemberikan hasil desain yang baik, tetapi pengecekan pada Level Kinerja (Performance Level)sesuai dengan story drift menunjukkan bahwa analisis dengan memperhitungkan syarat geser dasarminimum memberikan hasil dengan level kinerja yang cukup baik yaitu Immediate Occupancy(IO) hingga Damage Control (DO), sedangkan tanpa memperhitungkan geser dasar minimummemberikan hasil dengan level kinerja yang kurang baik yaitu Life Safety (LS) hingga StructuralStability (SS). Sedangkan pada level kinerja elemen struktur, analisis tanpa memperhitungkangeser dasar minimum menyebabkan banyak elemen struktur yang berada pada level kinerjaCollapse Prevention (CP).

scholarly journals Dynamic Response of Tall Building with Base Isolation Subjected to Earthquake Forces

2019 ◽  
Vol 9 (2) ◽  
pp. 4157-4166
Keyword(s):  
Base Isolation ◽  
Linear Time ◽  
Time History ◽  
Tall Buildings ◽  
Ground Vibration ◽  
Tall Building ◽  
Structural Vibration ◽  
Control Technique ◽  
Base Shear ◽  
Seismic Behaviour

In the fast-paced contemporary world, new inventions with rapid construction techniques came across usually built to resist the lateral forces. Among them, the demand for tall buildings has put a revolutionary impact on society. In this study, base isolation as an earthquake resisting design technique was utilized which substantially dissociate a superstructure from its substructure and increase flexibility resisting on the ground vibration areas by providing the different types of base isolators. Lead rubber bearing (LRB) isolator is a passive structural vibration control technique. In this research study, seismic behaviour of tube in tube system steel tall building in square, circular, hexagonal, and octagonal plan configurations with varying frame sections with and without LRB base isolation was analyzed for the comparative analysis on the basis of base shear, overturning moment, time period, storey displacement, storey drift and storey acceleration according to IS 1893 (part 1):2016 and UBC 1997 Earthquake code in E-TABS software by non-linear time history analysis. From the results, Octagonal shape was found to be the best option for tall buildings whereas the hexagonal shaped building showed poor performance during an earthquake.

scholarly journals Intensity Measure Based on a Smooth Inelastic Peak Period for a More Effective Incremental Dynamic Analysis

2020 ◽  
Vol 10 (23) ◽  
pp. 8632
Author(s):  
Juan Carlos Vielma ◽  
Maria Cristina Porcu ◽  
Nelson López
Keyword(s):  
Dynamic Analysis ◽  
Fourier Spectrum ◽  
Linear Time ◽  
Time History ◽  
Incremental Dynamic Analysis ◽  
Seismic Intensity ◽  
Intensity Measure ◽  
Peak Period ◽  
History Analysis ◽  
Concrete Building

The Incremental Dynamic Analysis (IDA) assesses the global collapse capacity of a structure by plotting its maximum inelastic response, obtained through a non-linear time-history analysis, versus the scaled intensity of different input earthquakes. The seismic intensity is often measured through the spectral acceleration at the fundamental elastic period. However, this can produce highly variable results. An alternative method is presented in this paper that relies on the elongated period, calculated either from the Fourier spectrum of the acceleration at a target building point (inelastic peak period) or from a smooth Fourier spectrum (inelastic smooth peak period). By referring to a reference reinforced concrete building and to a set of 10 spectrum-consistent earthquakes, the paper presents the results of a wide investigation. First, the variation in the elongated period as a function of the seismic intensity is discussed. Then, the effectiveness of the proposed method is assessed by comparing the IDA curves to those obtained through the elastic period or through approximate values of the elongated period given in the literature. The results show that the alternative IDA procedure generates curves with less-dispersed collapse thresholds. A statistical analysis shows significant improvements in the results when the inelastic smooth peak period is adopted.

scholarly journals Response of Tall Structures Along Face Exposed to Blast Load Applied at Varying Distance

2020 ◽  
Vol 9 (1) ◽  
pp. 455-460 ◽  
Keyword(s):  
Linear Time ◽  
Time History ◽  
Cost Effective ◽  
Blast Load ◽  
Blast Loads ◽  
Building Models ◽  
Tall Structures ◽  
History Analysis ◽  
Story Drift ◽  
The Face

Blast loads caused by explosives are unexpected loads. These loads cause huge damage to the structure and decrease the strength and durability of structure, especially for elevated buildings. Therefore study of such loads is of major importance. In the present study, G+10 floors with second, third and end bays is modelled using ETABS and sudden impact dynamic load analysis is carried out. The analysis is carried out on the face directly exposed to the blast load for 7 building models. The blast loads are obtained with the help of TM5-1300 manual as well as ATBLAST software and Structure is designed in ETABS software by non-linear time history analysis. The results of this study help in understanding the behaviour of tall structures in terms of drift, displacement, joint acceleration and shear. Observations show that Model 7 is found to have extreme shear, storey displacement and inter-story drift. The research on examination of tall structures subjected to explosion is helpful in coming up with a better, cost-effective design for blast resistant structures.

scholarly journals Comparison of analysis techniques for the seismic evaluation of an 88-storey concrete building

2021 ◽  
Author(s):  
Andrew Shaffu
Keyword(s):  
Linear Time ◽  
Time History ◽  
Seismic Zone ◽  
Seismic Evaluation ◽  
Coupling Beams ◽  
Orthogonal Direction ◽  
History Analysis ◽  
Nonlinear Time History Analyses ◽  
Concrete Building ◽  
Nonlinear Time History

This thesis presents the comparison of results for an 88-storey reinforced concrete building subjected to static and dynamic analyses. Similar to a building designed in a moderate seismic zone, the structure is designed and detailed according to the ACI 318M (2002) Code provisions and the seismic provisions of the UBC (1997). The building is modeled according to structural drawings and element design specifications are used in describing members' deformation characteristics. Resistance to dynamic motion is provided through boxed core-wall assemblies acting as cantilevers walls in one direction and linked with coupling beams at storey levels in the orthogonal direction. The equivalent static, dynamic modal spectrum, linear time-history and nonlinear time-history analyses are employed and a comparison of maximum inter-storey drift response is provided. The results of the analyses show that the linear time-history analysis is the most appropriate method in capturing the behavior of this particular building under dynamic loading.

scholarly journals A Multi-Scale Analysis Based on a Map-Oriented Database for the Out-of-Plane Seismic Behaviour of Masonry Structures

2021 ◽  
Author(s):  
Chenjie Yu ◽  
Sander Meijers
Keyword(s):  
Kinematic Analysis ◽  
Linear Time ◽  
Time History ◽  
Unreinforced Masonry ◽  
Masonry Structures ◽  
Seismic Behaviour ◽  
Accurate Analysis ◽  
Multi Scale ◽  
Non Linear ◽  
Out Of Plane

Abstract Since 1986, earthquakes have occurred in East Groningen , but most houses, schools and are made of unreinforced masonry, which must now withstand magnitude 4 earthquakes. This has created an urgent need to assess large amounts of buildings in a fast but reliable manner. The out-of-plane behaviour is important for seismic assessments of unreinforced masonry buildings. Although the most accurate analysis method to determine the out-of-plane response of such walls is non-linear time-history analysis ( NLTH ), non-linear kinematic analysis ( NLKA ) provides a simple, fast but still reliable solution due to the computational difficulties of NLTH for structures constructed of unreinforced masonry. In this paper, the out-of-plane behaviours of masonry structures are up-scaled from a component scale to a provincial scale in a multi-scale manner. A map-oriented database is established to describe both local behaviours of walls and global behaviours of a province. The out-of-plane assessment by non-linear kinematic analysis ( NLKA ) is automated via the database without further calculations after the static analysis. The database provides a solid guidance to determine which detailed assessment methods will be adopted with limited data before a FEM model is built

Study on the Performance-Based Aseismic Design for RC Frame with Mild Steel Shear Damper

2014 ◽  
Vol 1065-1069 ◽  
pp. 1513-1517
Author(s):  
Zhen Huang ◽  
Rui Qiu Li ◽  
Lin Zhi Yang
Keyword(s):  
Mild Steel ◽  
Design Method ◽  
Time History ◽  
Performance Based Design ◽  
Rc Frame ◽  
Aseismic Design ◽  
History Analysis ◽  
Story Drift ◽  
Energy Dissipation Capacity ◽  
Rare Earthquake

The performance-based design of structure can reach the performance objectives under different earthquakes. Mild steel shear dampers (MSSDs) have a good and stable energy dissipation capacity, and are widely used in seismic reduction structure. This paper presents a performance-based aseismic design method for RC frame with mild steel shear dampers, the numerical model of frame was established by SAP2000, then seismic performance of the frame was studied by time history analysis. Compared with pure frame, the inter-story drift ratio of MSSD frame is significantly decreased under frequent, moderate and rare earthquake respectively, and the performance objectives are satisfied, demonstrating the effectiveness of the performance-based aseismic design method.

scholarly journals Comparison of analysis techniques for the seismic evaluation of an 88-storey concrete building

2021 ◽  
Author(s):  
Andrew Shaffu
Keyword(s):  
Linear Time ◽  
Time History ◽  
Seismic Zone ◽  
Seismic Evaluation ◽  
Coupling Beams ◽  
Orthogonal Direction ◽  
History Analysis ◽  
Nonlinear Time History Analyses ◽  
Concrete Building ◽  
Nonlinear Time History

This thesis presents the comparison of results for an 88-storey reinforced concrete building subjected to static and dynamic analyses. Similar to a building designed in a moderate seismic zone, the structure is designed and detailed according to the ACI 318M (2002) Code provisions and the seismic provisions of the UBC (1997). The building is modeled according to structural drawings and element design specifications are used in describing members' deformation characteristics. Resistance to dynamic motion is provided through boxed core-wall assemblies acting as cantilevers walls in one direction and linked with coupling beams at storey levels in the orthogonal direction. The equivalent static, dynamic modal spectrum, linear time-history and nonlinear time-history analyses are employed and a comparison of maximum inter-storey drift response is provided. The results of the analyses show that the linear time-history analysis is the most appropriate method in capturing the behavior of this particular building under dynamic loading.

Non-Linear Time History Analysis for the Performance Based Design of Shanghai Tower

2011 ◽  
Author(s):  
Dennis C. K. Poon ◽  
Ling-En Hsiao ◽  
Yi Zhu ◽  
Leonard Joseph ◽  
Steve Zuo ◽  
...  
Keyword(s):  
Linear Time ◽  
Time History ◽  
Time History Analysis ◽  
Performance Based Design ◽  
History Analysis ◽  
Non Linear

scholarly journals Performance Evaluation and Pounding Effects between KPFT Building Alternative Design for SGLC Building

2019 ◽  
Vol 5 (1) ◽  
pp. 17
Author(s):  
Rusgiyanto Rusgiyanto
Keyword(s):  
Linear Time ◽  
Numerical Study ◽  
Time History ◽  
Performance Level ◽  
Learning Center ◽  
Earthquake Loads ◽  
History Analysis ◽  
Adjacent Building ◽  
Story Drift

Main Office building of the Faculty of Engineering (KPFT) is one of the buildings located within the complex of the Faculty of Engineering, Universitas Gadjah Mada. There is a plan to build a new building adjacent to the KPFT building. The design can interact simultaneously in support of earthquake so that the pounding effect can occur. The pounding effect due to earthquake loads is to improve the quality of KPFT building. This study applies numerical study to determine the effect of adding new structures around the old structure. This research uses 3 structure models, i.e. KPFT building without a wall (SKTD), the new Smart and Green Learning Center (SGLC) structure (SB), and the composite building (SG). This research uses linear time history analysis. There are 3 earthquake records including Superstition Hills-02, Darfield New Zealand, and El Mayor-Cucapah. The results shows story drift from the KPFT building (SKTD model) is reduced after the adjacent building has occurred. The performance level for SKTD models is Life Safety (LS), whereas the performance level for KPFT building after combining with the new structure is Operational (OP). The KPFT building after combining with new structure has a better performance level due to its drift ratio.

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