scholarly journals EVALUASI JARAK AMAN ANTARA STRUKTUR SRPM TINGGI DENGAN STRUKTUR SRPM DISEBELAHNYA TERHADAP GEMPA

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Ade Faisal ◽  
Tondi Amirsyah Putera ◽  
Mariden Purba
Keyword(s):  
Time History ◽  
Tall Buildings ◽  
Soil Conditions ◽  
Safe Distance ◽  
High Rise ◽  
Moment Resisting Frame ◽  
History Analysis ◽  
Moment Resisting ◽  
Dynamic Time ◽  
Storey Building

Pembangunan gedung-gedung tinggi menjadi salah satu alternatif yang di pilih karena keterbatasan dan mahalnya lahan diperkotaan sementara tingkat permintaan ruang untuk berbagai kegiatan semakin tinggi. Hal ini menyebabkan gedung-gedung bertingkat sering dibangun saling berdekatan satu dengan yang lainnya. Benturan dapat terjadi pada dua bangunan gedung bertingkat yang bersebelahan apabila jarak antara dua bangunan lebih kecil dari simpangan maksimum yang terjadi akibat beban gempa. Studi ini bertujuan untuk mencari jarak aman antara dua bangunan tinggi yang bersebelahan. Gedung yang direncanakan 2 model menggunakan SRPM dengan material beton bertulang yang terletak di kota Medan dengan kondisi tanah sedang. Model  pertama (Model 1) direncanakan memiliki tinggi 28,5 meter terdiri dari 8 lantai, sedangkan Model kedua (Model 2) direncanakan memiliki tinggi 35,5 meter terdiri dari 10 lantai. Analisa yang digunakan pada studi ini yaitu analisis dinamik riwayat waktu. Nilai simpangan yang terjadi pada gedung  8 lantai (Model 1) untuk arah x sebesar 80,87 mm dan untuk arah y sebesar 79,35 mm. Simpangan yang  terjadi pada gedung 10 lantai (Model 2) untuk arah x sebesar 113,33 mm dan untuk arah y sebesar 112,39 mm. Hasil analisa yang dilakukan menunjukkan jarak aman antara gedung 8 lantai dengan gedung 10 lantai adalah sebesar 2,1 meter, sedangkan jarak aman antara gedung 10 lantai dengan gedung 10 lantai adalah sebesar 2,2 meter.  Kata Kunci : Analisis Riwayat Waktu, Benturan Antar Gedung, Jarak Antar Gedung, Simpangan  ABSTRACT The construction of tall buildings became one of alternative that was chosen because of the urban land limitations and the cost. At the same time the space demand for various urban activities is increased. It is caused the high-rise buildings are often built very close to one another. The collision can be occurred if two adjacent building if the distance between the two building is smaller than the maximum drift caused by the earthquake action. This study aims to plan a safe distance between two adjacent high-rise buildings. The planned building two models using Moment Resisting Frame with reinforced concrete material that is located in the city Medan with moderate soil conditions. The first model (Model 1) has a height of 28.5 meters is planned consists of 8 floors, while the second model (Model 2) planned to have a height of 35.5 meters consists of 10 floors. The analysis used in this study is the analysis of dynamic time history. The displacement value which occurred on 8 storey building (Model 1) to the x direction by 80.87 mm and for the y direction by 79.35 mm. The displacement occurs in the building 10 floors (Model 2) to the x direction of 113.33 mm and for the y direction of 112.39 mm. The results of analysis indicate that the safe distance between 8 storey building with 10 floors of the building is 2.1 meters, while the safe distance between buildings 10 floors with 10 storey building is 2.2 meters. Keywords: Time History Analysis, Clash Between Buildings, Distance Between Buildings, Deviation

scholarly journals Comparison of Scaling Ground Motions Using Arithmetic with Logarithm Values for Spectral Matching Procedure

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Rui Zhang ◽  
Dong-sheng Wang ◽  
Xiao-yu Chen ◽  
Hong-nan Li
Keyword(s):  
Ground Motions ◽  
Time History ◽  
Response Spectra ◽  
Time History Analysis ◽  
Spectral Matching ◽  
Moment Resisting Frame ◽  
History Analysis ◽  
Moment Resisting ◽  
Structural Responses ◽  
Structural Time

In recent studies, spectral matching is the most commonly proposed method for selecting earthquake records for time-history analysis of structures. However, until now, there have been no serious investigations of the effects of coordinate values on the scaling of ground motions. This paper investigated the influence of using arithmetic and logarithmic values of response spectra in spectral matching procedures (i.e., ASM and LSM methods) on the results of nonlinear structural time-history analysis. Steel moment resisting frame structures of the 3-, 9-, and 20-stories, which represent low-, medium-, and high-rise buildings, respectively, were used as examples. Structural benchmark responses were determined by calculating the arithmetic mean and median of peak interstory drift ratio (PIDR) demands based on the three record sets developed by the American SAC Steel Project. The three record sets represent seismic hazard levels with 50%, 10%, and 2% probabilities exceeded in 50 years, and their average acceleration spectra were also taken as the target spectrum. Moreover, another 40 record components for selection were scaled both by ASM and LSM methods. The seven components whose spectra were best compatible with the target spectra were selected for the structural time-history analysis. The scale factors obtained by the LSM method are nearly larger than that of the ASM method, and their ranking and selection of records are different. The estimation accuracies of structural mean (median) responses by both methods can be controlled within an engineering acceptable range (±20%), but the LSM method may cause larger structural responses than the ASM method. The LSM method has a better capacity for reducing the variability of structural responses than the ASM method, and this advantage is more significant for longer-period structures (e.g., 20-story structure) with more severe nonlinear responses.

Evaluation of N-M Model on Simulating Seismic Response of High-Rise SRC Structure

2013 ◽  
Vol 477-478 ◽  
pp. 1060-1063
Author(s):  
Guo Bin Bu ◽  
Jian Cai ◽  
Kang Ning Li
Keyword(s):  
Interaction Model ◽  
Time History ◽  
Bending Moment ◽  
Dynamic Responses ◽  
Biaxial Bending ◽  
Fiber Model ◽  
High Rise ◽  
History Analysis ◽  
Moment Interaction ◽  
Dynamic Time

The axial load-biaxial bending moment interaction model (N-M model) is developed based on the metal plasticity theory, and its reliability in structural analysis is evaluated. Employing CANNY program, linear and nonlinear dynamic time history analysis is conducted to a 32-story SRC structure. The dynamic responses are compared between N-M model and fiber model cases. The results show that N-M model can simulate well the dynamic response of the high-rise hybrid structures. Besides, N-M model has clear mechanical concept and is much simpler compared to fiber model, and the computational efficiency can be greatly improved by using N-M model.

scholarly journals Seismic Design and Performances of Frame Structures Connected to a Strongback System and Equipped with Different Configurations of Supplemental Viscous Dampers

2021 ◽  
Vol 7 ◽  
Author(s):  
Michele Palermo ◽  
Vittoria Laghi ◽  
Giada Gasparini ◽  
Stefano Silvestri ◽  
Tomaso Trombetti
Keyword(s):  
Time History ◽  
Elastic Field ◽  
Frame Structure ◽  
Viscous Dampers ◽  
Single Degree Of Freedom ◽  
Fluid Viscous Dampers ◽  
Moment Resisting Frame ◽  
Moment Resisting ◽  
Supplemental Dampers ◽  
Dynamic Time

The paper investigates the dynamic behavior of structural systems obtained by connecting a moment-resisting frame structure with a vertical rigid truss pinned at the base, known in literature as “strongback,” and equipped with added fluid-viscous dampers. The strongback, designed in order to remain in the elastic field under strong seismic ground motion, acts as a mast by imposing to the structure a linear lateral deformed shape. By regularizing the lateral drift profile of the structure, the strongback limits undesired effects such as weak-storey mechanisms, damage concentration and residual drifts. In addition, when supplemental dampers are inserted in the structure, a considerable amount of energy can be dissipated, thus reducing the peak seismic response. The aim of the work is twofold: i) to provide analytical formulations for the preliminary design of added dampers based on the Generalized Single Degree Of Freedom (GSDOF) concept, and ii) to evaluate the increase in energy dissipation capabilities for selected dampers configurations thanks to the presence of the strongback. The formulas are developed for different configurations of added viscous dampers: dampers inserted within the frame between all or selected consecutive storeys (inter-storey placement) and dampers located at the base of the strongback to realize a rigid “dissipative tower.” The effectiveness of the dampers configurations is evaluated through dynamic time-history analyses.

Analysis on Energy-Consumption and Earthquake-Mitigation for a High-Rise Building Set Metal Yield Dampers

2011 ◽  
Vol 90-93 ◽  
pp. 1517-1521
Author(s):  
Gui Xuan Wang ◽  
Yu Wang ◽  
Jie Zhao
Keyword(s):  
Time History ◽  
Residential Building ◽  
Response Analysis ◽  
Elastic Plastic ◽  
High Rise ◽  
History Analysis ◽  
Building Set ◽  
Metal Yield ◽  
Dynamic Time ◽  
Resistance Performance

Based on the mechanical properties of metal yield damper, high-rise residential building is implemented elastic-plastic response analysis for structure by using the nonlinear dynamic time-history analysis method under the effect of M8-class strong earthquake ,and judge performance level of structure and component. According to the elastic-plastic analysis results, put forward the improvement proposal for design to make the structure have the better resistance performance against the earthquake.

scholarly journals Efficiency of Shear Wall Location on Reinforced Concrete Buildingsin Ethiopia under Seismic Excitation

2019 ◽  
Vol 8 (4) ◽  
pp. 10624-10631
Keyword(s):  
Pushover Analysis ◽  
Time History ◽  
Shear Walls ◽  
Time History Analysis ◽  
Seismic Excitation ◽  
High Rise ◽  
Capacity Curves ◽  
History Analysis ◽  
Non Linear ◽  
Dynamic Time

Shear walls play a key role in the lateral-load resistance process in high-rise buildings, as well as resisting the lateral loads generated by seismic forces. This paper examines the effect of shear walls in rectangular, L, and U type and their locations in RC building under seismic excitation. Seismic impact is primarily concerned with structural protection, particularly during the earthquake and also with high-rise buildings, ensuring adequate lateral rigidity to withstand seismic loads is very critical. Rectangular, L and U shaped shear walls was analyzed and compared at various location using non-linear analysis. For analysis three models were considered with various above said shapes at different locations of high rise buildings in high seismic regions of Ethiopia. The structure's seismic capacity and demand were analyzed using non-linear pushover analysis based on displacement. Regular in plane and elevation building for this investigation G+7 was targeted to estimate the structure's seismic response and resistance capacity Non-linear dynamic time-history analysis was performed for comparison, by applying 30 artificially generated ground motion for all sample buildings. The capacity curves of the structures, as derived by pushover analysis were compared for buildings with rectangular, L and U shape shear walls using Seismo-Struct software. Also, the performance levels of structures are estimated and compared using Seismo-Struct software to perform nonlinear dynamic time-history analysis.

Response Law and Influencing Factors of the Soil under Action of Pile Driving Vibration Based on Midas/GTS

2013 ◽  
Vol 353-356 ◽  
pp. 979-983
Author(s):  
Dong Zhang ◽  
Jing Bo Su ◽  
Hui De Zhao ◽  
Hai Yan Wang
Keyword(s):  
Damping Ratio ◽  
Large Diameter ◽  
Time History ◽  
Pile Driving ◽  
Analysis Model ◽  
Vibration Load ◽  
History Analysis ◽  
Study Results ◽  
Propagation Law ◽  
Dynamic Time

Due to the upgrade and reconstruct of a high-piled wharf, the piling construction may cause the damage of the large diameter underground pipe of a power plant nearby. For this problem, a dynamic time-history analysis model was established using MIDAS/GTS program. Based on the analysis of the pile driving vibration and its propagation law, some parameters, such as the modulus of the soil, the Poissons ratio of soil, the action time of vibration load and the damping ratio of the soil that may have an effect on the response law of the soil, were studied. The study results not only serve as an important inference to the construction of this case, but also accumulate experience and data for other similar engineering practices.

scholarly journals The Effect of slit-friction hybrid damper on the Performance of Dual System

2019 ◽  
Vol 13 (1) ◽  
pp. 271-280
Author(s):  
Azadeh Khoshkroodi ◽  
Hossein Parvini Sani
Keyword(s):  
Time History ◽  
Steel Structures ◽  
Repair Cost ◽  
Friction Dampers ◽  
History Analysis ◽  
Different Types ◽  
Moment Resisting ◽  
Hybrid Damper ◽  
Large Earthquakes ◽  
Different Levels

Aims: The aim of the present paper is to evaluate the behavior of slit friction hybrid dampers (SFHD) on steel structures. Therefore, the behavior moment resisting steel frames of structures in original stats and structures equipped with hybrid damper with two different types of behavior was analyzed and evaluated. Background: The recent study evaluated the combined effect of shear-friction dampers and slit dampers with measurements of non-uniform strips in seismic protection for different levels of energy. The recent study was carried out a about hybrid dampers, consisting of friction and split dampers in response to small and large earthquakes. Previous results have shown the ability of inactive hybrid systems in improving the reaction of structures to traditional lateral-systems. Kim and Shin showed that structures consisted of hybrid dampers needed less repair cost and time. Methods: Pushover and time history were carried out on original structures and structures equipped with dampers, in 5 and 10 stories structures. Results: Analysis about the probability of collapse showed about 30% and 84%. Conclusion: According to the result, by adding the SFHD, increased stiffness by 17% in retrofitted structures such as drift and displacement of roof decreases by 27% and 20% in push over analysis, respectively. Also, displacement in time history analysis up to 55% reduces in average. Also, the results of the IDA show that adding the SFHD to structures significantly increases by 55% the spectral acceleration capacity in structures.

scholarly journals Numerical simulation and experimental validation of ductile tearing in A106 Gr. B piping system under simulated seismic loading conditions

2018 ◽  
Vol 233 (1) ◽  
pp. 28-38 ◽  
Author(s):  
Hyun-Suk Nam ◽  
Gyo-Geun Youn ◽  
Jong-Min Lee ◽  
Hune-Tae Kim ◽  
Yun-Jae Kim
Keyword(s):  
Loading Condition ◽  
Experimental Validation ◽  
Damage Model ◽  
Time History ◽  
Seismic Loading ◽  
Piping System ◽  
Fracture Toughness Test ◽  
Ductile Tearing ◽  
History Analysis ◽  
Dynamic Time

This work presents finite element ductile tearing simulation and experimental validation of a piping system with a circumferential surface cracked (SC) A106 Gr. B pipe under simulated seismic loading condition. The damage model for simulation is based on the multiaxial fracture strain energy. The parameters in the damage model are determined from tensile and fracture toughness test results under the monotonic loading condition. For the system dynamic time history analysis, the Rayleigh damping model is employed. For cyclic constitutive equations, two models were considered to confirm its sensitivity. Predicted crack initiation and ductile tearing agree well with the experimental results.

Sign in / Sign up

Export Citation Format

Share Document