scholarly journals Analysis of Multistory Buildings With Stub Column In Different Seismic Zones In India – A Review

2022 ◽  
pp. 44-49
Author(s):  
Somasundhara Naathan M ◽  
Dr Ramadevi K
Keyword(s):  
Seismic Analysis ◽  
Pushover Analysis ◽  
Seismic Load ◽  
Base Shear ◽  
Software Analysis ◽  
Multistory Buildings ◽  
Seismic Zones ◽  
Story Drift ◽  
Stub Column ◽  
Stub Columns

Construction of building requires proper planning and management. Buildings are subjected to various loads such as dead load, live load, wind load and seismic load. Seismic load has extreme adverse effect on building so it is necessary to perform seismic analysis. This paper explains about the response of building when it is subjected to seismic load, this response can be shown by story drift and base shear. Behavior of buildings with stub columns is analyzed and the results are compared with buildings without stub columns. Seismic analysis has been performed on (G+7) buildings located in seismic zones 2,3,4&5 using ETABS software. Analysis has been performed according to IS 1893:PartI (2002).The storey drift and design base shear are evaluated and compared. Pushover analysis was performed and the results were compared.

Investigation on Applicability of Pushover Analysis on High-Rise Diagonal Grid Structural System

2010 ◽  
Vol 163-167 ◽  
pp. 3918-3924
Author(s):  
Jun Teng ◽  
Hu Bing Tu ◽  
Huan Lin Mao ◽  
Ying Liang Qiu
Keyword(s):  
Seismic Analysis ◽  
Pushover Analysis ◽  
Incremental Dynamic Analysis ◽  
Analysis Method ◽  
Structural System ◽  
Base Shear ◽  
High Rise ◽  
Story Drift ◽  
Load Pattern ◽  
Global And Local

As an important seismic analysis method, Pushover is widely used in high-rise buildings, while there is still lack of investigation on applicability of Pushover analysis on diagonal grid structural system. Two structures with height 144 and 288 meters are respectively built, and then Pushover analysis and Incremental dynamic analysis are conducted. Results calculated by two different methods are compared, including top displacement vs. base shear curve, inter-story drift vs. inter-story shear curve, distribution of inter-story drift angle along the building height and plastic developing sequence of structural weak positions. Meanwhile, influence of three lateral load patterns (uniform pattern，inverted triangle pattern and SRSS pattern) on the results is investigated. Analysis results demonstrate that Pushover analysis can in some extent reflect seismic performance of structures and SRSS load pattern can better capture global and local information of structures compared with other two patterns.

Pushover Analysis of Base Isolated RC Frame Buildings With Masonry Infills

2019 ◽  
Vol 10 (2) ◽  
pp. 18-31
Author(s):  
Radhikesh Prasad Nanda ◽  
Subhrasmita Majumder
Keyword(s):  
Base Isolation ◽  
Plastic Hinge ◽  
Pushover Analysis ◽  
Base Shear ◽  
Infilled Frame ◽  
Masonry Infills ◽  
Time Period ◽  
Frame Buildings ◽  
Story Drift ◽  
Rc Frame Buildings

In the present article, the performance of base-isolated infilled frames is studied analytically. The seismic performances of four RC buildings, namely RC bare frame without isolator, RC bare frame with isolator, RC infilled frame without isolator, and RC infilled frame with isolator are analysed. The results show a decrease in base shear value and increase in time period due to base isolated buildings, while these parameters are reversely affected due to infills. The decrease in story drift for the base isolated buildings is in phase while considering infill. Also, it can be inferred that plastic hinge formation is greatly affected by the introduction of masonry infill. Hence, relying on base isolation without considering infills may underestimate the seismic performance.

scholarly journals Pembandingan Perancangan Bangunan Tahan Gempa Menggunakan SNI 1726:2012 Dan SNI 1726:2019

2021 ◽  
Vol 18 (1) ◽  
pp. 88-99
Author(s):  
Azis Wicaksana ◽  
Anis Rosyidah
Keyword(s):  
Shear Force ◽  
Seismic Analysis ◽  
Building Design ◽  
Response Analysis ◽  
Base Shear ◽  
Seismic Resistant ◽  
Story Drift ◽  
Moment Resisting ◽  
Special Moment Resisting Frame ◽  
Spectrum Response

Indonesia has a code for designing a seismic-resistant building, which has always improved year after year. Start from Peraturan Perencanaan Tahan Gempa Indonesia Untuk Gedung (PPTI-UG) 1983, SNI 1726:2002, SNI 1726:2012, and the latest one is SNI 1726:2019. SNI 1726:2019 experienced some renewal on designing a seismic-resistant building. This research aims to compare spectrum response design and the structural behavior between seismic-resistant building design using SNI 1726:2012 and SNI 1726:2019. The reviewed structure behaviors are base shear force (V), drift (δmax), and story drift (Δ). The study compares the detail of the structural components as well as using SNI 2847:2013 and SNI 2847:2019. The research uses a 10-story building modeling that serves as an apartment building and located in the city of Banda Aceh. Seismic analysis using a spectrum response analysis with Special Moment Resisting Frame (SMRF) structure. The result showed that the peak acceleration (Sa) for the class sites of Medium Land (SD) and Hard Land (SC) were 11% and 26%, respectively, while for Soft Land (SE), there was no increase. The shear force in SNI 1726: 2019 has increased by 19.75% for the X direction and 19.97% for the Y direction. The increase in the shear force is directly proportional to the increase in drift and story drift. In the beam detailing and beam-column connection, there were no significant changes. While in the column detailing, there are additional provisions that cause the transverse reinforcement to be tighter.

Evaluating the effects of different slab types on static and dynamic characteristics of structures

2021 ◽  
Vol 7 (2) ◽  
pp. 71
Author(s):  
Yılmaz Keleş ◽  
Hüseyin Kasap ◽  
Zeynep Yaman
Keyword(s):  
Dynamic Characteristics ◽  
Seismic Analysis ◽  
Seismic Load ◽  
Hollow Core ◽  
Base Shear ◽  
Finite Element Software ◽  
Local Soil ◽  
Different Types ◽  
Hollow Core Slab ◽  
Waffle Slab

In this study, the effect of different types of slabs on dynamic characteristics of structures under the lateral loading was investigated. For this purpose, four different types of slabs namely, beamed slab, flat slab, one way ribbed (hollow core) slab and waffle slab have been modeled in buildings having 3, 4 and 5 storeys with the same geometric dimensions, in accordance to design and construction requirements (TS 500) and Turkish building seismic codes (TBDY, 2018). Seismic analysis calculations of the modeled buildings were done using the equivalent seismic load method. The assumed local soil class was taken from the geotechnical report as ZD. As a result of the analysis, natural periods, base shear forces, maximum horizontal displacements and relative storey drifts of the buildings were compared. Seismic analysis and calculations of the buildings were completed using SAP2000 finite element software.

Seismic Analysis of Continuous Rigid Frame Bridge with Energy-Based Modal Pushover Method

2010 ◽  
Vol 163-167 ◽  
pp. 3939-3942
Author(s):  
Zhong Quan Zou ◽  
Li Ping Zhou ◽  
Guo Jing He
Keyword(s):  
Seismic Analysis ◽  
Pushover Analysis ◽  
Displacement Curve ◽  
Seismic Zone ◽  
Base Shear ◽  
Continuous Rigid Frame Bridge ◽  
Capacity Spectrum ◽  
Rigid Frame ◽  
Rigid Frame Bridge ◽  
Modal Pushover

Energy-based modal pushover analysis method has been proved to be an appropriate approach to perform seismic analysis for structures whose high mode effect is not negligible. It directly establishes the capacity spectrum based on energy increments, which corrects the deficiency of conventional modal pushover method that the capacity curve would not be unique or even be retorted while the base shear-top displacement curve is established with respect to different reference nodes of the structure. In this paper, a continuous rigid frame bridge with tall piers in seismic zone is analyzed with EMPA method. The results showed that EMPA is more adaptable than conventional methods, and the seismic performance of the bridge can satisfy the demand of the design code.

scholarly journals Performance-Based Seismic Design for buildings

2020 ◽  
Vol 16 (2) ◽  
pp. 161-166
Author(s):  
Mathieu Gil-oulbé ◽  
Fouad Adnan Noman Abdullah Al-Shaibani ◽  
Abass Saad Lina
Keyword(s):  
Seismic Design ◽  
Pushover Analysis ◽  
Earthquake Hazard ◽  
Seismic Load ◽  
Limit States ◽  
Performance Levels ◽  
Load Carrying ◽  
Story Drift ◽  
Performance Based Seismic Design ◽  
Immediate Occupancy

Structures are designed using current seismic design codes which are mostly based on Force-Based Design approach. The aim of the work is to implement the Performance-Based Seismic Design (PBSD) approach in concrete buildings. PBSD, which is a new concept in seismic design of structures, is a reliable approach capable of providing more detailed information on the performance levels of both structural and non-structural elements. Methods. In this study Performance-Based Seismic Design has been utilized on reinforced concrete irregular frame. In order to do this pushover analysis was done. Story drift ratios were chosen as deformation limits to define the performance levels for specific earthquake hazard levels. The results of this study show that Performance-Based Seismic Design gives a structure with better seismic load carrying capacity, thereby achieving the objective of performance as well as economy. It is also possible to conclude that PBSD obtained by above procedure satisfies the acceptance criteria for immediate occupancy and life safety limit states for various intensities of earthquakes.

scholarly journals Performance Behavior of Eccentrically Braced Steel Frame under Seismic Loading

2019 ◽  
Vol 8 (9S) ◽  
pp. 1077-1090
Keyword(s):  
Seismic Event ◽  
Pushover Analysis ◽  
Lateral Force ◽  
Steel Frame ◽  
Braced Frames ◽  
Base Shear ◽  
Eccentrically Braced Frames ◽  
Load Effect ◽  
Story Drift ◽  
Bracing System

Recent past growth of multi-story buildings structures with emphasis on steel has been found satisfactory. For solving the better-quality accommodation in the region where the chances of earthquakes are likely, role of bracing system enhances the performance of building under lateral load effect of earthquakes. Various methods of bracing systems are available in practices however, eccentrically braced frames (EBFs) are fairly new lateral force resisting system established to resist seismic event in a probable manner. Properly designed and detailed EBFs perform in a ductile manner through shear or flexural yielding of link element. The ductile yielding indicates wide hysteresis loop, which is excellent energy dissipation essential for high seismic event. The seismic performance of multi-story steel frame is designed according to the Indian code (IS800:2007). A simple computer-based pushover analysis is a procedure for performance-based design of buildings subjected to earthquake loading. Pushover analysis gets much importance in the past due to its ease and efficiency of the results. In this study eight frames were taken,among these, six frames which were braced as V, Inverted V, and Diagonal and remaining two are frames without bracing in two alternate heights (4 and 8 story). Seismic response of frames is studied using non-linear static analysis (pushover analysis) in terms of base shear, roof displacement, spectral displacement, spectral acceleration and story drift.

Seismic Analysis of Retrofitting of RC Regular Frame with V-Braced Frame

2021 ◽  
Vol 2 (1) ◽  
pp. 55-63
Author(s):  
Birendra Kumar Bohara ◽  
Kafeel Hussain Ganaie ◽  
Prasenjit Saha
Keyword(s):  
Failure Mechanism ◽  
Seismic Analysis ◽  
Response Spectrum ◽  
Base Shear ◽  
Dual Systems ◽  
Capacity Curves ◽  
Rc Frames ◽  
Strength Capacity ◽  
Story Drift ◽  
Seismic Behaviors

Retrofitting of the existing buildings helps to reduce the serious damages under the strong ground motions. In retrofitting techniques, steel bracings are used to resist the lateral load effectively. In this study, the author aimed to investigate the four-story RC frames without and with steel bracings to understand the seismic performances of the buildings. The authors select the V bracings having 7 different thickness of steel bracings ( t= 2.5, 4, 6, 8, 10, 14 and 20mm) and observed the effect in seismic behaviors of the structures in terms of maximum story displacements, inter-story drift (ISD), base shear, fundamental time period (FTP) and capacity curves. In addition, it observed the failure behaviors of the structures. To study the seismic behaviors, the response spectrum analysis and nonlinear static analysis are performed in ETABs software. The result indicates that V bracing improves the seismic performances of the RC frames as well as improves the strength capacity and stiffness of the buildings. Adding bracing in RC frames decreases the top story displacements and inter story drift of the buildings. To get the expected failure mechanism in the braced frames and suitable uniform energy dissipation behaviors, the bracings are designed in such a way that the RC columns should be the main line of defense in the dual systems. Expected failure mechanism is obtained when stronger column, weak beam and weaker bracings design philosophy is used and it is only possible when the columns are designed to resist at least 50% lateral base shear in dual systems. A suitable thickness of bracings which is economical and structurally good should be selected.

The Discussion on Lateral Load Distribution Mode while Structural Seismic Analysis is Proceeding

2011 ◽  
Vol 94-96 ◽  
pp. 1044-1048
Author(s):  
Jin Liang Han ◽  
Yun Xia Li ◽  
Zong Yun Mo
Keyword(s):  
Cross Section ◽  
Load Distribution ◽  
Seismic Analysis ◽  
Pushover Analysis ◽  
Lateral Force ◽  
Calculation Model ◽  
Seismic Load ◽  
Ansys Software ◽  
Distribution Mode ◽  
Lateral Load Distribution

In this study, the procedure of Pushover analysis has been put into effect, and following factors have been mainly researched in Pushover analysis: choosing the calculation model of structure and element; analyzing the yielding moment and limiting moment of cross section; posing the distribution pattern of lateral force; discussing the influence of high class mode of vibration on the structure. The following conclusions are given by analyzing a frame damaged by the seismic load with the help of the ANSYS software.

scholarly journals Seismic Analysis of Rcc Structure with Different Types of Dampers

2020 ◽  
Vol 9 (12) ◽  
pp. 205-210
Keyword(s):  
High Speed ◽  
Seismic Analysis ◽  
Structural Instability ◽  
Seismic Load ◽  
Friction Damper ◽  
Base Shear ◽  
Rapid Urbanization ◽  
High Rise ◽  
Mechanical Devices ◽  
Storey Building

In the present Era escalation of multi-storey high rise building is very common because of rapid urbanization in the entire world also innovation in the field of Engineering, science and Technology. Also Engineers have sophisticated designing software. As height of the building increases building response to the wind and seismic load increases. It means that forces and displacement of the structure is directly proportional to the height of the structure. Many research studiesare going on to reduce the structural instability due to high speed winds and earthquakes. During the earthquake the multi-storey high rise structures are failed to resist the seismic loads and it become the catastrophic disaster for human life’s and for the country. It is most important that structure should be able to withstand against external excitation forces. This can be achieved by building structure more flexible.During the time of earthquake multistorey structures are swing and large deformation is occurred and vibrations are transferred in the structure through the ground which causes instability in structure. Thus the use of damper is resists lateral forces (wind load, earthquake load) and providing stability to the structure. Dampers are the mechanical devices which dissipate energy which is facilitate in multi-storey structure to reduce the displacement, buckling of beams and columns and increases the structural stiffness. There is lot of various types of dampers are used in RC multi-storey building. This study deals with performance and selection of suitable type of damper which will be more resistant to earthquake for the selected multi-storey building and different seismic parameters like time period, story stiffness, story displacement, story drift and base shear are checked out. In this study seismic behavior of multi-story RCC building with various types of dampers like fluid viscous damper, friction damper and tuned mass damper is carried out.

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