Seismic Analysis of Irregular Building Frames with Soil Structure Interaction
by Sumit S. Chaudhari | Prof. M. R. Nikhar | Prof. V. A. Kalmegh "Seismic Analysis of Irregular Building Frames with Soil Structure Interaction"
Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021,
URL: https://www.ijtsrd.compapers/ijtsrd42505.pdf
Paper URL: https://www.ijtsrd.comengineering/structural-engineering/42505/seismic-analysis-of-irregular-building-frames-with-soil-structure-interaction/sumit-s-chaudhari
Seismic response of structure is extremely complex because of the non linear behavior soil during earthquakes. Seismic design of structures is generally carried out assuming fixed base ignoring the flexibility of soil. The main objective of the study is to investigate the significance of effect of soil structure interaction on building with mass irregularity. The dynamic contact approach was utilized to simulate pounding between the adjacent buildings. Nonlinear finite element analysis was performed for two adjacent multi story structures with four different configuration representing cases that can exist in reality. The seismic response of the studied cases generally emphasized that ignoring the soil flexibility and or the contribution of the infill panels may significantly alter the response of adjacent structures. Response spectrum analysis has been carried out and the parameters like time period, base shear, roof top displacement and storey drift of the building frames resting over foundation and soil media has been studied.
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Paper URL : https://www.ijtsrd.com/engineering/structural-engineering/38125/seismic-analysis-of-irregular-building-frames-with-soil-structure-interaction/sumit-s-chaudhari
Seismic response of structure is extremely complex because of non linear behaviour soil during earth quakes. Seismic design of structure is generally carried out assuming fixed based ignoring the flexibility of soil. The purpose of the study is to describe and investigate different approaches of considering soil flexibility in the soil structure interaction SSI with regard to response in the super structure. In the present work, to illustrate the effect of soil – stricture interaction on the seismic response of frame structure, irregular frame 15 storey having consider with based supported as fixed with an without considering the soil structure interaction. Building are model in SAP 2000. Three type of soil i.e. hard, medium hard, soft soil are used to in SSI – study. the soil is model as spring model or elastic continuum FEM , and stiffness is calculated by using the gerorge gazettes equation. The effect of SSI on various structural parameter i.e. natural time period, based shear, roof displacement, are studed and discuss. The main objective in using this earthquake was, to find out of the structure when heat by long duration and see the how the response of modified, when the soil effect are taken into considerate.
Parametric Evaluation of Tall Structure with Various Lateral Load Resisting Systems Subjected to Dynamic Loadings
by Mahadevaprasad M | B S Sureshchandra "Parametric Evaluation of Tall Structure with Various Lateral Load Resisting Systems Subjected to Dynamic Loadings"
Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020,
Paper Url: https://www.ijtsrd.com/engineering/structural-engineering/33654/parametric-evaluation-of-tall-structure-with-various-lateral-load-resisting-systems-subjected-to-dynamic-loadings/mahadevaprasad-m
The high rise buildings are majorly suffering with seismic forces, it can be found out by displacement parameter. The more the displacement the lesser will be the stiffness of the structure. The static analysis is having higher displacement value than response spectrum analysis. The increase in percentage is about 17 . This will increase the construction cost due to increase in stiffness. The base shear value increases with increase in weight of the structure. However, the diagrid structure seems to be having lesser weight than all other models. From the overall analysis it is proved that, diagrid structure is very much effective than any other structure. However, in case of constraint in providing diagrid due to its architectural features, the outrigger system with bracing will be very much effective.
Paper Url: https://www.ijtsrd.com/engineering/structural-engineering/33390/seismic-analysis-of-multi-storey-rc-building-with-and-without-fluid-viscous-damper/varun-m
Earthquake is the important term that comes to mind while designing any multistory building. Earthquake is one of the most disastrous of natural criteria. Seismic waves are the main reason for development of vibration in the ground, impact of this will cause damage to the building. In this study G 12 storey building of rectangular plan is considered for the seismic analysis. The equivalent static method and response sectrum method is used for seismic evaluation of building with and without fluid viscous damper. ETABs 2017 software used for the analysis of the building, by considering seismic zone V and medium soil Type II as per IS 1893 2016. Storey displacement, storey shear, storey drift and modal periods and frequencies are considered for checking the performances of the building. Objective of this study is to compare results obtained from static and response spectrum analysis in both longitudinal and transverse direction for with and without damper building.
Paper Url: https://www.ijtsrd.com/engineering/civil-engineering/33392/analysis-and-design-of-a-multistory-reinforced-concrete-frame-in-different-seismic-zone/vikash-kumar
This study work focuses on the analysis of a structural system of a basic framework to decide the distortions and correlation of steel amount of seismic zones. In this examination, we have taken G 12 multi celebrated RC second opposing surrounded structure working with the shear divider by investigating the structure for gravity load, wind load and seismic burdens for various urban areas. By selecting four distinct urban communities based on seismic zones zone II, zone III, zone IV and zone V and furthermore thinking about that the fundamental breeze speed. We have predominantly center around the basic framework to decide the distortions and furthermore powers instigated by applied loads or ground excitation is a basic advance in the plan of a structure to oppose seismic tremor. The examination and plan for all the urban areas are completed utilizing STAAD Pro and STAAD Foundation programming which are industry standard programming the world over. The breeze safe structure is done according to IS 875 Part 3 1987 and the tremor safe plan is done according to IS 1893 Part 1 2002. Investigation and structure of bars, segments and shear divider have been done in STAAD Pro and the establishment is done in STAAD Foundation. We have additionally checked the structure of certain shafts, sections, and footings physically and find right. Structure of RCC chunks is completed physically for which an exceed expectations sheet is produced for working out second coefficients for various edge conditions according to IS code. In this investigation work, we plan and examine a strengthened solid casing structure in different seismic zones and we watching the variety in the conduct of the structure in various loading conditions.
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in this video i have explained all the different seismic analysis procedures. also i have given the details where to use which methods ie applicability of methods. i have given codals provision with reference. base shear concept and lateral load concept i have explained in detail.
how to calculate base shear . what is the importance of base shear. effect on roof displacement.
In order to perform the seismic analysis and design of a structure to be built at a particular location, the actual time history record is required. However, it is not possible to have such records at each and every location. Further, the seismic analysis of structures cannot be carried out simply based on the peak value of the ground acceleration as the response of the structure depend upon the frequency content of ground motion and its own dynamic properties. To overcome the above difficulties, earthquake response spectrum is the most popular tool in the seismic analysis of structures. There are computational advantages in using the response spectrum method of seismic analysis for prediction of displacements and member forces in structural systems. The method involves the calculation of only the maximum values of the displacements and member forces in each mode of vibration using smooth design spectra that are the average of several earthquake motions. This chapter deals with response spectrum method and its application to various types of the structures. The codal provisions as per IS:1893 (Part 1)-2002 code for response spectrum analysis of multi-story building is also summarized. Response spectra are curves plotted between maximum response of SDOF system subjected to specified earthquake ground motion and its time period (or frequency). Response spectrum can be interpreted as the locus of maximum response of a SDOF system for given damping ratio. Response spectra thus helps in obtaining the peak structural responses under linear range, which can be used for obtaining lateral forces developed in structure due to earthquake thus facilitates in earthquake-resistant design of structures. Pushover Analysis Amongst the natural hazards, earthquakes have the potential for causing the greatest damages. Since earthquake forces are random in nature & unpredictable, the engineering tools need to be sharpened for analyzing structures under the action of these forces. Earthquake loads are to be carefully modeled so as to assess the real behavior of structure with a clear understanding that damage is expected but it should be regulated. In this context pushover analysis which is an iterative procedure is looked upon as an alternative for the conventional analysis procedures. Pushover analysis of multi-story RCC framed buildings subjected to increasing lateral forces is carried out until the preset performance level (target displacement) is reached. The promise of performance-based seismic engineering (PBSE) is to produce structures with predictable seismic performance. The recent advent of performance based design has brought the non linear static push over analysis procedure to the forefront. Pushover analysis is a static non linear procedure in which the magnitude of the structural loading along the lateral direction of the structure is incrementally increased in accordance with a certain pre-defined pattern. It is generally assumed that the behavior of the structure is controlled by its fundamental mode and the predefined pattern is expressed either in terms of story shear or in terms of fundamental mode shape.
Comparative Study on Analysis and Design of Reinforced Concrete Building under Seismic Forces for Different Codal Guidelines
by Tabish Izhar | Samreen Bano | Neha Mumtaz "Comparative Study on Analysis and Design of Reinforced Concrete Building under Seismic Forces for Different Codal Guidelines"
Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-4 , June 2019,
Paper URL: https://www.ijtsrd.com/engineering/structural-engineering/23819/comparative-study-on-analysis-and-design-of-reinforced-concrete-building-under-seismic-forces-for-different-codal-guidelines/tabish-izhar
international journals in engineering, engineering journal, paper publication for engineering,
Construction is a vital part of every developing country in this era. Every country has specific building design codes which provide the standards to engineers for the design of various structural components like the beam, column, and slab. Analysis and design Reinforcement concrete building of every country is based on their geographical location. Seismic forces are one of the major natural forces causing huge damage to lives and economy. So that one can understand the difference and can appropriate for best guidelines for safety to lives and economy. In today's world of globalization, an engineer must be efficient enough to understand and handle different codes. In this paper, a comparative study is presented for analysis and design of reinforced concrete building under seismic forces for four codal Guidelines IS 1893 2002, Euro code 8, Japan 2007 and ASCE 7 10 using Staad Pro. The comparative study includes the comparison building base shear, bending moment, shear force, percentage of steel, required area, displacement, and story drift. For seismic Analysis and design, the building elements like beam and column is also compared using these countries RC building code.
