Paper Url: https://www.ijtsrd.com/engineering/structural-engineering/33437/comparative-study-of-different-lateral-load-resisting-system-on-different-shapes-of-building/shashikala
For quake safe plan the ordinary structure ought to have the option to oppose minor, moderate, cut off shaking. In the conditions of the structure, basic shape arrangement building move the seismic tremor power in the immediate way to the base while fit as a fiddle constructing, the heap moving way is roundabout which prompts age of worries at the corners Structure architects need to plan and assemble a structure wherein the harm to the structure and its structure part by quake is limited. From the past investigations and structure originators explores, they discovered different parallel burden opposing frameworks like Shear wall systems, Bracing systems, Flat slab systems, etc. lateral load has great significance in design as the height of building increases parallel burden turns out to be more prevailing than gravity burden or vertical heap of building. Horizontal burden, for example, Wind load and Seismic Load are follow up on the tall structure. These loads are resisted by various lateral load resisting systems. The primary boundaries considered in this report is to contrasting the seismic presentation of various models for direct static investigation are Top storey displacements, Storey drift ratios, Storey shears and for dynamic analysis are Torsion moments, Time Period and Response Spectrum.
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.
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.
