scholarly journals Seismic Response of Large span slab in Horizontal Setback Building

2021 ◽  
Vol 9 (11) ◽  
pp. 1353-1360
Author(s):  
Manish Kumar Pandey
Keyword(s):  
Structural Elements ◽  
Commercial Building ◽  
Flat Slab ◽  
Large Span ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Different Types ◽  
Waffle Slab ◽  
Earthquake Zone ◽  
Structural Engineers

Abstract: The demand for multi-storey buildings is increasing day by day. Residential plus commercial building is mainly used for wide span needs. Wide span required for Flat slab, Waffle slab and ribbed slab stands An excellent option for architects when larger openings in a building need to be covered with as few columns as possible. The use of different types of plates is developing as a new trend and is becoming a major challenge for structural engineers. Therefore, it is necessary to study about its structural behavior. The project is carried out under earthquake zone III under the earthquake analysis of G+9 storey building. For this study, four different types of large span slab structure are modelled in C-shape (Horizontal Setback Building) having 10-stories i.e. G+9 storied buildings with 3.50 meters height for each story is modelled and analysed. The plan area of all four buildings is same i.e. 2859 square meters (49.50 m x 82.50 m) each. These buildings were designed in compliance with the Indian Code of Practices for earthquake resistant design of buildings. Base of the building were fixed. The square sections are used for structural elements. The height of the buildings is considered constant throughout the structure. The buildings are modelled using ETABSvr.2016. Keywords: large span slab, ETABSvr.2016, Horizontal Setback Building, Flat slab, Waffle slab and ribbed slab

scholarly journals Seismic Response of Large span slab in Horizontal Setback Building: A Review

2021 ◽  
Vol 9 (10) ◽  
pp. 508-514
Author(s):  
Manish Kumar Pandey
Keyword(s):  
Seismic Response ◽  
Structural Behavior ◽  
Commercial Building ◽  
Flat Slab ◽  
Large Span ◽  
Multistory Building ◽  
Effective Manner ◽  
Different Types ◽  
Structural Engineers ◽  
Day By Day

Abstract: The demand of multistory Building is increases day by day. The residential plus commercial building predominantly used for the need of large span. The large span is needed for Flat slab, Waffle slabs & ribbed slab stands as an excellent option for architects when larger spans in a building has to be covered with the least possible number of columns. The use of different types slabs are evolving as a new trend and are becoming a big challenge for structural engineers. Therefore it is necessary to study about its structural behavior. The paper is review the behavior of different types slab for large span type of building. Final aim to gets the suitable type of slab for large span for effective manner. It is found that very less work is taken setback building with large span, it is required to analysis on the setback building with large span. Keywords: Flat slab, Waffle slabs, ribbed slab, multistory Building, large span.

Proposal of orientation-independent measure of intensity for earthquake-resistant design

2021 ◽  
pp. 875529302110382
Author(s):  
Alan Poulos ◽  
Eduardo Miranda
Keyword(s):  
United States ◽  
Ground Motion ◽  
The United States ◽  
Design Codes ◽  
Intensity Measure ◽  
Independent Measure ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Ground Motion Records ◽  
Structural Engineers

A new measure of ground motion intensity in the horizontal direction is proposed. Similarly to other recently proposed measures of intensity, the proposed intensity measure is also independent of the as-installed orientation of horizontal sensors at recording stations. This new measure of horizontal intensity, referred to as MaxRotD50, is defined using the maximum 5%-damped response spectral ordinate of two orthogonal horizontal directions and then computing the 50th percentile for all non-redundant rotation angles, that is, the median of the set of spectral ordinates in a range of 90°. This proposed measure of intensity is always between the median and maximum spectral ordinate for all non-redundant orientations, commonly referred to as RotD50 and RotD100, respectively. A set of 5065 ground motion records is used to show that MaxRotD50 is, on average, approximately 13%–16% higher than Rot50 and 6% lower than RotD100. The new measure of intensity is particularly well suited for earthquake-resistant design where a major concern for structural engineers is the probability that the design ground motion intensity is exceeded in at least one of the two principal horizontal components of the structure, which for most structures are orthogonal to each other. Currently, design codes in the United States are based on RotD100, and hence using MaxRotD50 for structures with two orthogonal principal horizontal components would result in a reduction of the ground motion intensities used for design purposes.

Storage Tanks Under Earthquake Loading

1990 ◽  
Vol 43 (11) ◽  
pp. 261-282 ◽  
Author(s):  
Franz G. Rammerstorfer ◽  
Knut Scharf ◽  
Franz D. Fisher
Keyword(s):  
Earthquake Engineering ◽  
Numerical Models ◽  
Vertical Axis ◽  
Storage Tanks ◽  
Strongly Nonlinear ◽  
Liquid Storage ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Different Types ◽  
Interaction Problem

This is a state-of-the-art review of various treatments of earthquake loaded liquid filled shells by the methods of earthquake engineering, fluid dynamics, structural and soil dynamics, as well as the theory of stability and computational mechanics. Different types of tanks and different possibilities of tank failure will be discussed. We will emphasize cylindrical above-ground liquid storage tanks with a vertical axis. But many of the treatments are also valid for other tank configurations. For the calculation of the dynamically activated pressure due to an earthquake a fluid-structure-soil interaction problem must be solved. The review will describe the methods, proposed by different authors, to solve this interaction problem. To study the dynamic behavior of liquid storage tanks, one must distinguish between anchored and unanchored tanks. In the case of an anchored tank, the tank bottom edge is fixed to the foundation. If the tank is unanchored, partial lifting of the tank’s bottom may occur, and a strongly nonlinear problem has to be solved. We will compare the various analytical and numerical models applicable to this problem, in combination with experimental data. An essential aim of this review is to give a summary of methods applicable as tools for an earthquake resistant design, which can be used by an engineer engaged in the construction of liquid storage tanks.

Optimal load factors for earthquake-resistant design of buildings located at different types of soils

2021 ◽  
Vol 34 ◽  
pp. 102026
Author(s):  
Miguel A. Orellana ◽  
Sonia E. Ruiz ◽  
Juan Bojórquez ◽  
Alfredo Reyes-Salazar ◽  
Edén Bojórquez
Keyword(s):  
Earthquake Resistant Design ◽  
Load Factors ◽  
Optimal Load ◽  
Earthquake Resistant ◽  
Different Types

scholarly journals Earthquake resistant design of foundations

1996 ◽  
Vol 29 (3) ◽  
pp. 155-171 ◽  
Author(s):  
M. J. Pender
Keyword(s):  
Soil Properties ◽  
State Of The Art ◽  
Deep Foundations ◽  
Foundation Design ◽  
Analysis Techniques ◽  
Current State ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Structural Engineers ◽  
Potential Use

This paper reviews the main issues to be addressed in the design of shallow and deep foundations which may be subject to earthquake loading. Information is presented on the soil properties required as well as the various design analysis techniques with a view to assessing the current state-of-the-art and highlighting areas in which further techniques need to be developed. The paper sets out, by way of an overview, a sequence of steps that a designer may follow in developing a foundation system. It is concluded that, at present, the greatest deficiencies lie in the areas of most potential use to designers. A secondary aim of the paper is to enhance communication between geotechnical and structural engineers on aseismic foundation design.

scholarly journals Stability Analysis of High Rise Buildings by altering the Beam Members

2021 ◽  
Vol 9 (11) ◽  
pp. 1345-1352
Author(s):  
Ankur Nagar
Keyword(s):  
Soil Type ◽  
Essential Elements ◽  
Type Ii ◽  
Basic Part ◽  
Code Of Practice ◽  
High Rise ◽  
Earthquake Resistant ◽  
Different Types ◽  
Earthquake Zone ◽  
Building Elements

Abstract: A structure can be build with different building elements. These building elements are basic part to resist the various loads and stress acting on it. The Beam is on the basic and essential elements under it to resist the bending behaviour on the structure. The project deals with four different types of 17 storied structures are modelled by altering beam members having rectangular shape i.e. G+16 storied building with 3.50 meters height for each story is modelled and analysed. The plan dimension of all four buildings is kept same i.e. 15.15 m x 46.35 m each. These buildings are designed in accordance with the Indian Code of Practice for the design of earthquake resistant buildings. Base of the building were fixed. The height of the buildings is considered constant throughout the structure. The buildings are modelled using ETABSvr.2018. The model has been studied in the earthquake zone IV and soil type II. Keywords: ETABSvr.2018, Beam, zone IV, Soil Type II, altering beam members

scholarly journals The measurement of ground motion of destructive earthquakes

1963 ◽  
Vol 53 (2) ◽  
pp. 419-437
Author(s):  
D. E. Hudson
Keyword(s):  
United States ◽  
Transient Response ◽  
Strong Motion ◽  
The United States ◽  
Geodetic Survey ◽  
Natural Period ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
The World ◽  
Structural Engineers

abstract The need for a greatly expanded network of strong-motion accelerographs throughout the seismic regions of the world is stressed. A summary of the characteristics of currently available strong-motion accelerographs is presented, and the design details are given for an instrument suitable for acquiring the basic data needed by structural engineers for earthquake resistant design. It is shown that for such an instrument, the natural period must be less than 0.1 seconds, and that the recording speed must be at least 1 cm/sec. The critical nature of the inertia starting device is discussed, and some information is given on the transient response of the standard pendulum starter used in the United States Coast and Geodetic Survey Strong-Motion Accelerograph. The use of simpler, non-time-recording instruments such as the U.S.C.G.S. Seismoscope to supplement the accelerograph network is described.

scholarly journals FUNDAMENTAL STUDY ON EARTHQUAKE RESISTANT DESIGN OF FILL-TYPE DAMS

1983 ◽  
Vol 1983 (339) ◽  
pp. 127-136 ◽  
Author(s):  
Yoshio OHNE ◽  
Hidehiro TATEBE ◽  
Kunitomo NARITA ◽  
Tetsuo OKUMURA
Keyword(s):  
Fundamental Study ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant

A NEURAL NETWORK-WAVELET MODEL FOR GENERATING ARTIFICIAL ACCELEROGRAMS

2004 ◽  
Vol 02 (03) ◽  
pp. 217-235 ◽  
Author(s):  
GENE F. SIRCA ◽  
HOJJAT ADELI
Keyword(s):  
Neural Network ◽  
Geographic Location ◽  
Training Data ◽  
Wavelet Network ◽  
Design Spectrum ◽  
Earthquake Resistant Design ◽  
Earthquake Resistant ◽  
Structural Configurations ◽  
Earthquake Accelerograms ◽  
Artificial Accelerograms

In earthquake-resistant design of structures, for certain structural configurations and conditions, it is necessary to use accelerograms for dynamic analysis. Accelerograms are also needed to simulate the effects of earthquakes on a building structure in the laboratory. A new method of generating artificial earthquake accelerograms is presented through adroit integration of neural networks and wavelets. A counterpropagation (CPN) neural network model is developed for generating artificial accelerograms from any given design spectrum such as the International Building Code (IBC) design spectrum. Using the IBC design spectrum as network input means an accelerogram may be generated for any geographic location regardless of whether earthquake records exist for that particular location or not. In order to improve the efficiency of the model, the CPN network is modified with the addition of the wavelet transform as a data compression tool to create a new CPN-wavelet network. The proposed CPN-wavelet model is trained using 20 sets of accelerograms and tested with additional five sets of accelerograms available from the U.S. Geological Survey. Given the limited set of training data, the result is quite remarkable.

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