Advanced Gyro Lumped Parameter Model And Its Application To Pile Groups Supporting Multistory Buildings

955 words - 4 pages

11ME136　Naba Raj Shrestha
Supervisor　Assoc. Prof. Masato Saitoh

A simplified and efficient soil structure interaction (SSI) method has been proposed for structures supported by pile foundation system using recently proposed lumped parameter model with gyro-element (GLMP) which shows efficient and accurate representation of frequency dependent impedance function (IFs) of the soil-foundation systems. The original GLPM has been transformed to make the gyro-element compatible with the conventional software framework. The transformed GLPM has been verified with the IFs of a pile group supporting a single degree of freedom system and implemented in multi-story building supported by a pile group. The effects of frequency dependent characteristics have been studied for the multi-story building by comparing the results with conventional Kelvin-Voigt model and rigid foundation system. OpenSees software framework has been used in the modelling of superstructure and foundation system with GLPM. The results show significant effects of the frequency dependent IFs on the response of the foundation.

1. INTRODUCTION

In general, the impedance functions (IFs) of the soil-foundation system show frequency dependent characteristics and thus frequency domain analysis is compulsory to incorporate them. However, time history analysis is mandatory to integrate the inelastic behavior of materials and structural members which strongly depends on the stress path being integrated stepwise 1). Although varieties of methods are available to consider the frequency dependent IFs in a time history analysis, they are either very complex for practical use having many numbers of elements and degrees of freedom or they do not represent the frequency dependent IFs with sufficient accuracy.
Recently, Saitoh 1) proposed a simple lumped parameter model with gyro-element (GLPMs) which is considered to be a sophisticated model for representing frequency dependent IFs 2). However, the implementation of the GLPMs model in the conventional software in the practical application still remains left.
In this study, a transformation methodology of GLPMs has been proposed and verified by using it in a single degree of freedom (SDOF) structural system supported by pile foundation taken from a literature 2) in the frame work of Open System for Earthquake Engineering Simulation (OpenSees). Transformed GLPMs are then applied to a three dimensional multi-degree-of-freedom system in OpenSees. The effect of frequency dependent IFs on the structural response is studied in terms of the time-history responses and inter-story drift. The input motions are magnified to make the structural behavior in inelastic region.

Fig. 1 The original type II GLPMs model 1) (a); and the transformed GLPMs (b)

2. GLPMS AND ITS TRANSFORMATION

The GLPMs consist of conventional springs and dashpots and newly proposed gyro-elements (Fig 1(a)). Further details of GLPMs can be found in Saitoh 1) .
The...

Fiber Reinforced Concrete and Its Application

928 words - 4 pages AIM: The aim of this topic is to define fiber reinforced concrete and its application, it important properties as well as it superior resistance to cracking. As a result of the ability of fiber to arrest cracks, the composites of fiber possesses an increased in tensile strength both at the first crack and at ultimate, especially under flexural loading, and the fibers can still hold the matrix together even after a lot of cracking.  Introduction

An assessment of the BEST model and its approach to teamwork:

1761 words - 7 pages Table of Contents 1. Introduction: 2 2. Nature of the project: 2 3. An assessment of the BEST model and its approach to teamwork: 2 3.1. An overview of the BEST model in respect of teamwork: 2 3.2. Comparing the components of management quality to the BEST model: 2 3.2.1. Employee Development: 2 3.2.2. Communication: 2 3.2.3. Performance Measurement: 2 3.2.4. Employee participation: 3 3.2.5. Integration: 3 3.2.6. Delegation: 3 3.2.7. Direction

Fashion and Its Evolved from a Typical White Model to a Diverse Runway Show

1482 words - 6 pages , which means that the colors used for the garment were bold and only white models can wear this without out staging the clothes. The rise of African Americans in the fashion industry also depends on the location where the model is pursuing to work. The most influential places of fashion are New York, United States. Paris, France. London, England. Milan, Rome, Italy. It is hard to analyze why only white models were used to represent a designer on

Social Loafing and Recommendations on How to Reduce Its Occurrence within Groups Working on University Poster Presentations

1765 words - 7 pages Social Loafing and Recommendations on How to Reduce Its Occurrence within Groups Working on University Poster Presentations Abstract Social loafing occurs in groups and reduces group effectiveness and productivity. Various literatures on social loafing reviewed suggest that the group size, the identifiably of the participants, the evaluation of their performance, people’s beliefs about their feelings of uniqueness

Families and Deinstitutionalization: An Application of Bronfenbrenner's Social Ecology Model

5190 words - 21 pages followed by application of this model to both understanding families and providing interventions.OVERVIEW OF BRONFENBRENNER'S SOCIAL ECOLOGY MODELBronfenbrenner's (1979) social ecology model focuses on the developing person, the environment, and the evolving interaction between the person and the environment. Later work by Bronfenbrenner (1986) expanded to a family focus, specifically, "external influences that affect the capacity of families to

‘The increasing application of Scientific Management principles of work organisations to services is, despite its limitations, inevitable and irreversible’. Discuss

1997 words - 8 pages Essay on organisational behavior within companies -'The increasing application of Scientific Management principles of work organisations to services is, despite its limitations, inevitable and irreversible'. Discuss.___________MScAdam Cossey(c)'The increasing application of Scientific Management principles of work organisations to services is, despite its limitations, inevitable and irreversible'. Discuss.I IntroductionFrom the outset of this

Applying Concepts Relating to Groups and Organizations

936 words - 4 pages . federal postal system was Friday, March 21, 2014. I did not actually buy the stamp and place the letter in the mailbox, my father did. In some ways I benefit from using networks, but in other ways I am harmed by using them. One benefit of Facebook, for example, would be the fact that it can help grow relationships within and connect different social groups. It can also connect a peer group. On the other hand, it can harm a person’s ability to

Orem’s Self Care Deficit Theory and its Application in Practice

1080 words - 4 pages One of the theories of nursing is Dorothea Orem’s self-care theory, also called the self-care deficit theory. Nursing theories are important for several reasons. The profession is strengthened when knowledge is built on sound theory (Black, 2014). Theory is important for reasoning, thinking, decision-making, and supporting excellence in practice (Black, 2014). Dorothea Orem’s theory is a conceptual model that provides a structure for critical

Fiberglass and Its Application for Standard Commercial Step Ladders

1838 words - 8 pages Introduction This analysis focuses on the material selection of Fiberglass and its application for standard commercial step ladders. Step ladders are an integral tool in both construction and the workplace. They are additionally dangerous to use. Having come from a family that was involved in commercial construction, I have firsthand experience with very large step ladders. Still, one may consider such research into ladders as mundane and near

Competitive Advantage and its Application within the Aviation Industry

1689 words - 7 pages In order to fully understand competitive advantage and its application with in the aviation industry, it is first important to consider its definition. According to Chaston (2012), a sustainable competitive advantage is long-term strategic thinking adopted by a firm through which they exceed the other firm’s performance dealing with the same customer(s) and same market area(s). An alternative definition is, the power of an organisation to do

Characteristics of Protein Based Biopolymer and Its Application

834 words - 4 pages collagen consists of three left-handed helices twisted into a right-handed coil. Collagen is a cluster of naturally occurring proteins found in animals, due to its unusual characteristics, such as biodegradability and weak antigenecity [35], it is an important biomaterials for tissue engineering applications. Collagen fibres are commonly white, opaque and viscoelastic matter acquire high tensile strength and little extensibility. Thus collagen have

Mini Essay: Circular Flow Model "Explain The Circular Flow Model. What Assumptions Is It Based Upon? How Is Equilibrium Determined In The Model? Explain Its Application In The Real World."

1236 words - 5 pages The circular flow of income model is a theoretical representation of the economy. It shows the distribution of income within the economy and the interaction between the different sectors in a modern market economy. The five-sector model is a more elaborate model in comparison to the basic, two, three and four sector models. The model represents an economy like Australia and divides the economy into five main sectors.The first sector in the model

Virginia Henderson’s Concepts Of Nursing And Its Application To Practice

1603 words - 6 pages The purpose of this paper is to illustrate the key points of Virginia Henderson’s theory “Concepts of Nursing” (CON) and its application in practice using specific examples. Henderson’s CON is a grand theory written in 1978. (Waller-Wise, 2013) The CON theory provides a definition of nursing care, responsibilities and a focus on specific areas where nursing care is required. (Waller-Wise, 2013) As Henderson (1978) writes, “Nursing is primarily

Relationa Maintanence And Family Communication Advanced Interpersonal Communications Application Paper

1898 words - 8 pages , knowing his repetitive excuses. Gable’s Active-Passive/Constructive-Destructive Response Model Our responses to others can be evaluated in terms of two dimensions: Active-passive level of involvement which is a displays interest and enthusiasm of what was said or done and constructive-destructive- which combines the feedback as helpful and positive or hurtful and negative. Within these two dimensions, there are four possible ways in which you

The Application Of The Response To Intervention Model

760 words - 4 pages parents, former teachers, and counselors. From this information the teacher is able to see what gift or talent the student has, and how to bypass their disability, for example a student can participate in advanced discussion of a book when she uses audiobooks. The teacher can also know in what specific area the student needs more help and thus applying the second or if necessary the third tier in the RTI model. Students who do not demonstrate the