Equivalent Static Eccentricities in the Simplified Methods of Seismic Analysis of Buildings

1998 ◽  
Vol 14 (1) ◽  
pp. 1-34 ◽  
Author(s):  
K. Anastassiadis ◽  
A. Athanatopoulou ◽  
T. Makarios
Keyword(s):  
Dynamic Response ◽  
Parametric Analysis ◽  
Seismic Analysis ◽  
Simplified Model ◽  
Exact Calculation ◽  
Lateral Stiffness ◽  
Correct Evaluation ◽  
Static Eccentricity ◽  
Seismic Forces

The equivalent static eccentricities of seismic forces are usually defined by codes with simple expressions of the static eccentricity. This paper presents certain formulae for the exact calculation of these eccentricities on the basis of the dynamic response of a simplified model. From the parametric analysis of such formulae the determinative role of the torsional and lateral stiffness of the system becomes obvious for the correct evaluation of the equivalent static eccentricities. Finally, a proposal is made for the improvement of the static torsional provisions of the current codes.

scholarly journals Role of expansion joint in the study of seismic analysis of a multi-storied building

2021 ◽  
Vol 309 ◽  
pp. 01115
Author(s):  
Meera Arun ◽  
T Srinivas ◽  
PVVSSR Krishna
Keyword(s):  
Shear Force ◽  
Seismic Analysis ◽  
Bending Moment ◽  
Filler Material ◽  
Expansion Joint ◽  
Expansion Joints ◽  
Seismic Forces ◽  
The Cost ◽  
Bottom To Top

In this paper, the study on the multi-storied building with and without expansion joint when it is subjected to seismic forces in both x and y direction are taken into consideration. By maintain same floor area of different plans the expansion joint is provided along the weaker column forces stretch and stiffed the building in order to make more resistant when compared to the plans without expansion joints. The analysis is done using ETABS 2016. The parameters such as shear force and bending moment at the critical column are considered and compared for with expansion joint and without expansion joint. It is concluded that the L shaped building shear force is being decreased from the bottom to top storey of the building when compared to without expansion joint. The effect of expansion joint is shown effectively on U-shaped building in terms of reduction of shear force and bending moment when compared to L-shaped and T-shaped, it is because of providing two expansion joints since there are two critical and weaker columns stretch. When it comes to economy of the structure, the cost of the construction of the structure with expansion joint is relatively high but it can resistant far better in case of seismic forces. The future scope of the study can be the type of filler material to be used such that the reduction of cost and to maintain structure integrity.

scholarly journals On Predicting the Seismic Response of Acceleration-Sensitive Non-Structural Components in Buildings

2018 ◽  
Author(s):  
Carmine Lima ◽  
Enzo Martinelli
Keyword(s):  
Dynamic Response ◽  
Seismic Response ◽  
Parametric Analysis ◽  
Short Review ◽  
Structural Components ◽  
Main Structure ◽  
Current State ◽  
Critical Issues ◽  
Key Features ◽  
Two Degree Of Freedom

This paper is intended at highlighting the main mechanical parameters controlling the behavior of the so-called "acceleration-sensitive" Non-Structural Components (NSCs). In the first part a short review of the current state of knowledge and the critical issues related to the prediction of the seismic response of NSCs is reported. Then, the paper presents the results of a numerical parametric analysis intended to capture the key features of the dynamic response of a two-degree-of-freedom (2DOF) system which is supposed to be representative of both the main structure and the "non-structural" component (NSC). Particularly, it allows to simulate the coupled behaviour of both main structure and NSC and evaluating their response. The main parameters controlling the dynamic response of NSCs emerge from this study, which could pave the way towards formulating more mechanically consistent relationships for evaluating the maximum accelerations induced by seismic shakings on NSCs.

Simplifying the Complexities of Negligence Law – A Joint Academic/Judicial Proposal

2020 ◽  
Vol 10 (3) ◽  
pp. 207-256
Author(s):  
Israel Gilead
Keyword(s):  
Common Law ◽  
Simplified Model ◽  
Duty Of Care ◽  
Natural Evolution ◽  
The Third ◽  
Short Overview ◽  
Canadian Law ◽  
Proposed Model ◽  
Negligence Law

AbstractOver a century, common law judges, academics, and practitioners have struggled with the complexities of negligence law. All agree that negligence liability is imposed on a defendant whose unreasonable conduct caused foreseeable harm to the plaintiff, and who owed a duty of care to the plaintiff. But views differ considerably as to the meaning and role of each element (unreasonable conduct, harm causation, duty), the test and the relevant considerations that should be applied to each, the interrelation between these elements, and the meaning and role of the foreseeability requirement in each element. Against this background, the author has argued for years that the above complexities can be easily solved by a simplified model of negligence. Recently the author’s model has been embraced by Israeli justices and judges. The article presents the proposed model, explains how it solves the described complexities, and fends off criticism. It then demonstrates the model’s operation by applying it to the 2018 SCC’s decision in the Rankin case. A glimpse at the Third Restatement on Torts shows that it steers in the same direction, as evidenced by an analysis of the Palsgraf case and the unforeseeable plaintiff question. Following a short overview of leading British cases from Donoghue to the 2018 decision in Robinson, it is argued that a shift to the proposed model would be a natural evolution that can be easily achieved. In contrast, it is argued that Canadian law has moved in another direction, for incorrect reasons. The model is then compared with another reform recently suggested in the literature. Finally, fault-based liability in continental Europe is viewed from the perspective of the proposed model.

scholarly journals The Role of Canceled Warrants in the LME Market

2019 ◽  
Vol 7 (1) ◽  
pp. 10 ◽  
Author(s):  
Jaehwan Park
Keyword(s):  
Dynamic Response ◽  
Regression Model ◽  
Positive Impact ◽  
Positive Effect

This article visits the question of whether canceled warrants (CWs) have a positive effect on LME metal prices. To examine this question carefully, a regression model is applied. This paper finds a statistically significant positive link between CWs and LME metal prices, including aluminum, zinc, tin, and nickel. However, other metals such as copper and lead are not statistically significant. The second objective of the study is to identify the dynamic response of metal price returns for aluminum, zinc, tin, and nickel to an innovation in the CWs using VAR. It is found that the positive impact of the CWs on metal returns is transitory.

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