scholarly journals N. Z. parliament buildings seismic protection by base isolation

1992 ◽  
Vol 25 (3) ◽  
pp. 147-160 ◽  
Author(s):  
R. A. Poole ◽  
J. E. Clendon
Keyword(s):  
Base Isolation ◽  
Public Spaces ◽  
Seismic Protection ◽  
Seismic Loads ◽  
Structural System ◽  
Ground Floor ◽  
Analysis And Design ◽  
Basement Walls

Parliament House is to be partially demolished and rebuilt, extended within the existing perimeter envelope, refurbished and replanned except for the major public spaces, seismically upgraded by means of base isolation and enhancement of existing foundations, basement walls, ground floor, upper floor walls and floors. This paper describes the assessment of appropriate seismic loads, the structural system, the analysis and design of the retrofitted structure. Anticipated construction procedures and difficulties are also addressed.

Passive Control Techniques for Seismic Protection of Chemical Plants

2020 ◽  
Author(s):  
Keisuke Minagawa ◽  
Fabrizio Paolacci
Keyword(s):  
Passive Control ◽  
Base Isolation ◽  
Seismic Damage ◽  
Pressure Vessels ◽  
Chemical Plant ◽  
Seismic Protection ◽  
Economic Losses ◽  
Chemical Plants ◽  
Northridge Earthquake ◽  
Control Techniques

Abstract Seismic damage of chemical plant facilities (pressure vessels, piping, storage tanks, etc..) can causes human and economic losses as well as heavy environmental damages. Therefore, it is of paramount importance to reduce such a consequences. The passive control techniques (PCT) as dampers or base isolation can represent an effective technique to mitigate the major damage caused by earthquakes. Viscous dampers, tuned mass dampers and base isolators are well-known passive control devices successfully applied to civil structures, as demonstrated during the last big events as Northridge earthquake in 1994, the Kobe earthquake in 1995, the Great East Japan earthquake in 2011. The scarce application to major hazard industrial facilities as chemical plants poses some questions, including the selection of suitable devices, their real applicability and effectiveness, because of the strict requirements of chemical plant equipment in terms of safety and business continuity. Therefore, this study aim at analyzing the possible applications of the most renew passive control techniques for seismic protection for chemical plant components. In this respect, a complete review of typical seismic damage of industrial (chemical) facilities and the investigation of the applicability of PCT as mitigation strategy is offered for all possible structural typologies of units presents in a plant.

Passive Seismic Protection of Building Piping Systems — A Review

2020 ◽  
Vol 20 (03) ◽  
pp. 2030001 ◽  
Author(s):  
Jie Tan ◽  
Peng Zhang ◽  
Qian Feng ◽  
Gangbing Song
Keyword(s):  
Base Isolation ◽  
State Of The Art ◽  
The State ◽  
Seismic Protection ◽  
Internal Stresses ◽  
Piping System ◽  
Seismic Safety ◽  
Nonstructural Components ◽  
Piping Systems ◽  
Passive Seismic

Piping systems are typical nonstructural components of a building. Previous investigations have reported many cases that earthquake causes damages or failures of piping system, resulting in secondary disasters. Therefore, this paper conducts a survey of the seismic damage of the piping systems of buildings and then reviews the state-of-the-art of the passive seismic protection methods. This paper proposes to classify the building piping system into rigid connected pipes, flexible connected pipes and semi-rigid connected pipes. Typical seismic damages of building pipes are presented following this classification. Then, several current seismic protection methods (including constructional measures, seismic braces, damping techniques and base isolation methods) are discussed regarding the theoretical mechanism and feasibility. Furthermore, the state-of-the-art of the building piping system and the passive protection methods with application prospects are evaluated. Based on the review, the flexible piping systems are most commonly used in existing old buildings and are more vulnerable in earthquakes due to their high flexibility. New buildings prefer the rigid connections which tend to restrain the motion of the pipe. However, the excessive stiffness of the rigid connection may cause overlarge internal stresses in both the connection and the pipe. Semi-rigid piping systems have sufficient overall stiffness and a degree of local deform ability and thus have the best seismic performance. In future studies, more research should be devoted to propose and develop new dampers suitable for piping systems, which will improve the seismic safety of building piping systems.

scholarly journals Using Data on Bike-Sharing System User Stopovers in Smart Tourism: A Case Study

2021 ◽  
Vol 23 (2) ◽  
pp. G1-G12
Author(s):  
Krystian Banet
Keyword(s):  
Smart Cities ◽  
Public Spaces ◽  
Data Filtering ◽  
Analysis And Design ◽  
Filtering Method ◽  
Bike Sharing ◽  
System User ◽  
Using Data ◽  
Smart Tourism

Bike-sharing systems are an important element in development of the smart cities and datasets from these systems are one of the ways to obtain large amount of information on bicycle traffic. These usually contain data on the origin and destination of each trip, as well as its time and duration. Alongside the basic data, some operators also provide information on the exact route picked by each user. This allows researchers to study stopovers, which may serve as a source of interesting information on human behaviour in public spaces and, as a consequence, help improve its analysis and design. However, using the raw data may lead to important errors because most stops occur in the vicinity of bike stations or are related to traffic problems, as evidenced by the case study of Cracow. The data filtering method proposed below opens up the possibility for using such datasets for further research on bike user behaviour and public spaces.

scholarly journals Perusal of Multi Storey Light Frame Shear Wall by Manual Check and Finite Element Method

2019 ◽  
Vol 8 (6) ◽  
pp. 569-574
Keyword(s):  
Seismic Analysis ◽  
Shear Walls ◽  
Shear Wall ◽  
Lateral Force ◽  
Seismic Loads ◽  
Lateral Loads ◽  
Structural System ◽  
Reinforced Masonry ◽  
Paper Work ◽  
Made In

Shear walls are a structural system which gives solidness or stability to structures from lateral loads like wind, seismic loads. The structural systems are fabricated by reinforced concrete, plywood/timber unreinforced, reinforced masonry at which these systems are subdivided into coupled shear walls, shear wall frames, shear panels and staggered walls. The present paper work was made in the interest of studying and analysis of various research works involved in enhancement of shear walls and their behaviour towards lateral loads. In SAP2000 analysis we found that when we apply lateral force between the stories the amount of compression and tension force between the stories obtained is equal to the manual analysis .In STAAD.PRO, we analyzed the light frame shear wall for seismic analysis. The estimated results for light frame shear wall with one storey, shear wall with two storey and shear wall with three storey shown similar to the results which are obtained by using FEM software like STAAD and SAP2000.

scholarly journals Optimal Topologies for Steel Frames with Ordinary Chevron and X-Braces: The Effect on Total Structural Cost

2016 ◽  
Vol 10 (1) ◽  
pp. 677-684
Author(s):  
Mehdi Babaei ◽  
Jalal Dadash Amiri ◽  
Foad Omidi ◽  
Arman Memarian
Keyword(s):  
Steel Structures ◽  
Soil Conditions ◽  
Span Length ◽  
System Construction ◽  
Structural System ◽  
Analysis And Design ◽  
Effective Factor ◽  
Building Models ◽  
System Selection ◽  
The Impact

Today, steel structures with simple frames and concentric steel bracings (both crossed and chevron type) are extensively used in different countries, as well as in Iran. Apart from the seismic performance of each structural system, construction cost plays a significant role in system selection by designers. In an attempt to optimize structural costs, this study aims at examining the number of floors, span length, soil conditions, and brace type. In this study the impact of these factors on structural costs are evaluated. Since parking areas are the most important architectural requirement, therefore specified span widths accommodating two, three, and four vehicles are selected for the models. To this end, regular building models with different span (5.6, 7.5, and 11.2m) are selected according to such architectural considerations. Following structural analysis and design, total structural costs are estimated according to the latest national cost list issued by the Management and Planning Organization of Iran (published in 2014). The results are obtained and reported for different models through graphs and tables. The outcomes are evaluated and compared. Finally, the optimal topologies in terms of structure weight and total cost are determined, along with introducing the most effective factor among span length, story number, brace type, and soil type.

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