scholarly journals ANALYSIS OF THE REINFORCEMENT OF A STEEL STRUCTURE WITH CONCENTRIC DIAGONALS. MANTA UVC CASE

2021 ◽  
Author(s):  
Julia Pilatasig ◽  
◽  
Roberto Aguiar ◽  
Brian Cagua ◽  
Oscar Andachi ◽  
...  
Keyword(s):  
Seismic Analysis ◽  
Steel Structure ◽  
Original Structure ◽  
Longitudinal Reinforcement ◽  
Computational System ◽  
Axial Capacity ◽  
Earthquake Resistant ◽  
Earthquake Load ◽  
The City ◽  
Modal Method

The Pedernales earthquake in 2016 affected several structures, an example is the UVC in the city of Manta, in which a post-earthquake reinforcement with inverted V-shaped diagonals was performed. This paper presents an analysis of the structure without reinforcement and with longitudinal reinforcement, using functions of the CEINCI-LAB Computational System to determine displacements, drifts, and floor shear, in a seismic analysis with the spectral and static equivalent modal method using the spectrum of Manta 2016. In addition, the demand is determined according to the NEC-15 load combinations, using the live, dead and earthquake load states; for the verification of the axial capacity of columns, the effect of the earthquake is used, considering the over-resistance. After that, a design by capacity is carried out in the structure without reinforcement, based on the capacity of the beams, and in the case of reinforcement, an analysis is carried out based on the capacity of the diagonals. It is observed that both the original structure and the reinforcement do not comply with the earthquake resistant philosophy, and it is likely that an earthquake will be affected in a future.

Regeneration of a historic city block: the example of the relocation of the historic Atelier building to the cloister area of the Congregation of the Resurrection in Krakow

2019 ◽  
Vol 63 (1) ◽  
pp. 77-86 ◽  
Author(s):  
Bogusław Podhalański ◽  
Anna Połtowicz
Keyword(s):  
Twentieth Century ◽  
Cultural Heritage ◽  
Steel Structure ◽  
City Block ◽  
Raising Awareness ◽  
Straight Line ◽  
Heritage Buildings ◽  
Heritage Building ◽  
Historic City ◽  
The City

Abstract The article discusses a project that features the relocation of the historic Atelier building, built by Krakow-based architect Wandalin Beringer (1839–1923) who was active in the early twentieth century, and the regeneration of a plot belonging to the Congregation of the Resurrection since 1885, which is located at 12 Łobzowska Street in Krakow. The method includes cutting the entire structure off at the foundation and then after reinforcing it with a steel structure transporting it in its entirety to the new location. The project included two possible variants of moving the building in a straight line, either by 21 or 59 metres and evaluates two projects of further regeneration, the adaptive reuse of the building as an exhibition and religious space as well as a proposal for the remodelling of the nearby plot that belongs to the Congregation into a space for meditation and as a recreational park. The aim of these measures is to prevent the demolition of this building, now over a century old, as a result of which a forgotten element of the cultural heritage of the city will be saved. This project was based on the results of analyses of the cultural and historical conditions of Krakow. The block of buildings in which the Atelier in question is located is a very attractive location, near to the very centre of Krakow, adjacent to residential, service and educational buildings. It is directly adjacent to the Monastery Complex of the Congregation of the Resurrection, listed as a heritage building under conservation protection (municipal registry of heritage buildings). In the second half of the twentieth century, the building was used as a workroom by artists such as Xawery Dunikowski and later by the sculptress Teodora Stasiak. The case of the Atelier may provide an inspiration for discussion as well as raising awareness among citizens and city authorities to avoid future situations in which cultural heritage may become forgotten or demolished.

Comparison of Interstorey Drift in General RC Buildings in Pounding and No Pounding Case

2020 ◽  
Vol 2 (1) ◽  
pp. 40-47
Author(s):  
Anand Dev Bhatt
Keyword(s):  
Seismic Analysis ◽  
Linear Time ◽  
Time History ◽  
Case Analysis ◽  
Rc Buildings ◽  
Adjacent Buildings ◽  
Sufficient Distance ◽  
Earthquake Load ◽  
Interstorey Drift ◽  
Lower Height

 Inter-storey drift is an important parameter of structural behavior in seismic analysis of buildings. Pounding effect in building simply means collision between adjacent buildings due to earthquake load caused by out of phase vibration of adjacent buildings. There is variation in inter-storey drift of adjacent buildings during pounding case and no pounding case. The main objective of this research was to compare the inter-storey drift of general adjacent RC buildings in pounding and no pounding case. For this study two adjacent RC buildings having same number of stories have been considered. For pounding case analysis there is no gap in between adjacent buildings and for no pounding case analysis there is sufficient distance between adjacent buildings. The model consists of adjacent buildings having 4 and 4 stories but unequal storey height. Both the buildings have same material & sectional properties. Fast non-linear time history analysis was performed by using El-centro earthquake data as ground motion. Adjacent buildings having different overall height were modelled in SAP 2000 v 15 using gap element for pounding case. Finally, analysis was done and inter-storey drift was compared. It was found that in higher building inter-storey drift is greater in no pounding case than in pounding case but in adjacent lower height building the result was reversed. Additionally, it was found that in general residential RC buildings maximum inter-storey drift occurs in 2nd floor.

Design of a Remarkable Bascule Bridge Over an Historical Canal

2019 ◽  
Author(s):  
Benoit Cusson ◽  
Tony Mailhot
Keyword(s):  
Steel Structure ◽  
City Centre ◽  
Critical Infrastructures ◽  
Historic Site ◽  
The World ◽  
Hydraulic Cylinders ◽  
The City ◽  
Movable Bridge

<p>The Gouin bascule bridge is a 1,300 tons gigantic steel structure that allows pleasure boats to enter the Chambly Canal National Historic Site and provides access over the Richelieu river for vehicles, cyclists and pedestrians. As part of a project to revitalize and modernize the city centre, the architectural concept of the movable bridge will provide a landmark to this highly touristic site. There are only few examples in the world of such movable bridges with a large suspended counterweight. The challenges of the project include strict architectural criteria, fabrication and alignment of over 800 mm in diameter pins, the assembly on-site of remarkably large bridge parts and the precise balancing of the bridge.</p><p>When designing this structure, WSP made sure to consider the non-redundant aspect of some parts of the structure. Details regarding the design of the stays supporting the entire upper structure and the hydraulic cylinders initiating the rotation are described in this paper. The planning of the works in the middle of the critical infrastructures and services surrounding the bridge is explained. Since no interruption of the navigation on the canal was allowed during construction, some special considerations had to be taken with regards to the works at the foundation units.</p>

scholarly journals Earthquake Resistant Residential Neighborhood in China: Examination of vulnerability in outdoor spaces

2018 ◽  
Vol 3 (7) ◽  
pp. 59-69
Author(s):  
Xue Ma ◽  
Ryuzo Ohno
Keyword(s):  
Publishing House ◽  
Disaster Mitigation ◽  
Target Area ◽  
Earthquake Disaster ◽  
Residential Neighborhood ◽  
Outdoor Spaces ◽  
Earthquake Resistant ◽  
International Publishing ◽  
The City ◽  
Open Access Article

China is a seismic active country. We suffered a large number of fatalities by earthquake damage. A great deal of requirements on disaster mitigation has been putting forward and which is becoming a hot topic in the society. This paper focuses on the safety situation of residential environment in Chinese cities, tries to examine the vulnerabilities for earthquake disaster mitigation. We chose the city of Tianjin as target area applying for the detail analysis. An evaluation was interpreted into suggestions and advices on planning and management. Keywords: Vulnerability, Earthquake disaster mitigation, Residential area eISSN 2514-751X © 2018. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open-access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia.

scholarly journals USED TIRE AS BASE ISOLATOR TIRE FOR EARTHQUAKE RESISTANT HOUSES

2011 ◽  
Vol 7 (1) ◽  
pp. 37
Author(s):  
Inggemar Särfors
Keyword(s):  
Base Isolation ◽  
Load Ratio ◽  
Earthquake Resistance ◽  
Horizontal Load ◽  
Hydraulic Jack ◽  
Earthquake Energy ◽  
Base Isolator ◽  
Earthquake Resistant ◽  
Earthquake Load ◽  
Better Than

The investigation of foundation on tires for absorbing the earthquake energy on houses structure is described here. The foundations are cut cone in shape. There are two tests have been conducted to investigate the shaking energy absorption. First, the foundation is placed on the sand filled tire. The second one, the double tires support round foundation. For comparison purpose, the foundation on sand test without tire is also conducted. The laboratory tests are performed using double hydraulic jack to generate the applied loads. The first jack is used to give the vertical load on the top of foundation to simulate the house load. The other jack is used to produce the load in the horizontal direction to replicate the earthquake load. The results of the tests are plotted in the terms of horizontal load and displacement corves. The double tires foundation shows the higher horizontal displacement-load ratio compared to the others. It indicates that the double tire based foundation absorbing the earthquake energy better than the others. It is concluded that the tired based foundation can be installed to support in the earthquake resistant houses. Keywords: foundation, earthquake resistance, base isolation

Studies on the Bidirectional Exciting Control for the Seismic Analysis of the Soil Mechanics

2010 ◽  
Vol 439-440 ◽  
pp. 811-817
Author(s):  
Yong Sang ◽  
Long Tan Shao
Keyword(s):  
High Speed ◽  
Seismic Analysis ◽  
Amplitude Ratio ◽  
Soil Mechanics ◽  
Water Pressure ◽  
Geotechnical Engineering ◽  
Servo Systems ◽  
Response Characteristics ◽  
Earthquake Load ◽  
Hydraulic Servo

According to the seismic analysis of the soil mechanics for the major and complex geotechnical engineering projects such as highway, high-speed railway, subway, dams and so on, there is acute lack testing instrument considering the level earthquake load and the vertical earthquake load. In order to resolve this problem a new design plan is putted forward in this paper, which can generate bidirectional exciting force with designed amplitude ratio, phase and waveform. The radial exciting subsystem (water pressure) and the axial exciting subsystem (force) are both built by the hydraulic servo systems. The two subsystems have excellent dynamic response characteristics. Several key technical issues existing in bidirectional exciting control have been discussed in detail such as: (1) high-precision unconventional bidirectional exciting control strategy; (2) decoupling control methods in the bidirectional exciting process; (3) real-time compensation by using digital image technology. The instrument will provide advanced test conditions for the complex geotechnical engineering.

scholarly journals Real Cyclic Load-Bearing Test of a Ceramic-Reinforced Slab

2020 ◽  
Vol 10 (5) ◽  
pp. 1763
Author(s):  
Albert Albareda-Valls ◽  
Alicia Rivera-Rogel ◽  
Ignacio Costales-Calvo ◽  
David García-Carrera
Keyword(s):  
Cyclic Load ◽  
Structural Response ◽  
Steel Structure ◽  
Steel Beams ◽  
Load Bearing ◽  
Rc Frames ◽  
Industrial Buildings ◽  
Loading And Unloading ◽  
Low Levels ◽  
The City

Ceramic-reinforced slabs were widely used in Spain during the second half of the 20th century, especially for industrial buildings. This solution was popular due to the lack of materials at that time, as it requires almost no concrete and low ratios of reinforcement. In this study, we present and discuss the results of a real load-bearing test of a real ceramic-reinforced slab, which was loaded and reloaded cyclically for a duration of one week in order to describe any damage under a high-demand loading series. Due to the design of these slabs, the structural response is based more on shear than on bending due to the low levels of concrete and the geometry and location of re-bars. The low ratio of concrete makes these slabs ideal for short-span structures, mainly combined with steel or RC frames. The slab which was analyzed in this study covers a span of 4.88 m between two steel I-beams (IPN400), and corresponds to a building from the mid-1960s in the city of Igualada (Barcelona, Spain). A load-bearing test was carried out up to 7.50 kN/m2 by using two-story sacks full of sand. The supporting steel beams were propped up in order to avoid any interference in the results of the test; without the shoring of the steel structure, deflections would come from the combination of the ceramic slab together with the steel profiles. A process of loading and unloading was repeated for a duration of six days in order to describe the cyclic response of the slab under high levels of loading. Finally, vibration analysis of the slab was also done; the higher the load applied, the higher the fundamental frequency of the cross section, which is more comfortable in terms of serviceability.

The Longitudinal Seismic Analysis of Single-Story and Single-Span Gabled Frame Structures

2015 ◽  
Vol 744-746 ◽  
pp. 335-339
Author(s):  
Hong Dong Ran ◽  
Le Chen ◽  
Yun Mei Ma
Keyword(s):  
Seismic Analysis ◽  
Time History ◽  
Steel Structure ◽  
National Standard ◽  
Nonlinear Time History Analysis ◽  
Frame Structures ◽  
Seismic Action ◽  
Light Weight ◽  
Standard Design ◽  
Nonlinear Time History

Four single-story single-span Gabled Frame Structures (GFSs) which included in China national Standard Design Drawing of Light-weight Steel Structure with Gabled Frame (02SG518-1) were studied and their longitudinal seismic performances were evaluated through extensive nonlinear time-history analysis using eight ground motions representing the Frequent Earthquake, DBE and the MCE hazard levels, the load-bearing performances, deformation capacities and the curves of displacement were studied. The analysis results showed that the longitudinal seismic action of all GFSs considered in this study is very little, the displacement at the top of the column can satisfy the demands of the Technical Specificationfor Steel Structure of Light-weight Building with Gabled Frames even in MCE. The GFSs designed followed the Specificaiton have the excellent longitudinal seismic performance.

Tsunami and Seismic Damage Caused by the Earthquake Off Iquique, Chile, in April, 2014

2016 ◽  
Vol 10 (02) ◽  
pp. 1640003 ◽  
Author(s):  
Takashi Tomita ◽  
Kentaro Kumagai ◽  
Cyril Mokrani ◽  
Rodrigo Cienfuegos ◽  
Hisashi Matsui
Keyword(s):  
Seismic Damage ◽  
South American ◽  
Nazca Plate ◽  
South American Plate ◽  
Straight Line ◽  
Earthquake Resistant ◽  
Straight Line Distance ◽  
Run Up ◽  
Tsunami Run Up ◽  
The City

On Tuesday, April 1, 2014, at 8:46 p.m. local time in Chile, a subduction earthquake of Mw 8.2 occurred about 100[Formula: see text]km northwest of the city of Iquique, where the Nazca plate subducts beneath the South American plate. This earthquake triggered a tsunami, which hit coastal areas in northern Chile. A joint Japan–Chile team conducted a post-tsunami field survey to measure the height of the tsunami traces and to investigate the damage caused by the earthquake and tsunami. Based on measurements of the tsunami traces, it is estimated that a tsunami 3–4[Formula: see text]m in height hit the coast from Arica, which is near the border between Chile and Peru, to Patache, south of Iquique, a straight-line distance of approximately 260[Formula: see text]km. The tsunami caused only minor inundations near shorelines, and caused no damage to buildings because living spaces were higher than the tsunami run-up height. Seismic damage was more extensive than that caused by the tsunami, especially in Iquique, and included the destruction of houses, buildings, and other infrastructure. It also ignited fires. In the Port of Iquique, a wharf, before earthquake-resistant improvements were implemented, was destroyed by the strong ground motions that resulted from the earthquake.

The Quasi-Frame-Shear-Wall Method for Reinforcement of Concrete-Masonry Mixed Structures

2011 ◽  
Vol 368-373 ◽  
pp. 2060-2064
Author(s):  
Ji Tong Jiang ◽  
Wei Liu ◽  
Hong Qiu Guo ◽  
Song Yang ◽  
De Run Du
Keyword(s):  
Seismic Analysis ◽  
Shear Wall ◽  
Wall Structure ◽  
Original Structure ◽  
Transmission Route ◽  
Force Transmission ◽  
Mixed Structure ◽  
Concrete Masonry ◽  
Reinforcement Measures ◽  
Wall Method

Based on seismic analysis of concrete-masonry mixed structure, a new strengthening method will be introduced. In order to find the effective and reasonable reinforcement measures to adjust to the characteristics of the mixed structure, the method of equivalent stiffness should apply to the structure, it can change the original unreasonable force transmission route, and then transform and reinforce the original structure into a quasi-frame-shear wall structure whose force transmission route is similar to frame-shear wall structure. This could be a reference to similar projects.

Sign in / Sign up

Export Citation Format

Share Document