scholarly journals Inspection and Numerical Analysis of an Ottoman Railway Bridge in Jordan

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Amin H. Almasri ◽  
Qusai Fandi Al-Waked
Keyword(s):  
Structural Analysis ◽  
Seismic Analysis ◽  
Construction Materials ◽  
Structural Condition ◽  
Railway Bridge ◽  
Railway Network ◽  
Earthquake Loads ◽  
Natural Factors ◽  
Body Construction ◽  
Stone Material

The construction of bridges represents a big challenge, since they require enormous economic effort and specialized technical skills. Bridges were historically important as they help connecting people and thus diffusing cultures, sharing ideas, and providing the backbone of transportation networks. This study focuses on the inspection and structural analysis of a 20th-century Ottoman railway stone arched bridge located on the Hejaz railway network in Jordan. The bridge has a very important cultural heritage value which stems from its history. The bridge stone material was cut and tested to determine its strength, in order to be used in the analysis. The structural analysis was carried out to assess the structural condition of the bridge and its suitability for reuse. The study includes static analysis under gravity loads and seismic analysis under earthquake loads. Despite the existence of deterioration in the bridge body construction materials due to a combination of human and natural factors, the analysis results proved enough structural capability to sustain the imposed gravity loads, but not a strong earthquake.

scholarly journals ANALISIS GAYA GEMPA PADA BANGUNAN RUMAH TINGGAL DI WILAYAH GEMPA TINGGI

2018 ◽  
Vol 7 (2) ◽  
pp. 57-64
Author(s):  
Alfian Wiranata Zebua
Keyword(s):  
Structural Analysis ◽  
Shear Force ◽  
Structure Model ◽  
Dynamic Shear ◽  
Earthquake Loads ◽  
Story Drift ◽  
Loads Analysis ◽  
Support Reactions ◽  
Static Shear

Abstract : Four stories building was used as structure model. Static earthquake loads distribution were determined according to SNI 1726:2012. The effect of dynamic earthquake loads also considered. The result of structural analysis determined using ETABS. It were static shear force 1.082,64 KN and dynamic shear force, Fx = 1.057 KN and Fy = 983,5 KN. Colomn and beam forces were also determined. Support reactions and joint displacements were determined through structural analysis. Mass modal participation has been reached over 90% at mode 5. Story drift was still smaller than the allowable story drift.Keywords : earthquake loads analysis, residential building.Abstrak:Model struktur yang dianalisis yaitu gedung beraturan lantai 4 untuk rumah tinggal. Distribusi beban gempa statik diperoleh sesuai dengan SNI 1726:2012. Pengaruh beban gempa dinamik juga diperhitungkan. Hasil analisis struktur diperoleh antara lain besaran gaya geser statik 1.082,64 KN dan gaya geser dinamik, Fx = 1.057 KN dan Fy = 983,5 KN. Besaran gaya elemen kolom dan balok juga diperoleh. Reaksi tumpuan serta perpindahan titik buhul dapat diketahui dari hasil analisis yang dilakukan. Pada mode 5, partisipasi massa model yang dianalisis sudah mencapai 90%.Simpangan antar lantai yang terjadi pada model struktur tidak melebihi simpangan yang diijinkan.Kata kunci : analisis gaya gempa, bangunan rumah tinggal.

scholarly journals Structural renovation of residential building in Zagreb after the 22 March 2020 earthquake

2021 ◽  
Vol 73 (06) ◽  
pp. 633-648
Author(s):  
Stjepan Lakusic
Keyword(s):  
Seismic Analysis ◽  
Pushover Analysis ◽  
Residential Building ◽  
Structural Condition ◽  
Static Method ◽  
Seismic Resistance ◽  
Masonry Structures ◽  
Assessment Report ◽  
Nonlinear Static ◽  
Structural Condition Assessment

The phases that must be completed so that a building damaged in earthquake that struck Zagreb on 22 March 2020 can be renovated and strengthened to the required level of seismic resistance are presented in the paper. All phases are therefore presented, starting from the rapid and then detailed inspection, and continuing with preparation of the structural condition assessment report, preparation of renovation design and, finally, ending with realisation of work with expert supervision. A special attention is paid to structural analysis that is conducted using a nonlinear static method based on displacements, the so called pushover analysis, which is considered to be one of the most appropriate methods for seismic analysis of existing masonry structures. All procedures conducted in the scope of this renovation were realised in accordance with legislation that entered into force after the earthquake.

scholarly journals Seismic analysis of high-speed railway irregular bridge–track system considering V-shaped canyon effect

2021 ◽  
Author(s):  
Zhihui Zhu ◽  
Yongjiu Tang ◽  
Zhenning Ba ◽  
Kun Wang ◽  
Wei Gong
Keyword(s):  
Seismic Response ◽  
Earthquake Engineering ◽  
High Speed ◽  
Seismic Analysis ◽  
Ground Motions ◽  
Back Side ◽  
Railway Bridge ◽  
High Speed Railway ◽  
Track System ◽  
Canyon Topography

AbstractTo explore the effect of canyon topography on the seismic response of railway irregular bridge–track system that crosses a V-shaped canyon, seismic ground motions of the horizontal site and V-shaped canyon site were simulated through theoretical analysis with 12 earthquake records selected from the Pacific Earthquake Engineering Research Center (PEER) Strong Ground Motion Database matching the site condition of the bridge. Nonlinear seismic response analyses of an existing 11-span irregular simply supported railway bridge–track system were performed under the simulated spatially varying ground motions. The effects of the V-shaped canyon topography on the peak ground acceleration at bridge foundations and seismic responses of the bridge–track system were analyzed. Comparisons between the results of horizontal and V-shaped canyon sites show that the top relative displacement between adjacent piers at the junction of the incident side and the back side of the V-shaped site is almost two times that of the horizontal site, which also determines the seismic response of the fastener. The maximum displacement of the fastener occurs in the V-shaped canyon site and is 1.4 times larger than that in the horizontal site. Neglecting the effect of V-shaped canyon leads to the inappropriate assessment of the maximum seismic response of the irregular high-speed railway bridge–track system. Moreover, engineers should focus on the girder end to the left or right of the two fasteners within the distance of track seismic damage.

scholarly journals Justification of stone in construction materials bases and covers logging roads

2017 ◽  
Vol 6 (2) ◽  
pp. 84-90
Author(s):  
Кручинин ◽  
Igor Kruchinin
Keyword(s):  
Coordination Number ◽  
Construction Materials ◽  
Contact Forces ◽  
Cyclic Loads ◽  
Stone Materials ◽  
Stone Material ◽  
Logging Roads ◽  
Restraining Force

Justification of stone in construction materials bases and covers logging roads. These changes depending on the strength of stone material particles relative to the coordination number and change the contact forces between the particles when subjected to repeated cyclic loads. It was established that the limestone rubble strength of 400 is much more prone to crushing when the effects of multiple cyclic loads than solid dolomite and granite rub-ble. The increase in the restraining force between the particles due to the weak cementing stone materials ranged from 5 to 30 percent.

scholarly journals The construction materials and static-structural aspects of the Budello tower (Teulada, southwest Sardinia, Italy)

X ◽  
2020 ◽  
Author(s):  
Stefano Columbu ◽  
Gian Matteo F. Picchizzolu ◽  
Antonio Cazzani
Keyword(s):  
Structural Analysis ◽  
Good Condition ◽  
Construction Materials ◽  
Mechanical Analysis ◽  
The Other ◽  
External Diameter ◽  
Trap Door ◽  
Single Room ◽  
Central Pillar ◽  
Structural Aspects

The Budello tower is located on a slight promontory from which it dominates the entire bay of Teulada and the towers of Sant’Isidoro, Pixinni, Malfatano and Porto Scudo. The tower, built in 1601 with irregular ashlars of local stones (mainly of magmatic-intrusive origin), has a truncated cone shape, an external diameter of 10,2 m and a height of 11,80 m. Inside it consists of a single room, with a domed vault and a central pillar, equipped with a embrasure, a fireplace, a trap door in the cistern, and a staircase, from which the square of arms was accessed. It was a torre de armas garrisoned by: 1 commander (in 1603), 1 artilleryman and 4 soldiers (1767), 1 artilleryman and 3 soldiers (1801), 1 artilleryman and 4 soldiers (1812). Although it underwent several restorations, documented as early as the years 1617-1619, the tower remained generally in good condition until the period 1763-1784, in which new restoration works were carried out including the closure of the parade ground with a classic parapet with gunboats and battlements. Other restoration works are carried out in 1808, 1819 and 1840. The tower remained in operation until 1843. Like all the other coastal fortifications, it was then definitively demilitarized with the Regio Decreto of 25 April 1867. Specific objectives of the research are the petrographic and physical-mechanical analysis of the stones and ancient mortars used in the construction of the tower, the structural analysis of the building and related geometric-constructive characteristics. The final intention is to understand the decay processes taking place on the tower both in terms of materials and static-structural aspects, and to envisage possible restoration interventions to be implemented aimed at its conservation.

EVALUASI KINERJA DAN PERBAIKAN STRUKTUR BETON GEDUNG PENDINGIN AIR = EVALUATION ON THE PERFORMANCE OF AND REPAIR OF THE CONCRETE STRUCTURE OF A COOLING WATER TOWER

2019 ◽  
Vol 13 (1) ◽  
pp. 9
Author(s):  
Hendro Ahmad Fauzi
Keyword(s):  
Structural Analysis ◽  
Cooling Water ◽  
Structural Performance ◽  
Structural Element ◽  
Design Strength ◽  
Earthquake Loads ◽  
Evaluation Of Performance ◽  
Quality Testing ◽  
Structure Strength ◽  
Safe Condition

This paper presents the evaluation of performance and strenght ofstructure by visual inspection and quality testing of concrete in the field by using aSchmidt hammer and UPV. The evaluation on the performance of the structure,strength columns, beams and plates refer to SNI-2847-2002, in which theimplementation of earthquake loads was based on SNI-1726-2002.The paperproposes improvements and retrofitting necessary structures. SAP2000 is usedfor structural analysis necessary to obtain the required strength values (Ru).Beton2000 is used for structural analysis of existing conditions in order to get thedesigned strength values (Rn). The structure components are in safe condition ifits design strength is greater or equal than required strength or (Ø.Rn) ≥ Ru.Improvements were made to the structural element by coating and injectionmethods.Keywords : structural performance evaluation, improvement AbstrakMakalah ini menyajikan evaluasi kinerja dan kekuatan struktur denganmetode pemeriksaan secara visual dan pengujian mutu beton di lapangandengan alat Schmidt hammer dan UPV. Evaluasi kinerja struktur, kekuatankolom, balok serta pelat mengacu pada SNI-2847-2002, dengan penerapanbeban gempa berdasarkan SNI-1726-2002, serta memberikan usulan perbaikandan perkuatan struktur yang diperlukan. SAP 2000 digunakan untuk analisisstruktur guna mendapatkan nilai kuat perlu (Ru). Beton 2000 digunakan untukanalisis struktur kondisi existing guna mendapatkan kuat rencana (Rn).Komponen struktur dikatakan aman jika kuat rencana lebih besar atau samadengan kuat rencana atau (ф . Rn) ≥ Ru. Perbaikan elemen struktur dilakukandengan metode coating dan injeksi..Kata kunci : evaluasi kinerja struktur, metode perbaikan

scholarly journals Documentation, structural health monitoring and numerical modelling for damage assessment of the Morris Island Lighthouse

2019 ◽  
Vol 377 (2155) ◽  
pp. 20190002 ◽  
Author(s):  
Anna Blyth ◽  
Rebecca Napolitano ◽  
Branko Glisic
Keyword(s):  
South Carolina ◽  
Structural Analysis ◽  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Structural Damage ◽  
Distinct Element ◽  
Structural Condition ◽  
Present Condition ◽  
Cultural Significance ◽  
Structural Health

Heritage structures serve as invaluable records of cultural achievement that should be preserved for future generations. To ensure the successful preservation of these structures, there must be an affordable and effective way to conduct conservation. The objective of this work is to outline an efficient workflow for the structural analysis of preservation projects through a case study on the Morris Island Lighthouse in Charleston, South Carolina. Thorough documentation of the cultural significance and structural condition of the lighthouse was completed through archival research, photogrammetry and crack mapping. Structural Health Monitoring and Distinct Element Modelling were used to analyse past structural damage and the present condition. The behaviour of masonry and crack propagation was evaluated under gravity, wind, wave and seismic loading. The results of these analyses were summarized in a virtual tour and informational modelling environment, which allows the results to be accessed and associated with their physical location on the structure. The benefits and limitations of this process are discussed, and a standardized workflow for efficient structural analysis of cultural heritage is proposed. This article is part of the theme issue ‘Environmental loading of heritage structures’.

“Exact” Three-Dimensional Linear and Nonlinear Seismic Analysis of Structures with Two-Dimensional Models

2003 ◽  
Vol 19 (4) ◽  
pp. 897-912 ◽  
Author(s):  
Michael Mehrain ◽  
Farzad Naeim
Keyword(s):  
Structural Analysis ◽  
Nonlinear Analysis ◽  
Seismic Analysis ◽  
Three Dimensional ◽  
Modeling Technique ◽  
Two Dimensional ◽  
Single Model ◽  
Relative Ease ◽  
Conventional Analysis ◽  
Linear And Nonlinear

This paper presents a modeling technique by which a complete three-dimensional (3-D) structural analysis of a structure can be performed using two-dimensional (2-D) models, and hence 2-D software. The approach includes the effect of torsion, walls perpendicular and inclined to the direction of motion as well as walls with L, T, and H shapes in plan. Diaphragm displacements are easily modeled. The method can be used with linear and nonlinear analysis. Nonlinearity in the diaphragms can also be modeled with relative ease. Furthermore, unlike the conventional analysis that requires two 2-D models, one in each direction of motion, to model the 3-D structure, this approach requires only a single model.

Sign in / Sign up

Export Citation Format

Share Document