EngRN: Structural Engineering (Topic)最新文献

Analysis of Retrofitting Technique of Deficient Foundation by Underpinning by Micropiling: A Critical Review 微桩支护加固缺陷地基技术分析

EngRN: Structural Engineering (Topic) Pub Date : 2021-01-07 DOI: 10.2139/ssrn.3761563

Saswati Sahoo, S. Satapathy

{"title":"Analysis of Retrofitting Technique of Deficient Foundation by Underpinning by Micropiling: A Critical Review","authors":"Saswati Sahoo, S. Satapathy","doi":"10.2139/ssrn.3761563","DOIUrl":"https://doi.org/10.2139/ssrn.3761563","url":null,"abstract":"Foundation is an important structural member of a building as it transfers all the structural loads to the ground safely and uniformly so that no stress concentration will occur anywhere in the building. So the foundation of the structure should be designed properly as per the codal provision and maintained according to the structural modification. But when the structural modification occurs in the form of extension of the building horizontally or vertically it becomes necessary to modify the foundation due to the additional load. But some people don’t consider the foundation as a structural element and hence they don’t modify the foundation according to the modified structural requirement. It results in the deficiency of foundation in the terms of reduction of bearing capacity and settlement of foundation. For these deficient foundations retrofitting is needed so that the deficiency can be minimized. \u0000 \u0000In this work the case of vertical storey extension has been taken and deficiency of foundation has been calculated. A retrofitting technique has been discussed which can be applied for the deficient foundation i.e Underpinning by Micropiling. \u0000 \u0000This technique has been applied on the foundation and hence retrofit effectiveness of the technique has been assessed.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123893256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parameters of Pre-Stressed Box Girder Bridge under Different Radius of Curvature 不同曲率半径下预应力箱梁桥参数

EngRN: Structural Engineering (Topic) Pub Date : 2020-09-01 DOI: 10.2139/ssrn.3741371

Dr Rajan Suwal, D. Sharma

{"title":"Parameters of Pre-Stressed Box Girder Bridge under Different Radius of Curvature","authors":"Dr Rajan Suwal, D. Sharma","doi":"10.2139/ssrn.3741371","DOIUrl":"https://doi.org/10.2139/ssrn.3741371","url":null,"abstract":"This research, it is primarily intended to assess parametric study of pre-stressed Box-Girder bridges. Radius of Curvature was varied in 50m span bridge in horizontal direction only. All the models are subjected to self-weight and moving load of IRC class 70R vehicle [3]. For this research, a three dimensional finite element (FE) model of two lane simply supported Box Girder Bridge made up of pre-stressed concrete has been developed using commercial software SAP 2000 version 14.0. Modal analysis has been carried out to obtain the mode shapes and various vibration properties such as fundamental time period and frequencies. For acceleration time history analysis Gorkha Earthquake has been used. From modal analysis the longitudinal stress at top and bottom of cross sections, bending moment, torsion, deflection and fundamental frequency are calculated. The responses of a curved bridges in comparison straight bridge are recorded. The ratio of responses is represented by a parameter. From the responses linear equation has been generated for torsion, bending moment, and deflection. Increase in Bending Moment, Torsion, deflection and stresses due to curvature can be represented by multiplication factor, ratio of maximum response of curved bridge to that of straight bridge from moving load analysis, within reasonable accuracy which can be used in preliminary design.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121981635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal State of Steel Structures With a Combined Fire Protection System Under Conditions of Fire Exposure 火灾条件下钢结构组合防火系统的热态分析

EngRN: Structural Engineering (Topic) Pub Date : 2020-06-30 DOI: 10.15587/1729-4061.2020.206373

S. Novak, V. Drizhd, O. Dobrostan

{"title":"Thermal State of Steel Structures With a Combined Fire Protection System Under Conditions of Fire Exposure","authors":"S. Novak, V. Drizhd, O. Dobrostan","doi":"10.15587/1729-4061.2020.206373","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.206373","url":null,"abstract":"Given the need to minimize the weight-dimensional indicators of steel structures, the issue of the effective use of a combined fire protection system is relevant. The article deals with the thermal state of steel structures with such a system of fire protection under conditions of fire exposure in the standard temperature mode according to DSTU B V. 1.1-4-98*. The experimental samples used square steel plates with a side of 500 mm and a thickness of 5 mm and 10 mm. The conducted research revealed the peculiarities of dependences of the temperatures of steel structures with passive and reactive fire-retardant materials of two brands on the duration of fire exposure. It was established that these dependences for steel structures with combined, passive, and reactive fire protection systems have a monotonously growing character. The maximum values of the duration of fire exposure are typical of the experimental samples that have the steel plate of the thickness of 10 mm, for a critical temperature of steel of 600 °C. They are 111 min, 101 min, 55 minutes, respectively, for the combined, passive, and reactive fire protection systems. It was established that a combined fire protection system is characterized by an increase in the duration of reaching the critical temperature of steel in comparison with passive and reactive fire protection systems. This is due to the effective combination of physical and chemical properties of passive and reactive fire-retardant materials. For the duration of fire exposure up to 79 min, the value of the duration of reaching the critical temperature of steel for a combined fire protection system exceeds the sum of durations of its achievement, which are typical for passive and reactive fire protection systems. This indicates the effectiveness of a combined system in this range of fire exposure duration. At an increase in the duration of fire exposure, the effectiveness of a combined fire protection system decreases.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116847676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Strength Assessment and Restoration of RC Structures by Structural Health Monitoring Techniques 基于结构健康监测技术的钢筋混凝土结构强度评估与修复

EngRN: Structural Engineering (Topic) Pub Date : 2020-04-10 DOI: 10.35337/ejasr.2020.v02i04.005

G. Buvanesan, P. Haritha, A. Karthikeyan, K. Vidhya, R. Manirasu

{"title":"Strength Assessment and Restoration of RC Structures by Structural Health Monitoring Techniques","authors":"G. Buvanesan, P. Haritha, A. Karthikeyan, K. Vidhya, R. Manirasu","doi":"10.35337/ejasr.2020.v02i04.005","DOIUrl":"https://doi.org/10.35337/ejasr.2020.v02i04.005","url":null,"abstract":"Fundamentally, concrete is extensively used as structure material because of the truth of its over the top quality cost extent in various applications. Significant improvements usually are foreseen to deftly inconvenience-free providers over the range of its inferred arrangement life. Regardless, these wants are not perceived in multiple revisions given the truth of assistant insufficiency, material rot, unanticipated loadings or physical wickedness, and subsequently, Civil structures like structures, dams, ranges, etc. are presented to steady deterioration all through the long haul. This level of damage or disintegrating depends on the unimaginable substances and artistry at each the structure stage. The breaking down of advancements can be a last result of the extent of factors far-reaching radiator hurt, ice movement, substance attack, utilization of steel, etc. at some stage in the structure's lifestyle scope. The adequacy assessment is consequently essential for finding the construction's contemporary convenience and its expansion for future developments or alterations in its utilization. Such an evaluation can be finished using the methodologies: a) Visual evaluation, b) Non-Destructive Testing c) Partial Destructive Testing. Also, it changes into essential for structures hit with the guide of a seismic quake, a bomb sway, or any exceptional calamity. All around, Soundness evaluation to be executed for improvements which are navigated 15 years of age.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122361630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Study of Beam Connection with Diagonal Models 对角模型梁连接的研究

EngRN: Structural Engineering (Topic) Pub Date : 2020-02-07 DOI: 10.34218/ijciet.11.1.2020.017

Masdiana Masdiana, Siti Nurjanah Ahmad, Mrs. Sulha, M. T. Azikin, Ahmad Syarif Sukri

引用次数: 0

Designing of Parabolic Trough Solar Concentrator Using Structural Steel 结构钢抛物面槽太阳能聚光器的设计

EngRN: Structural Engineering (Topic) Pub Date : 2019-12-22 DOI: 10.2139/ssrn.3526697

D. Biswas, V. Dalvi, S. Deshmukh, S. Panse, J. Joshi

引用次数: 2

ANN-based Shear Capacity of Steel Fiber-Reinforced Concrete Beams Without Stirrups 基于人工神经网络的无箍筋钢纤维混凝土梁抗剪承载力研究

EngRN: Structural Engineering (Topic) Pub Date : 2019-09-01 DOI: 10.2139/ssrn.3457585

M. Abambres, E. Lantsoght

引用次数: 23

Performance Assessment of RC Columns Subjected to Non-Uniform Fire Exposure 非均匀火灾作用下RC柱的性能评估

EngRN: Structural Engineering (Topic) Pub Date : 2019-02-22 DOI: 10.2139/ssrn.3368026

Anand Chatter, Ratnesh Kumar

{"title":"Performance Assessment of RC Columns Subjected to Non-Uniform Fire Exposure","authors":"Anand Chatter, Ratnesh Kumar","doi":"10.2139/ssrn.3368026","DOIUrl":"https://doi.org/10.2139/ssrn.3368026","url":null,"abstract":"Fire in buildings is one of the most destructive accidental loads that may occur during its design lifetime which can significant loss of life and property. Past building fire incidents indicated the necessity of incorporation of its effect in structural design approaches. Currently, the fire design of RC columns is based on the prescriptive method suggested in National Building Code (NBC) 2016 and IS 456: 2000 which only provides minimum dimensions and cover values for various fire durations with an assumption that all column faces will be subjected to fire exposure simultaneously. However, in realistic scenarios the columns may be subjected to non-uniform/uniform fire scenarios viz. 1-, 2-, 3-face fire exposures are non-uniform and all 4 face fire exposures is uniform, depending on their location in building and location of fire. As the modern design approaches are moving towards the performance based design, the assumption of uniform fire case does not holds good. This paper presents a comparative study of column capacities subjected to non-uniform fire exposures computed using Tan and Yao method and compares with column capacities computed by zoning method of Eurocode-2. In this study a set of columns of an existing educational building with different fire exposure conditions are considered. The collapse load for those columns is determined by both Eurocode-2 method which considers uniform fire case and Tan and Yao method which considers non-uniform case. The variation in their collapse loads from both methods is shown. The study also provides the actual fire rating of columns subjected to non-uniform fires which is an aspect of public fire safety in buildings.","PeriodicalId":356754,"journal":{"name":"EngRN: Structural Engineering (Topic)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131312060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

To Analyse Effect of Various Parameters on Pipe While Bending 分析了各种参数对管材弯曲过程的影响

EngRN: Structural Engineering (Topic) Pub Date : 2018-12-13 DOI: 10.2139/ssrn.3349071

Shivani S. Shahane, Nikita S. Rasate, Dhanashree D. Rane, Ramesh V. Bhandare

引用次数: 0

Dynamic Response of Functionally Graded Fractionally Damped Simply Supported Beam Subjected to Moving Mass 运动质量作用下功能梯度分数阻尼简支梁的动力响应

EngRN: Structural Engineering (Topic) Pub Date : 2018-07-01 DOI: 10.2139/ssrn.3274036

Amro A. Almbaidin, Ibrahim M. Abu-Alshaikh

引用次数: 0