Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2最新文献

{"title":"Finite Element Parametric Studies on Buckling Restrained Brace","authors":"P. S., S. S., N. Madhekar, A. F. Ghowsi","doi":"10.38208/acp.v1.565","DOIUrl":"https://doi.org/10.38208/acp.v1.565","url":null,"abstract":"Concentric Braced Frame (CBF) is an efficient lateral load resisting system. It adds stiffness and strength to the structural system. However, the repeated failures of concentric braces in the past earthquakes has raised concern of its overall seismic performance and ultimate deformation capacity. Buckling Restrained Brace (BRB) is becoming popular energy dissipation device in the field of seismic resistant steel structures. BRB absorbs substantial amount of energy during cyclic performance. By preventing the buckling of the brace, a symmetric and stable hysteresis curve of BRB is achieved, as it dissipates high amount of energy in every single cycle. In the present research work, numerical modelling, and prediction of cyclic response of concrete BRB is presented. The numerical model is validated by comparing the results with the previous experimental work. Numerical simulations have been performed using the finite element software ABAQUS. The yielding core length is varied from 1m to 3 m, and the coefficient of friction is varied from 0 to 1. The parametric study is carried out to investigate the influence of yielding core length and coefficient of friction on the hysteretic performance of concrete BRB. The performance of all the numerical models is accessed by comparing their hysteretic response and the compression adjustment factor. With increasing the friction coefficient between the steel core and the concrete, an unsymmetrical hysteretic response is observed, with reduction in energy dissipation. Axial stiffness of short length BRB is found to be higher, as compared to the longer length. From the parametric study, it is revealed that the length of the yielding core and friction impact the cyclic response of BRBs","PeriodicalId":224851,"journal":{"name":"Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115387617","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}

{"title":"Critical Analysis of the Chenab Bridge, India","authors":"P. Haldar, S. Roy, S. Karmakar","doi":"10.38208/acp.v1.547","DOIUrl":"https://doi.org/10.38208/acp.v1.547","url":null,"abstract":"Chenab river is one of the big rivers in Northern India. Indian Railways has undertaken to make a bridge in the state of Jammu and Kashmir (JandK) over the Chenab river. This bridge is one of the perfect examples of steel and concrete arch bridge, which is in under construction at the height of 320m above the river. This construction has announced as National Project. According to the plan, after completion, the bridge can be declared as the World’s highest rail bridge. Its steel arch main span is 467m long, which is the main key feature of the bridge. This bridge is aim to complete within December 2021. This paper provides an informative review and critical analysis along with conceptual design, the problem faced during the construction of the bridge.","PeriodicalId":224851,"journal":{"name":"Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2","volume":"33 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120934218","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}

{"title":"Numerical Modelling of an Exterior RC Beam Column Joint Subjected to Cyclic Loading Strengthened Using UHPFRC and CFRP","authors":"Q. Fayaz, G. Kaur, P. Bansal","doi":"10.38208/acp.v1.599","DOIUrl":"https://doi.org/10.38208/acp.v1.599","url":null,"abstract":"A poorly detailed reinforced concrete (RC) beam-column joint (BCJ) is highly susceptible to damage under seismic forces due to the generation of shear stresses. Shear stresses are generated due to the continuous change in the direction of the compression and tension forces acting on the beam-column joint. As a result, the strength, stiffness and the energy dissipation of the whole structure is affected. It needs to be addressed beforehand by improving its shear, tensile and energy dissipation capacities so that the damage is minimised. So a structure needs to be strengthened prior to any major damage. In the present study the seismic performance assessment of a BCJ strengthened by a combination of ultra-high performance fibre reinforced concrete (UHPFRC) and carbon fibre reinforced polymer (CFRP) has been done analytically in ABAQUS. The seismic parameters observed are the hysteresis response, strength, stiffness, ductility and energy dissipation of the specimens strengthened both by UHPFRC and CFRP. From the results it is clear that the combination of the two strengthening schemes is very efficient in increasing the peak load 2.62 times and the ductility by almost 6% of the specimens as compared to the specimens strengthened using only one scheme. Also the energy dissipation shows an increase of 7.3% in case of using the combination strengthening strategy. The rate of degradation of the strength is also reduced substantially.","PeriodicalId":224851,"journal":{"name":"Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124886416","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}

{"title":"Seismic Analysis of Flat Slab Buildings on Hilly Ground","authors":"Aparna Singh, S. Tolani, S. D. Bharti, T. K. Datta","doi":"10.38208/acp.v1.580","DOIUrl":"https://doi.org/10.38208/acp.v1.580","url":null,"abstract":"In India, hilly region especially northern part is more seismically active region. Flat Slab systems are widely popular in multi-storey buildings. Flat slab building has more advantages than a regular building like fast construction, free design space, reduced floor to floor height and economical. Flat slab buildings are also being built in high seismicity region. Buildings on hilly ground are vulnerable due to their vertical and horizontal irregularity and they undergo high shear and torsion during the earthquake. Further due to short column and soft storey on uphill side has higher lateral forces that are cause to failure of buildings. In this paper, an attempt has been made to assess the seismic behavior of flat slab resting on hilly slope with soft storey and set back configuration. The methodologies have been adopted are linear dynamic analysis i.e. response spectrum analysis. Building is analyzed and designed by Etabs software. Maximum displacement, maximum inter-storey drift and storey shear are determined as response quantities. It is observed from the study that for flat slab buildings on hill slopes the storey shear is very high in the bottom columns at higher ground level, therefore extra care should be taken to design these columns for earthquake load.","PeriodicalId":224851,"journal":{"name":"Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125027366","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}

{"title":"A Parametric Study on Effect of Wave Height, Water Depth and Support Conditions on Behaviour of Offshore Jacket Structure","authors":"S. George, A. K. Verma, B.R. Dalwadi, Kannan K. R. Iyer","doi":"10.38208/acp.v1.715","DOIUrl":"https://doi.org/10.38208/acp.v1.715","url":null,"abstract":"Fixed offshore jacket structures are constructed for facilitating oil/gas exploration and production. These structures and their foundations are designed to resist large vertical and lateral loads. Various factors including water depth, wave height and support conditions would affect the response of jacket structures. However, few studies have focused on understanding the response of offshore jacket structure due to variation in these factors. In this context, the present work evaluates response of typical X-braced, square base, 4-legged battered jacket structure using STAAD Pro. under combined vertical and lateral environmental loading. The variables included are water depth (60 m, 90 m and 120 m), wave height (5 m, 10 m and 15 m) and two foundation modelling approaches (viz., fixed at pile location and with defined pile stiffness). The connection between structure leg and pile location is modelled to simulate realistic connection. Deck loads, wind forces and current velocities are considered constant for this study. The wind and wave loads have been applied in parallel, perpendicular and diagonal directions with respect to jacket structure. The wave forces are calculated by Morrison’s equation. For obtaining pile stiffness, medium dense sand layer is considered as foundation soil. The increase in water depth and wave height results in corresponding linear increase in lateral deflection and support reactions, the effect of water depth being more prominent. Moreover, lateral and vertical deflection, shear force and bending moment in the legs, the axial forces in the lower tie beams and plan bracings, and support moments are observed to increase when pile locations are modelled with appropriate vertical, lateral and rotational stiffness instead of fixed support. The effect of water depth on member forces is higher as compared to wave height. The present work deliberates on the mechanisms/reasons to explain the observed results and contributes in direction of framing decision matrix for design optimization of jacket structures.","PeriodicalId":224851,"journal":{"name":"Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125881585","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}

{"title":"Finite Element Free Vibration Analysis of Clamped Functionally Graded Plate","authors":"Debalina Dutta, Sreyashi Das","doi":"10.38208/acp.v1.468","DOIUrl":"https://doi.org/10.38208/acp.v1.468","url":null,"abstract":"The main objective of this research is to present analytical solutions for free vibration analysis of moderately thick plates composed of functionally graded materials. Finite element analysis using first-order shear deformation plate theory (FSDT) has been used in the research. Nine noded-isoparametric lagrangian plate bending elements are used in the analysis. Young’s modulus and density per unit volume are assumed to vary continuously through the plate thickness according to power-law distribution. The results have been validated with the existing literature available from other analytical and numerical techniques. The effect of different plate parameters such as aspect ratios, thickness to length ratios, and gradient indices on the natural frequencies of FG rectangular plates is presented. Only clamped boundary conditions have been investigated. It is found that the frequency parameter depends considerably on the said parameters.","PeriodicalId":224851,"journal":{"name":"Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123563416","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}

{"title":"Effect of Shape and Size of Openings in Shear Walls on Lateral Deformations in Shear Walled Framed Structures","authors":"M. Kumar, V. Keshav","doi":"10.38208/acp.v1.600","DOIUrl":"https://doi.org/10.38208/acp.v1.600","url":null,"abstract":"Due to the high density of occupancy of multi-storey structures, structural safety becomes of utmost importance. Shear walls are structural walls which assist the framed structure in resisting lateral forces due to wind and earthquake. Providing the shear walls in multi-storeyed buildings decrease the necessity of providing heavier frames thereby increasing the floor area available in the structure. Generally, openings are provided in shear walls for architectural and functional requirements of the building structure. It is well known that providing openings in shear walls significantly decrease its stiffness and tension/Compression coupling mechanism. Codes of various origins restrict the percentage of openings in shear walls, however, remain silent about the shape of opening. The Finite element analysis has become an essential method of analysis for incorporating the physical entities mathematically. This paper aims to numerically investigate the effect of opening shape and opening size on lateral deformations of a multi-storeyed framed structure. To this end various shapes of openings i.e. triangular, square, and circular are incorporated in the shear wall and for each opening shape 20% and 25% openings have been considered. A ten-storey building containing the shear walls of various configurations has been analysed using the SAP2000 under the seismic load condition and the maximum lateral deformation produced at top storey of buildings are compared.","PeriodicalId":224851,"journal":{"name":"Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123751340","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}

{"title":"Optimal control of structural vibration using LQG algorithm","authors":"P. Chaudhuri, D. Maiti, D. Maity","doi":"10.38208/acp.v1.634","DOIUrl":"https://doi.org/10.38208/acp.v1.634","url":null,"abstract":"This paper proposes a Linear Quadratic Guassian Design (LQG) with based semi-active control algorithm for vibration reduction of building structures. The controlled damper force required by the structure has been calculated from an MR damper of load capacity 100N. A building frame has been selected to illustrate the performance of the proposed algorithm. Four different earthquake acceleration data has been used as input vibration data to the numerical frame. The proposed method of damping on the frame has been found to be more effective to reduce the structural response significantly in comparison with the conventional tuned liquid column damper. The developed method is efficient in providing the optimum control force required to the frame. Therefore, it minimizes the need of high damping capacity and the number of dampers. As a result, it reduces the cost of maintenance and structural control during earthquakes.","PeriodicalId":224851,"journal":{"name":"Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116451221","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}

{"title":"Automated Construction of Structures using 3D Printing: A Review","authors":"S. Vairagade, Narendra Kumar, RaviPratap Singh, M. Tyagi","doi":"10.38208/acp.v1.732","DOIUrl":"https://doi.org/10.38208/acp.v1.732","url":null,"abstract":"The recent advances in 3D printing techniques from past one decade in terms of materials development, product evolvement methods, industry 4.0, technological up-gradations, manpower free constructions, customised production, waste minimization, freedom from designs at an affordable cost. 3D printing processes are extensively contributing in the field of structural industry. To meet the fast-growing demand of the humans there is a need to understand the concepts and in-depth knowhow of 3D printing processes. The technological developments of 3DP to infrastructure domain are still untouched zone worldwide. It is because of lesser projects successfully carried out since its inception. The article presents insights of additive manufacturing processes and its applicability to the construction industry. In the construction industry, 3D printing has not yet reached the point of commercial availability at global level. Fewer number of 3DP experiments for large-scale buildings can be discovered in the literature. A critical analysis of past and present literature studies is conducted worldwide and also investigated the potential benefits of additive manufacturing processes to construction industry. This article's unique contribution is its examination of the many uses for 3D printing in the construction industry, as well as the advances in technology that have made this possible.","PeriodicalId":224851,"journal":{"name":"Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117009042","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}

{"title":"Nonlinear Static Analysis of Core Wall RCC Framed Buildings","authors":"A. Gond, S. Madan","doi":"10.38208/acp.v1.669","DOIUrl":"https://doi.org/10.38208/acp.v1.669","url":null,"abstract":"RCC framed buildings mainly consists of shear walls and columns for resisting lateral force due to earthquakes. In most of the framed buildings shear walls are provided in the outer frames. In addition to shear walls provided in the outer frames, RCC lift -well (core wall) is also provided in the inner core of the buildings to accommodate lift. Core wall also acts as shear wall contributing to the lateral resistance to the buildings.\u0000In the present study, nonlinear static analysis is performed to study the behaviour of high rise RCC buildings, the buildings have a centralised lift core wall with a door opening and shear walls in outer frames. The flange of core wall is joined together at regular interval by floor and slabs and connecting beams to provide proper connection in between flange. This Residential G+14 RCC framed building is lying in seismic zone 4 and analysed as per guidelines of is 1893 (part 1) 2016 and ETABS 17.0.1. Responses namely lateral loads, story drift, base shear, story displacement and the formation of plastic hinges compared for two types of buildings, namely with core wall and without core wall to understand the effect of core wall against the lateral loads.","PeriodicalId":224851,"journal":{"name":"Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117037379","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}