Journal of Structural Technology (e-ISSN: 2581-950X)

Dynamic Analysis of RCC Framed Structure using different Shear Wall Locations

Arjun P., Dharmesh N. — Tue, 17 Nov 2020 00:00:00 +0530

In the design of the multi-storey building, the whole building should effectively resist lateral loads such as earthquakes and wind loads acting on them. The main reason for the horizontal movement and the development of high stresses in buildings is these lateral loads. Therefore, buildings should have more strength and stiffness to resist lateral loads acting on them. To have both these, one of the most efficient structural systems is the shear wall structures. In the present study, a 13 storey RCC structure with different shear wall locations is analyzed and designed by IS: 456-2000 using ETABS software. The equivalent static lateral force method for zone-IV, soil type medium as per IS 1893:2016, part-1, and time history analysis using the Bhuj earthquake data are considered for seismic analysis. The following response quantities, such as mode period, storey displacement, and base shear using equivalent static lateral force method, and time history analysis results are tabulated and discussed. Proper location of the shear wall gives better lateral load resisting capacity in RCC buildings. These shear walls need to be provided at suitable locations to increase the stiffness and reduce the building displacement due to earthquakes.

The Parametric Study of the RC Slab Deflection is affected by Changing the Explosive Standoff Distance

Manish Kumar, Pankaj Dwivedi, Vinay Kumar Singh Chandrakar, Praveen Singh Tomar — Thu, 16 Jul 2020 00:00:00 +0530

The proposition essentially expects to research the distortions, including diversions and harm modes, which happen in fortified cement (RC) pieces when are exposed to shoot heaps of blasts. RC is the vital material used to relieve impact impacts. The chunk considered for the examination and investigation is single direction square RC piece, strengthened by steel bar work and fixed at two inverse sides. The chunk was exposed to shut in explosions of three distinctive charge loads for a steady deadlock separation. Progressed mathematical strategy by methods for nonlinear limited component examination (NFEA) was utilized for the investigation. This strategy is proficient to tackle such issues viably. Avoidances acquired from NFEA were researched and contrasted and an aftereffect of recently distributed investigation and with comes about because of utilizing the single-level of-opportunity (SDOF) ordinary strategy. While harm modes results were just contrasted and those showed up in the test. A parametric report was completed to explore the impact of changing the steel proportion (bar dispersing) and the hazardous stalemate separation on the section redirection. It was demonstrated that NFEA can successfully and sufficiently gauge the genuine piece most extreme redirection particularly when contrasted with SDOF which seemed to give traditionalist arrangements. The utilization of LBE demonstrated that it can effectively anticipate impact boundaries albeit reflected weights seemed, by all accounts, to be disparaged at high edge of occurrences. The harm modes were adequately assessed by applying LBE for close-in explosions and utilizing concrete KCC model. At long last, the parametric investigation made indicated that the RC section diversion is influenced by changing the steel bar separating or the unstable deadlock separation; henceforth the two boundaries can be balanced so as to achieve lesser chunk avoidance.

Analysis of Multilevel Structure Subjected to Geometric Non- Linearity

D. N. Kakde, Rupesh R. Dagadiya, Sayed Shoeb Iliyas — Wed, 17 Jan 2024 00:00:00 +0530

The analysis of the structures has seen a very rapid change as far as the time required is concerned after the invent of structural analysis software. With the use of this software the designers can predict the critical elements of the structure before the structure is even built and the very point to be reinforced can be found out. For this critical element detection the software uses analyses that are based on finite element method. One such method is the Geometric non linearity method, more commonly known as p- delta method. Geometric non linearity takes into account the vertical load transfer path that is changed by the lateral loads especially due to seismic excitations. This change in load transfer brings about additional moments that are to be calculated and the p-delta analysis does the same. There are two parts of the p-delta effect there is P the axial load and the delta that is the deflection due to the lateral load. P-delta analysis is a second degree analysis that takes into account the additional moments that are generated and usually are neglected during the design phase of the structure.

Comparative Study is done on Multi-Storey Building with Floating Column in Different Zones

Rajesh Kumar, Laukesh Soni, Vinay Kumar Singh Chandrakar — Tue, 08 Sep 2020 00:00:00 +0530

Present day multi-story structures are developed with abnormalities, for example, delicate story, vertical or plan anomaly, drifting segment and weighty burdens. These kind of structures have become a typical development practice in metropolitan India. It is seen that a large portion of the RC structures with such inconsistencies built are exceptionally unwanted in seismically dynamic territories from the aftereffects of past quake considers. These impacts happened because of different reasons, for example, non-uniform dispersion of mass, firmness and quality. This examination clarifies the seismic investigation of a multi-story working with gliding section developed in seismically dynamic territories watching its responses to the outside sidelong powers applied on the structure in different seismic zones utilizing the product ETABS. Along these lines featuring the elective measures including in ad libbing the non-uniform conveyance in the sporadic structure, for example, multi-celebrated structure with skimming section, and suggested the more secure plan of such structure in seismically dynamic zones considering the outcomes saw from story floats, story relocations, when contrasted with Response Spectrum technique shows best outcomes.

Nonlinear Static Analysis of Complex Shaped RC Framed Structures with Specially Shaped Columns

Shubham Chavhan, Raana Pathak, Deependra Dadoria — Wed, 05 Aug 2020 00:00:00 +0530

Specially Shaped columns are prominently using in designing complex structures, where strength, stiffness and stability become important. Complexity in shapes of structures is more critical in designing which become more challenging when subjected to seismic loads. Without any lateral loads of resisting elements, the complex structures become unsafe when subjected to seismic loads. But, by using the specially shaped columns without such lateral load resisting elements, the performance can be improved. To ensure life safety and structure’s strength, stiffness and stability, it is important to use lateral loads of resisting elements in structures that are subjected to lateral loads. In this paper, the study is carried out to understand the behaviour of complex-shaped RC structures with square columns and with specially shaped columns. The L-shaped, T shaped and Plus (+) shaped geometry (in the plan) are used as complex shapes of RC framed structures and also as a cross-section of specially shaped columns. The nonlinear static (pushover) analysis is used to analyse G+5 storey structures considered in Zone V. The comparison is carried out between complex-shaped RC framed structures with square columns and with specially shaped columns to understand the performance of structures. ETABS software is used for modelling and analysis of structures.

Comparative Analysis of Octagrid and Conventional Structural Systems

Shaikh Faizan, Nitin S. Vaidkar, Arvind B. Vawale — Sun, 06 Dec 2020 00:00:00 +0530

Tall structures have a particular affinity towards seismic lateral loads due to their shape and the slenderness of the building. The dominance of the lateral loads increases as the height of the structure increases. The lateral loads are so dominant that in some seismic areas these are the termed as loads of particular concern and the shape and the size of the structure is decided merely by these loads. To counter these loads the engineers have developed many different systems around the world some by experience and some by the use of analysis and design software that can predict the behaviour of the structure subjected to different loadings with a great amount of accuracy. This software has given tremendous space for experimentation to the designers and engineers that are always in a hustle to obtain the highest amount of safety, serviceability and functionality out of every structure. This has led to new load resisting systems that provide better lateral load resistance than conventional structures and are also aesthetically pleasing. The Octagrid load resisting system is one such system which provides lateral load resisting capability along with larger column spaces and unobstructed view to the residents.