Journal of Recent Activities in Infrastructure Science (e-ISSN: 2582-3124)

Seismic Analysis and Design of RCC Silo by Considering Different Seismic Zones and Soil Types

Sajid Rahman — 2023-11-17

Tanks, silos, bunkers, and bins are examples
of buildings used to store bulk solids. There is
no standard term for these structures;
towering buildings used to store commodities
like coal, wheat, and cement are called silos,
while shallow buildings used to store coal,
gravel, crushed stone, and other items are
named bins or bunkers. It is possible to lift
and sustain elevated silos with reinforced
concrete frames or columns. Typically, they
feature a cylindrical shell, a conical hopper,
and a conical roof. Many businesses, such as
the cement, power, and oil and gas sectors
(where sulfur pellets are stored) and cement
plants (which store clinkers), use circular silos
made of steel or reinforced concrete to store
materials. Elevated steel and reinforced
concrete circular silos for storage
demonstrate how they perform during
earthquakes; the stability of the reinforced
concrete silos is increased by the use of shear
walls, while the stability of the steel silos is
increased by the use of steel panels on the
opposite side. Shear wall panels cause the
structure to move less and become stiffer. The
load calculations, load combinations, load
assignment, seismic parameters, and analysis
have all been documented in this study, and
the analysis's findings have also been
provided and compared. All of the model
outputs are shown, along with the minimum
values needed for beams and columns. The
maximum absolute stresses and maximum
shear stresses created in each model are
shown by contour diagrams, tables, and
graphs.

Shear Walls are Used in Performance-Based Seismic Assessments of High- Rise Buildings to Minimize Lateral Displacement

Dinesh Bhuriya — 2024-01-03

The main objectives of this study are to
compare and analyze the behaviour of
structures across various time intervals, as
well as storey displacements, storey shear,
and storey drift. Each of the four variations is
based on a skyscraper with twenty stories.
The normal structure will be considered in
Model I, the floating column structure in
Model II, the shear wall structure in Model
III, and the combination of shear walls and
floating columns in Model IV. Similar static
approaches and the response spectrum are
used in seismic performance evaluations of
structures of 20 stories or higher. using
Indian Standard code IS 1893(Part1) 2002
and ETABS-2018 software. Calculations are
made for drift, shear, storey displacements,
and seismic zone IV time.
For types II, III, and IV, the storey drift was
smaller than that of a typical construction. In
model II, the storey shear about the normal
structure decreased, while in models III and
IV, it increased. Model II has a longer
floating column structure period than the
other three versions. When compared to the
other four varieties, the model III
construction performs better and has
stronger strength and smaller displacements.

Re-orienting towards Safer Roads Infrastructure in Nepal

Hemant Tiwari — 2023-12-31

Nepal recently updated its National Road Safety Action Plan (2013-2020) for the period 2021-2030, aiming to reduce the alarming rise in road crashes, fatalities, and major injuries observed over the past decade. The paper primarily delves into the multiple facets of safer road infrastructure while specific design standards exist for national, rural, and urban roads, guiding engineers in the initial stages of road design and construction to ensure safety—many parameters, such as radius, sight distance, and gradient, are frequently overlooked, especially on hill roads. The road safety audit stands out as the most effective method for pinpointing safety issues throughout the road construction process, from the planning phase to operation, and for suggesting necessary safety enhancements. Nonetheless, the actual implementation of these audits remains inadequate. Additionally, the paper sheds light on the state of road crashes, the institutional framework dedicated to safe road infrastructure development, specific guidelines and standards about road safety, and the current status of road safety audits and other interventions across road projects in Nepal.

“Seismic Performance Considerations for Flat Slabs and Beam Slabs in Multi-Storey Buildings”

Kumar Suman Saurabh — 2023-09-29

Flat slab construction offers greater
architectural flexibility, allowing for more
open floor plans without the need for
numerous columns or beams. The design of
flat slab buildings maximizes the use of
interior space, as no beams or columns
obstructing it. Additional measures and
design considerations are required to
progress the seismic concert of both
predictable RC frame buildings and flat slab
structures in seismic regions. The proposed
alternate floor flat-beam slab structure may
be one such measure to address the seismic
challenges while maintaining some of the
advantages of flat slab construction. Seismic
safety is a critical factor in building design,
especially in areas prone to earthquakes, and
careful engineering and analysis are essential
to ensure the safety and performance of
structures. The analysis focuses on the seismic
behaviour of these building types in seismic
zone II. Seismic behaviour includes
examining how the buildings respond to
earthquake forces, what changes occur in
each type of structure, and which structural
elements are affected.

Dynamic Analysis of High Rise Building with Shear Wall using STAAD Pro

Naveen Jatav — 2024-01-03

The main objectives of this study are to
compare and analyze the behaviour of
structures throughout various periods, storey
displacements, storey shear, and storey drift.
Based on a G+10-story skyscraper, there are
four models. The normal structure will be
considered in Model I, the floating column
structure in Model II, the shear wall structure
in Model III, and the combination of shear
walls and floating columns in Model IV.
Buildings with G+10 stories are subjected to
seismic analysis utilizing both response and
comparable static techniques. This technique,
makes use of the Indian Standard code IS
1893(Part-1) 2002 and the STAAD PRO
application. Shear, drift, storey
displacements, and the seismic zone IV period
are derived. Model II has larger
displacements while model III has lower
displacements due to the load combination of
1.2 (DL+LL+RSX). In models III and IV, the
storey shear concerning the normal structure
increased, whereas in model II, it decreased.
Model II has a longer floating column
structure period than the other three
versions. When compared to the other four
models, the Model III construction exhibits
superior performance, reduced
displacements, and increased strength.