ARCH 371
BUILDING TECHNOLOGY
SHELL STRUCTURE
SUBMITTED TO:
Md. Asifur Rahman
Lecturer
DEPT. OF ARCHITECTURE,
CUET
SUBMITTED BY:
ID: 1906010
SHELLS OF REVOLUTION
In architecture, a shell of revolution refers to a structural element or form that is created by
rotating a two-dimensional shape around an axis. This technique is often used in the design
of buildings, particularly in the construction of domes, vaults, and other curved structures.
The basic concept behind a shell of revolution is that a flat or curved shape, such as an arc
or a section of a circle, is rotated about a central axis to create a three-dimensional
structure. The resulting form is typically smooth and continuous, without any abrupt changes
in curvature.
Shell structures of revolution have been used throughout history. They offer several
advantages in architectural design, including structural efficiency, the ability to span large
distances without the need for internal supports, and an aesthetically pleasing appearance.
These structures are known for their elegance and grace, as they often create visually striking
architectural features.
The construction of shell structures of revolution requires careful consideration of factors
such as material strength, load distribution, and stability.
Examples of famous architectural structures that utilize shells of revolution include the
Pantheon in Rome, which features a large domed roof, and the Sydney Opera House in
Australia, with its iconic shell-like forms.
EXAMPLE :
Bosjes Chapel is an example of a shell of revolution in
architectural design. Located in the Western Cape province
of South Africa, the Bosjes Chapel showcases a stunning
and intricate shell-like structure.
Designed by Steyn Studio, the chapel's roof is formed by a
series of undulating curved surfaces that resemble the
petals of a flower. These surfaces are created by rotating a
section of a circle around a central axis, giving rise to the
shell of revolution form.
The chapel's shell structure is not only visually striking but
also serves a functional purpose. It provides a sense of
enclosure while allowing natural light to filter through the
curved openings, creating a serene and contemplative
interior space.
The Bosjes Chapel demonstrates the beauty and elegance
that can be achieved through the use of shell structures of
revolution in contemporary architectural design.
BOSJES CHAPEL
WOLSELEY,
SOUTH AFRICA
AREA: 430 sqm
STRUCTURAL PROPERTIES
Form and Geometry: The Bosjes Chapel features a
shell-like structure with curved surfaces, resembling
the petals of a flower. The design incorporates smooth,
flowing lines and organic shapes, creating a visually
captivating and harmonious architectural form.
Load Distribution: Shell structures distribute loads and
forces evenly across their surfaces, allowing for
efficient load transfer and structural stability. The
curved shape of the chapel's roof helps in spreading
and transferring the loads, providing structural
strength and integrity.
Material Selection:
Constructed from a slim cast concrete shell, the
undulating roof rises to form six peaks – one at each
corner and one in the middle of each long elevation. It
is supported at four points where it falls dramatically
to meet the ground. Below, expanses of glazing are
framed in timber to give the appearance of crucifixes.
Structural Support: Shell structures often require
minimal internal supports or columns due to their
inherent strength and ability to span large distances.
The design of the Bosjes Chapel likely incorporates a
structural framework or support system that
complements the shell-like roof, ensuring stability and
balance.
An icon of bosjus state
Harmonies with mountain