University of Sheffield

Design of Portland BuildingConcept design and outline

Department of Civil & Structural Engineering

Nabeel Jafri Vishal KrishnanJohn Muramya

Anuj RamdasMuhammad Shah

GROUP 8 BRIEF 1

Department of Civil & Structural Engineering

Contents

Introduction Structural schemes considered for project Major differences between the design schemes Recommendations on the chosen design scheme Considerations leading to layout Load transfer path Conformance with design briefs Preliminary member sizing Brief description of method of execution Aesthetics Questions

John M.

Vishal K.

Nabeel J.

Anuj R.

Bilal S.

Department of Civil & Structural Engineering

Introduction

• Site• Ground conditions• The Building– Basement– Ground floor– Residential floors

Department of Civil & Structural Engineering

Structural Scheme

• Choice of material – Steel / Concrete• Structural schemes– Simple construction– Continuous construction

• Common elements in the two design schemes– Structural Layout– Foundation– Retaining wall– Aesthetics

Department of Civil & Structural Engineering

Major differences betweenthe schemes

Simple Continuous

Beam / Colum connection Simple design Increased stiffness- to ensure serviceability in long spans

Column sections Smaller column sections Bigger sections especially exterior columns

Connection cost Economical More Costly

Analysis Simple – optimized choice of element sections

Complex global analysis – Optimization is difficult

Joints Do not develop moments - other members of the structure are not affected

Full moment transfer

Department of Civil & Structural Engineering

Recommendations on selection of scheme

• When strength of the structure governs design, simple construction should be adopted.

• When stiffness (serviceability) governs design, greater economy is generally achieved with simple construction.

• As the region in which the structure is to be designed is not a seismic active zone, continuous construction may not be required.

Department of Civil & Structural Engineering

Structural layout – Residential floors

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Structural layout – Ground floor

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Structural layout Basement

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Load transfer – Typical floor layout

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Load transfer - Basement

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Load transfer - Basement

Department of Civil & Structural Engineering

Conformance with design brief

Constraints :• Clear distance between columns at least 2.5m • Layout of parking space and access path • Location of columns between bays• Reasonable positioning of vertical structural

elements on the ground floor• No internal columns in the residential flats• All the perimeter columns widths are to be limited

to 250mm

Department of Civil & Structural Engineering

Structural layout – Ground floor

Department of Civil & Structural Engineering

Structural layout Basement

Department of Civil & Structural Engineering

Structural layout – Residential floors

Department of Civil & Structural Engineering

Preliminary member sizing

• Residential beam size UKB 356x171x57

• Critical Beam in the basement UKB 1016x305x437

• Critical Column in the ground floor UKB 305x305x240

Department of Civil & Structural Engineering

Proposed method of construction

• Soil Excavation• Slope stability • Retaining Wall• Dewatering• Foundation• Basement • Basic Frame • Precast Flooring

Department of Civil & Structural Engineering

Aesthetics

• Glazing and Day lighting• Façade• Lifts• Balcony• Bracing• Natural Ventilation• Landscaping

Department of Civil & Structural Engineering

Questions?