Brief Portfolio MF

2016

MIHAI FLOREA - PORTFOLIO

MIHAI FLOREA - PORTFOLIO 1

Contents

Tottenham Hotspurs Stadium (under construction) - London, United Kingdom ................................................................... 2

Private House - Corbeanca, Ilfov County, Romania .............. 4

Residential Complex Barbu Vacarescu - Bucharest, Romania ............................................................................................. 6

Centre for Aviation Technology Research - Craiova, Romania ............................................................................................. 9

Secondary Steel Structures and Panoramic Lifts Moldova Centre - Iasi, Romania ........................................................ 11

Residential Complex Ghencea (under construction) - Bucharest, Romania ........................................................... 14

Residential 4-Storey Building - Brasov, Romania ................ 17

Multipurpose 6-Storey Residential Building - Bucharest, Romania ............................................................................. 19

Remodelling and Extension Mercedes-Benz Showroom - Bucharest, Romania ........................................................... 22


Tottenham Hotspurs Stadium (Under construction) – London, United Kingdom

Role: Structural design (in-situ concrete team)

Structure: reinforced concrete, precast concrete, steel roof

Software: Robot Structural Analysis, AutoCAD, Bluebeam RevU

Tottenham’s new stadium in London is being built as part of the Northumberland project. The 61000-seat venue is set to open in time for the 2018 season. The structure is a mix of reinforced concrete (foundations, cores and columns), pre-tensioned slabs and beams, precast seating units and beams, composite decks and steel roof. As part of the in-situ concrete team, I was responsible for designing and checking elements (the North Podium, North stand stairs) and several connections (shear heads that mixed in-situ concrete with precast units). Design was done to Eurocode 2 specifications, and CIRIA recommendations. The fast-paced programme (to meet the 2018 target), the vast amount of people working on different elements that have to tie together, all are constant challenges in order to make this sports dream come true.


Above: Architectural Renders (Exterior & Interior)


Private House Corbeanca, Ilfov County, Romania

Role: structural design, lead draftsman and detailing

Structure: reinforced concrete, seismic isolation

Software: ETABS, SAP2000, Allplan, AutoCAD

The structural challenge was the client's desire for a very versatile space in the context of the earthquake prone area of Corbeanca (ag = 0.24g). The compromise between flexibility and simplicity (symmetry of structural elements and other recommendations of all seismic codes) was reached using seismic isolator devices. The house itself measures nearly 1500 square meters, has only one floor and a technical basement (used for MEP and the isolators). The structure can be summed up as reinforced concrete, flat slabs, shear walls and columns. 33 friction sliding pendulums make up the isolation system, made by ALGA (IT) in order to achieve a 3.56 second main period and a maximum design displacement of 480 mm. The 8 million euro investment also includes several other smaller buildings (an indoor swimming pool and spa - 1000 sqm, a house by the lake - 200 sqm and a security/maintenance hut – 100 sqm).


Above: General View – Under Construction

Below: Aerial View – Completed Building


Residential Complex Barbu Vacarescu Bucharest, Romania

Role: lead structural design, temporary works (excavation)

Structure: reinforced concrete, deep urban excavation

Software: ETABS, SPW, Allplan, AutoCAD

The residential complex has 6 identical 15 storey buildings, 36m high, with 3 basement levels for parking. The bracing system consists of separate shear walls, interconnected by beams. My role included the general structural layout and design, finding a balanced system that works with the major intrusions of the basement and the generous room space of the upper levels.


Above: Side by side comparison – Structural elements and architectural layout for a typical floor


Above: General basement layout (with cyan shear walls that extend to the top of the buildings)

Below: Temporary works - Excavation support structure

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Centre for Aviation Technology Research Craiova, Romania

Role: secondary design, general detailing and draughtsman

Structure: steel, large-span structures

Software: ETABS, SAP2000, Advance Steel, AutoCAD

The repair and maintenance hangar for commercial aircraft was designed using structural steel. The main hangar has two 54-m main spans and was designed in two different solutions, with either haunched main beams or 5 meter high trusses. The main building spans 66 by 108 meters and is designed using finite element analysis software (ETABS) and cross-checked with different software (SAP2000) to ensure the validity of the design. The centre also has several smaller structures and totals (with annexes) a total of 11230 sqm.


Secondary Steel Structures Panoramic Lifts Moldova Centre Iasi, Romania

Role: lead structural design, detailing

Structure: steel, refurbishment and rehabilitation works

Software: ETABS, Advance Steel

The existing commercial buildings, one built in 1974 and the other built in 2006, had to be structurally rehabilitated in order to convert the shopping mall into a business centre. The existing buildings, both made from reinforced concrete, were seismically rehabilitated using steel sheathing previously, and the secondary structures were designed to be as light and as seismically neutral as possible. The elevator tower was designed as a separate structure, connecting to the existing building using sliding joints to allow free movement under seismic loads.


Above: Cantilever Connection Detail – section

Below: Cantilever Connection Detail – 3D


Above: General View – Under Construction

Below: Cantilever Connection Detail – As-built


Residential Complex Ghencea (Under construction) - Bucharest, Romania

Role: lead structural design, detailing, project manager

Structure: reinforced concrete, seismic isolation

Software: ETABS, Allplan

The residential complex has 8 different building types, five with 10 storeys and three with 5 storeys. The structures have shear walls working together with beams and columns for both gravitational and seismic loads. Foundation-wise, a thick 1.20m concrete mat is designed for the 10 storey blocks and a 60cm thick concrete mat provides support for the lower height blocks. The structures are visually very similar but due to differences in both openings and facades, 8 completely different structural systems were conceived for both economy and reliability of the seismic design. One of the buildings was also designed using seismic isolators as a test to check the feasibility of the investment. The small difference in cost (under 5%, tender estimates) can greatly increase the efficiency of the seismic bearing system and can be considered a technical first in Romania. A total of 16 isolators per each building are required to firmly shift the main period of the structure for sound seismic reliability (from 0.900 sec to 3.800 sec).


Above: Full Analysis Model – 3D View


Above: Seismic isolated version - Shear wall layout and seismic devices layout


Residential 4-Storey Building Brasov, Romania

Role: lead structural design, concept and detailing, temporary works (excavation)



The 4-storey residential building is anything but ordinary, being nested in a steep hill between two existing houses. The challenge in this project was to devise a solution for both the excavation and the erection of the building. The structure itself is made from reinforced concrete, acting as both a support system for the hill and the main bearing system for gravitational and seismic loads. Due to the high levels of stress from geotechnical loads, a very small behavioural factor for seismic loads was used (1.50, quasi-elastic design). The excavation was designed in multiple phases, using a mix of 400 mm sheet-pile-walls and a partial top-down excavation (the first floor acts as a supporting system for the pile-walls while the basement is dug from underneath).

Above: General Cross-section


Below: First storey – GA


Above: Excavation – Final Phase


Multipurpose 6-storey Residential Building Bucharest, Romania

Role: lead structural design, detailing, project management



The 6-storey high building is designed using reinforced concrete. The proximity to an existing 1930 masonry building posed a challenge for the excavation works. A 10.75 x 18.80 m rectangle, the structural layout features both moment resisting frames and concrete shear walls. Due to a very large infill panel, a special detail was designed to disconnect the masonry from the main structure in order to maintain a proper balance of seismic rigidity.

Above: Architectural 3D View


Above: Mat Foundation Reinforcement

Below: BIM Model 3D View


Remodelling and Extension Mercedes Benz Showroom Bucharest, Romania

Role: lead structural design, detailing

Structure: steel, existing concrete structure

Software: ETABS, Advance Steel

The existing concrete structure was given a visual upgrade using a Mercedes-Benz brand identity design involving a steel roof and circular steel columns. An extension of the existing building was designed as a separate structure, composed of cross-shaped columns and moment resisting frames.


Above: BIM Model 3D View

Below: Front Façade – Under Construction

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