STRUKTO SELECTED PROJECTS - STRUCTURAL ND GEOTECHNICAL DESIGN June - - PDF document

STRUKTO

SELECTED PROJECTS - STRUCTURAL АND GEOTECHNICAL DESIGN

June 2019

STRUKTO 74A Hristo Smirnenski Blvd 1164 Sofia Bulgaria +359 88 493 8573 www.strukto-bg.com

TABLE OF CONTENTS

Contents

1. COMPANY OVERVIEW ___________________________________________________________________________ 1 2. SERVICES _________________________________________________________________________________________ 2 3. TECHNOLOGICAL PLATFORM __________________________________________________________________ 3 4. SELECTED PROJECTS ___________________________________________________________________________ 5

4.1. SKY FORT TOWER, Sofia, Bulgaria, Height: 202 m.____________________________________________ 5 4.2. CAPITAL FORT TOWER, Sofia, Bulgaria, Height: 126 m. _____________________________________ 11 4.3. ZLATEN VEK TOWER, Sofia, Bulgaria, Height: 120+ m. ______________________________________ 15 4.4. CITY TOWER, Sofia, Bulgaria, Height: 75 m. __________________________________________________ 19 4.5. G–TOWER, Sofia, Bulgaria, Height: 56 m. ______________________________________________________ 22 4.6. NV TOWER, Sofia, Bulgaria, Height: 108 m ____________________________________________________ 25 4.7. SYNERGY TOWER, Sofia, Bulgaria, Height: 83 m. _____________________________________________ 29 4.8. BUSINESS PARK SOFIA: BUILDING 15, Sofia, Bulgaria _______________________________________ 33 4.9. RADINA RESIDENCE, Sofia, Bulgaria, Height: 87 m. __________________________________________ 36 4.10. MHQ COMBO HOTEL, Sofia, Bulgaria, Height: 75 m. _________________________________________ 38 4.11. EAST FORT TOWERS, Sofia, Bulgaria, Height: 75 m. _________________________________________ 40

COMPANY OVERVIEW

Page 1 Strukto

• 1. COMPANY OVERVIEW

Strukto is a structural and geotechnical engineering practice based in Sofia, Bulgaria, founded in 2003. Strukto is an independent group of engineers and designers, offering professional services related to buildings design. Since 2003 Strukto team has constantly grown and today is comprised of 15 Master of Science engineers, specialized in the field of reinforced and post-tensioned concrete, steel structures, seismic design and BIM (Building information modeling). Strukto provides a full range of engineering services for buildings projects. The types of projects include high-rise buildings, hotels, residential buildings, shopping centers, mixed-use buildings, convention centers, sports facilities, industrial buildings, special structures, educational and health centers. We prepare our projects using wide range of world languages (English, Spanish, Russian, German, Bulgarian and Romanian) and design codes (ACI, British Standard, Eurocodes, SNIP, etc.). Essential part of our work is covered by the BIM techniques using cutting edge technological platforms. Strukto incorporates BIM in the pre-design and design development stage of each project to achieve undeniable benefits for designers, contractors and owners. The information contained within our coordinated BIM models enables richer analysis than traditional processes and created in one phase of project life cycle can be passed to the next for further development and reuse.

SERVICES

Page 2 Strukto

• 2. SERVICES

 Structural Engineering – We provide a full range of structural engineering services for buildigns – from the most complex Finite Element Method analyses to detailing and production of shop drawings for reinforced concrete, post-tensioned concrete and steel structures.  Geotechnical Engineering - We provide geotechnical designs for foundations (shallow, pile and combined piled raft foundations), retaining structures (diaphragm walls, soldier pile walls, secant and contiguous pile walls, cantilever and gravity walls) and underground structures using “top-down” construction method. We begin our designs with the simple classical methods and gradually proceed to the more advanced Finite Element Method analyses. Finite element modeling

• f complex geotechnical projects using state-of-the-art soil constitutive models is the key tool in
• ur everyday practice;

 Building Information Modeling – BIM is an essential process to all aspects of the construction of a building, from the design, the estimating, the supply chain, the delivery of goods during the build, the construction process, the resource allocation, the productivity requirements to meet targets and to the post-handover phase through Facilities and Asset Management. Strukto incorporates BIM in the development of each project to achieve undeniable benefits for designers, contractors and owners: improved overall project quality, reduced conflicts and changes during construction, improved review, coordination and collaboration, lower risk and better predictability of outcomes, faster drafting without loss of quality, optimization of schedule and cost;  Seismic Engineering – High seismic activity of Balkans (Bulgaria, Romania, Greece) is a key factor which allowed us to develop a great seismic engineering expertise, with emphasis in high- rise buildings. Each building in this region, from 2 level Muzeiko (Children’s Museum of Sofia) to 47 stories Sky Fort Tower, requires detailed seimic evaluation and detailing;  Performance Based Design – PBD is an international design approach based on state of the art structural engineering. As opposed to traditional design approach, the performance based design explicitly evaluates the seismic performance of the structure under a series of nonlinear dynamic analysis to ensure the expected performance are met;  Site Supervision – Success of each structural or geotechnical project is entirely dependent on the authors’ supervision at the construction site. We are constantly visiting our projects sites and inspecting each vertical element or slab, as it is strictly required by the law in Bulgaria. Our job doesn’t finish in the comfortable offices, but continues on the construction sites, supporting the contractors during the entire construction process.

TECHNOLOGICAL PLATFORM

Page 3 Strukto

• 3. TECHNOLOGICAL PLATFORM

The key to enabling of BIM aspects is the technological platform. Strukto uses top of the line technologies such as REVIT and TEKLA, thus allowing creation of models that meet the detail requirements for up to LOD500 (level of development). Level 2 BIM is the minimum standard set to achieve. Sharing of information is carried out seamlessly through Industry Foundation Classes (IFC). We have more than 10 years of experience utilizing Building Information Modelling technology in the structural design process. We rely on the BIM platform which provides great compatibility between different parts of the design – Architecture, Structure, MEP and other disciplines. Connection with the architects provided by REVIT is supplemented by TEKLA and ALLPLAN to form a unique BIM TRIO which is capable of covering stringent Client’s requirements in each point of the world. Our advanced engineering software platform and in-house software development facilitate the design of innovative structural solutions with complex geometry and large scale. It is a standard practice for each project to produce full 3-D virtual model of the building structures. Drawings, including plans, elevations, details, and perspectives, are produced and extracted directly from the model. Coordination with other disciplines is improved through the use of these models and through automated clash detection. The 3-D model also allows direct communication with model data to structural and geotechnical engineering design software packages. Accuracy and productivity are improved because all aspects of the structural system are managed in a single file. Despite the standard usage of IFC, we have developed custom software applications which exploit the API and scripting abilities for exchanging geometry and model data between REVIT, ETABS and PLAXIS (see Figure 3.1 below). Strukto uses the following internationally recognized software packages:  BIM: Autodesk REVIT, TEKLA Structures, Nemetschek ALLPLAN;  Structural Analysis: CSI ETABS, Autodesk ROBOT;  RC and PT Slab Analysis: ADAPT Edge, Autodesk ROBOT;  Detailing & Scheduling of 3D Reinforcement: TEKLA Structures, Nemetschek ALLPLAN;  Geotechnical Design: PLAXIS 3D, Geo 5;

TECHNOLOGICAL PLATFORM

Page 4 Strukto REVIT Structure model Custom API link to ETABS Custom API/Python link to PLAXIS Figure 3.1 Example of the used BIM data exchange model (MQH Combo Hotel – top; G-Tower – bottom)

REVIT TEKLA ETABS PLAXIS 3D ROBOT

Custom API Autodesk Link Custom API

SELECTED PROJECTS

Page 5 Strukto

• 4. SELECTED PROJECTS

4.1. SKY FORT TOWER, Sofia, Bulgaria, Height: 202 m.

STRUKTO SERVICES Complete Structural Design and detailing of reinforced and post- tensioned concrete and steel structures; Geotechnical Design of foundations. KEY FACTS  Seismicity: agr=0.23g  Superstructure: 47 stories  Basement: 3 stories, 13-15 m deep excavation  Foundations: Combined Piled Raft Foundation  Lateral stability: RC Central Core  Floor System: Post-tensioned slab with drop panels for the basements, post-tensioned flat plate for the superstructure;  TBA: 94 000 sq. m.  Status: Under Construction Following the successful design and construction of Capital Fort Tower, Strukto was awarded as Structural and Geotechnical designer for the second high-rise development of Fort Noks. Reaching the height of 202 m, Sky Fort office building will be one of the highest towers in the Southeast Europe.

SELECTED PROJECTS

Page 6 Strukto Sky Fort and Capital Fort Towers– Render of the structures by Strukto REVIT model, 2016

SELECTED PROJECTS

Page 7 Strukto Sky Fort – Strukto ETABS calculation model, 2016 Sky Fort – Strukto PLAXIS 3D calculation model, 2016

SELECTED PROJECTS

Page 8 Strukto Sky Fort – Strukto Tekla model of the core walls reinforcement, 2016 Sky Fort – High-rise area excavation and piling works, 2017

SELECTED PROJECTS

Page 9 Strukto Sky Fort – Part of the low-rise area foundation raft prior to concreting, 2017 Sky Fort – Construction of post-tensioned basement slab, 2017

SELECTED PROJECTS

Page 10 Strukto Sky Fort – Reinforcement works of 3.3 m thick foundation raft below the high-rise, 2017 Sky Fort – Tower construction, 2019

SELECTED PROJECTS

Page 11 Strukto

4.2. CAPITAL FORT TOWER, Sofia, Bulgaria, Height: 126 m.

STRUKTO SERVICES Complete Structural Design and Detailing of reinforced and post-tensioned concrete and steel structures; Geotechnical Design of foundations; Geotechnical Monitoring of the foundations performance and building settlements; KEY FACTS  Seismicity: agr=0.23g  Superstructure: Block A – 29 stories, 126 m tall, Block B – 9 stories, 34 m tall  Basement: 2 stories, 9-12 m deep excavation  Podium: 5000 sq. m. steel roof  Foundations: Combined Piled Raft Foundation  Lateral stability: RC Central Core and Ductile Moment Resisting Frames  Floor System: Flat slab with drop panels for the basements, post-tensioned flat plate (Block A), band beam slab (Block B);  TBA: 80 000 sq. m.  Status: In Use AWARDS Office building of the year in Bulgaria, 2015 Structural Engineer of the year in Bulgaria, 2015, First prize European Property Award Winner, 2016-2017

SELECTED PROJECTS

Page 12 Strukto Capital Fort is a mixed used, 126 m high tower located in Sofia and it is currently the tallest building in

• Bulgaria. The entire complex comprises of four building elements: a 2-storey deep basement under the

entire site footprint, a ground floor retail and conference facility (podium), a 6-storey low rise office building (Block B) and 29-storey high rise office building (Block A). Capital Fort - Render of concrete structure from Strukto REVIT model, 2009 Capital Fort –Strukto ETABS calculation model, 2009

SELECTED PROJECTS

Page 13 Strukto Capital Fort - Foundations construction, 2010 Capital Fort - Superstructure construction, 2012

SELECTED PROJECTS

Page 14 Strukto Capital Fort –Strukto Tekla model and real construction of steel façade elements, 2012

SELECTED PROJECTS

Page 15 Strukto

4.3. ZLATEN VEK TOWER, Sofia, Bulgaria, Height: 120+ m.

STRUKTO SERVICES Complete Structural Design and Detailing of reinforced concrete and steel structures; Geotechnical Design of foundations; Geotechnical Monitoring of the foundations performance and building settlements; KEY FACTS  Seismicity: agr=0.23g  Superstructure: 34 stories, 120+ m tall  Basement: 3 stories, 13 m deep excavation  Foundations: Combined Piled Raft Foundation  Lateral stability: RC Central Core  Floor System: Flat plate  TBA: 34 000 sq. m. Perched dramatically at one of the highest hills of Sofia, Zlaten Vek Tower (Golden Age) will be the highest residential tower in Bulgaria, and the third tallest building overall.

SELECTED PROJECTS

Page 16 Strukto Zlaten Vek - Render of concrete structure by Strukto REVIT model, 2016

SELECTED PROJECTS

Page 17 Strukto Zlaten Vek –Strukto ETABS calculation model, 2016 Zlaten Vek – Structural elements in PLXIS 3D calculation model, 2017

SELECTED PROJECTS

Page 18 Strukto Zlaten Vek –Piles construction, 2017 Zlaten Vek –Tower construction, 2018

SELECTED PROJECTS

Page 19 Strukto

4.4. CITY TOWER, Sofia, Bulgaria, Height: 75 m.

STRUKTO SERVICES Complete Structural Design and Detailing of reinforced and post-tensioned concrete structures; Geotechnical and structural design of the retaining structures using “top-down” construction method and combined piled raft foundation system; KEY FACTS  Seismicity: agr=0.23g  Superstructure: Block A – 20 stories, 75 m tall; Block B – 8 stories, 30 m tall  Basement: 6 stories, 22 m deep excavation  Foundations: Combined Piled Raft Foundation  Lateral stability: RC Central Core  Floor System: Flat plate for the basement levels, post-tensioned flat plate above the ground floor  TBA: 55 000 sq. m.  Status: In use Located in Sofia downtown, City Tower is a 75 m high office building. Proximity of the adjacent Syndicate Tower set particular geotechnical challenges, because of the 22 m deep excavation needed for the Sofia record 6 basement levels of the new development. Top-down construction was selected as structurally adequate and feasible method for basements construction.

SELECTED PROJECTS

Page 20 Strukto City Tower – Strukto BIM model in REVIT (partial section) City Tower – Strukto ETABS calculation model, 2010

SELECTED PROJECTS

Page 21 Strukto City Tower – “Top-down” excavation of the sixth basement level City Tower - Construction progress, 2016

SELECTED PROJECTS

Page 22 Strukto

4.5. G–TOWER, Sofia, Bulgaria, Height: 56 m.

STRUKTO SERVICES Complete Structural Design and Detailing of reinforced concrete structures; Geotechnical Design of foundations; Stability analyses for the sloped excavations and the adjacent infrastructure; KEY FACTS  Seismicity: agr=0.23g  Superstructure: 19 stories  Basement: 2 stories, 8 m deep excavation  Foundations: Raft Foundation  Lateral stability: RC shear walls  Floor System: RC flat plate  TBA: 11 800 sq. m.  Status: In Use

SELECTED PROJECTS

Page 23 Strukto G-Tower – Strukto BIM model in REVIT G-Tower – Strukto Geotechnical model in PLAXIS 3D

SELECTED PROJECTS

Page 24 Strukto G-Tower – Level 12 slab construction G-Tower – Start of façade construction

SELECTED PROJECTS

Page 25 Strukto

4.6. NV TOWER, Sofia, Bulgaria, Height: 108 m

STRUKTO SERVICES Complete Structural Design and Detailing of reinforced concrete, post-tensioned and steel structures; Geotechnical Design of foundations; KEY FACTS  Seismicity: agr=0.23g  Superstructure: 20 stories  Basement: 3 stories, 13 m deep excavation  Foundations: Raft Foundation  Lateral stability: RC shear walls  Floor System: RC flat plate, PT large span band beams in the first 3 floors above ground levels;  TBA: 46 500 sq. m.  Status: Under Construction

SELECTED PROJECTS

Page 26 Strukto NV Tower– Render of the structures by Strukto REVIT model, 2018

SELECTED PROJECTS

Page 27 Strukto NV Tower –Strukto ETABS calculation model, 2018 NV Tower – Partial section of Strukto PLAXIS 3D Geotechnical model, 2018

SELECTED PROJECTS

Page 28 Strukto NV Tower – Foundation raft construction, 2018 NV Tower – Second Floor Inclined Columns Construction, 2019

SELECTED PROJECTS

Page 29 Strukto

4.7. SYNERGY TOWER, Sofia, Bulgaria, Height: 83 m.

STRUKTO SERVICES Complete Structural Design and Detailing of reinforced concrete and PT structures; Geotechnical Design

• f

foundations and Excavation Retaining Structures; KEY FACTS  Seismicity: agr=0.23g  Superstructure: 17 stories  Basement: 2 stories, 9 m deep excavation  Foundations: Raft Foundation  Lateral stability: RC central core  Floor System: post-tensioned flat plate;  TBA: 50 700 sq. m.  Status: Under Construction

SELECTED PROJECTS

Page 30 Strukto Synergy Tower– Render of the structures by Strukto REVIT model, 2018

SELECTED PROJECTS

Page 31 Strukto Synergy Tower – Strukto ETABS calculation model, 2018 Synergy Tower – Partial view - Strukto PLAXIS 3D Geotechnical calculation model, 2018

SELECTED PROJECTS

Page 32 Strukto Synergy Tower – Foundation raft reinforcement, 2019

SELECTED PROJECTS

Page 33 Strukto

4.8. BUSINESS PARK SOFIA: BUILDING 15, Sofia, Bulgaria

STRUKTO SERVICES Complete Structural Design and Detailing of reinforced and PT concrete; Geotechnical Design of retaining structures for the excavation and foundations. KEY FACTS  Seismicity: agr=0.23g  Superstructure: 6 stories, 25 m tall  Basement: 2 stories, 8 m deep excavation  Foundations: Raft Foundation  Lateral stability: Two RC cores  Floor System: RC flat plate, post-tensioned footbridges  TBA: 32 000 sq. m.  Status: In Use

SELECTED PROJECTS

Page 34 Strukto BPS15 – Strukto BIM Model in REVIT (Retaining Structures + Building) BPS15 – Strukto Finite element ETABS model

SELECTED PROJECTS

Page 35 Strukto BPS15 – Foundation raft reinforcement BPS15 – Finished Footbridges

SELECTED PROJECTS

Page 36 Strukto

4.9. RADINA RESIDENCE, Sofia, Bulgaria, Height: 87 m.

STRUKTO SERVICES Complete Structural Design and Detailing of reinforced and post-tensioned concrete; Geotechnical and structural design of the retaining structures using “top-down” construction method and combined piled raft foundation system; KEY FACTS  Seismicity: agr=0.23g  Superstructure: 25 stories  Basement: 5 stories, 18 m deep excavation  Foundations: Combined Piled Raft Foundation  Lateral stability: RC shear walls  Floor System: RC flat plate for the basements, post-tensioned plate for the superstructure levels  TBA: 46 000 sq. m.  Status: Start of construction 2019

SELECTED PROJECTS

Page 37 Strukto Radina Residence – Strukto BIM model in REVIT of „top-down” construction stage (partial section) Radina Residence – Strukto BIM model of the structure (partial section), REVIT

SELECTED PROJECTS

Page 38 Strukto

4.10. MHQ COMBO HOTEL, Sofia, Bulgaria, Height: 75 m.

STRUKTO SERVICES Complete Structural Design and Detailing of reinforced and post-tensioned concrete; Geotechnical Design of retaining structures for the excavation and foundations; KEY FACTS  Seismicity: agr=0.23g  Superstructure: 24 stories  Basement: 3 stories, 11 m deep excavation  Foundations: Combined Piled Raft Foundation  Lateral stability: RC central core  Floor System: RC flat plate, post- tensioned beams for the podium conference halls  TBA: 18 000 sq. m.  Status: Design Development Stage

SELECTED PROJECTS

Page 39 Strukto MHQ Combo Hotel – Strukto BIM Model in REVIT MHQ Combo Hotel – Strukto Geotechnical model in PLAXIS

SELECTED PROJECTS

Page 40 Strukto

4.11. EAST FORT TOWERS, Sofia, Bulgaria, Height: 75 m.

STRUKTO SERVICES Complete Structural Design and Detailing of reinforced and post-tensioned concrete and steel structures; Geotechnical Design of foundations. KEY FACTS  Seismicity: agr=0.23g  Superstructure: 19 stories  Basement: 3 stories, 13-15 m deep excavation  Foundations: Combined Piled Raft Foundation  Lateral stability: RC Central Core  Floor System: Post tensioned slab with drop panels for the basements, post-tensioned flat plate for the superstructure  TBA: 53 000 sq. m.  Status: Design Development Stage

SELECTED PROJECTS

Page 41 Strukto East Fort – Strukto BIM Model in REVIT