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Orbit Tower

Orbit Tower

(Issue of a magazine 3/2018, page 100)

While most of high-rise buildings feature a core surrounded by a spatial frame defining the volume, one could envision a column-free plan where the perimeter structure is constituted of steel cables, working in tension to suspend the floor plates and transferring the loads to the core by means of story-high trusses located along the perimeter, as well as diagonally across the floor, at the mechanical levels.

Survey Validity Assessment of Tall Buildings Technical Condition

Survey Validity Assessment of Tall Buildings Technical Condition

(Issue of a magazine 3/2018, page 108)

The paper presents the validity analysis of survey, monitoring and the study of cause and effect relationships, which affect safety and robustness of tall building structures. The algorithms to evaluate the risk of obtaining unreliable data on the parameters of structure physical wear processes and the technical state of buildings are reviewed in the study.

Structural Health Monitoring for SHM

Structural Health Monitoring for SHM

(Issue of a magazine 3/2018, page 112)

Ping–An Finance Center (PAFC), with a total height of 600 m, is the fourth tallest building in the world. An integrated structural health monitoring (SHM) system with total number of 553 sensors, which was designed based on the modular design methodology, is being installed in PAFC to monitor its structural performance and external excitations during both construction and service stages. This paper first gives a brief introduction of the architecture of the SHM system, followed by detailed descriptions on its 7 subsystems, including the components, functions, and interrelationship corresponding to each subsystem. The modular design of the SHM system ensures highly effective operation of the comprehensive monitoring system, and such an extensible system allows the subsystems to be deployed and augmented easily to meet the evolving monitoring needs.

Orbit Tower

Orbit Tower

(Issue of a magazine 2/2018, page 94)

While most of high-rise buildings feature a core surrounded by a spatial frame defining the vol­ume, one could envision a column-free plan where the perimeter structure is constituted of steel cables, working in tension to sus­pend the floor plates and transferring the loads to the core by means of story-high trusses located along the perimeter, as well as diagonally across the floor, at the mechanical levels.

Emboss Tower: Embossed Structural Skin for Tall Buildings

Emboss Tower: Embossed Structural Skin for Tall Buildings

(Issue of a magazine 2/2018, page 102)

The article deals with the function of a structural skin with an embossed surface applicable to use for tall building struc­tures. The major diagrid system with a secondary embossed surface struc­ture provides an enhanced perimeter structural sys­tem by increasing tube section areas and reduces aerodynamic loads by dis­orienting major organized structure of winds. A para­metric study used to inves­tigate an optimized con­figuration of the embossed structure revealed that the embossed structure has a structural advantage in stiffening the structure, reducing lateral drift to 90% compared to a non-embossed diagrid base­line model, and results of wind load analysis using computational fluid dynamics, demonstrated the proposed embossed system can reduce surface wind load. The resulting undulating embossed skin geometry presents both opportunities for incorporating versatile interior environments as well as unique chal­lenges for daylighting and thermal control of the envelope. Solar and thermal control requires multiple daylighting solu­tions to address each local façade surface condition in order to reduce energy loads and meet occupant comfort standards. These findings illustrate that although more complex in geometry, architects and engineers can produce tall buildings that have less impact on the environ­ment by utilizing struc­tural forms that reduce structural steel needed for stiffening, thus reduc­ing embodied CO2, while positively affecting indoor quality and energy perfor­mance, all possible while creating a unique urban iconography derived from the performance of build­ing skin.

Undeniable Progress: Benefits of Natural Ventilation

Undeniable Progress: Benefits of Natural Ventilation

(Issue of a magazine 2/2018, page 114)

The challenge for today’s architects and building designers is to provide energy efficient, environ­mentally friendly buildings at the same time achiev­ing good indoor climate conditions. This is an especially tough challenge for designers of supertall buildings.

Culture Plaza: Performance and Iconicity of Megastructures

Culture Plaza: Performance and Iconicity of Megastructures

(Issue of a magazine 1/2018, page 102)

A series of challenging site constraints prompted an innovative structural solution for the Guizhou Culture Plaza Tower (GCP), through which a new performance based expression was created for Guiyang’ skyline. A design solution that values performance, iconicity, and the public realm with equal weight was a result of an integrated and collaborative process. By leveraging technology, the GCP Tower is an example of an emerging new design language that is reshaping supertall tower design; an integrated workflow that is based on solving performance based criteria as its primary focus.

Mjøstårnet – башня у озера

Mjøstårnet – башня у озера

(Issue of a magazine 1/2018, page 112)

Mjøstårnet is an 18-storey timber building, which is currently under construction. Ground works were started in April 2017. Installation of timber structures started in September 2017, and the building will be structurally topped out in June 2018. The building will be completed and opened in March 2019. The net area is 11300 m2, and there will be offices, hotel, apartments, restaurant and a roof terrace. Next to the tower there will be a large indoor swimming arena, see Figure 1. “Mjøstårnet” is Norwegian and means “The tower of lake Mjøsa”.

1000 m Tall Jeddah Tower: Vertical Shortening Considerations

1000 m Tall Jeddah Tower: Vertical Shortening Considerations

(Issue of a magazine 4/2017, page 96)

Jeddah Tower will be the first man-made structure to reach a kilometer in height upon its completion in 2019.  From conception, it was clear that an all-concrete superstructure would present many advantages for a building of such unprecedented height and slenderness.  An all-concrete structure, however, did present many challenges that needed to be addressed in the system arrangement and through comprehensive analysis and design, among them vertical shortening effects due to the time-dependent creep and shrinkage of concrete.  This paper outlines and presents the engineering solutions developed by the authors regarding this complex concrete material phenomenon, while addressing the construction and regional challenges associated with realizing a concrete tower of this unprecedented scale.

Traveling Wave Similitude

Traveling Wave Similitude

(Issue of a magazine 4/2017, page 106)

The mixed-use Raffles City (RCH) development is located near the Qiantang River in Hangzhou, the capital of Zhejiang province, located southwest of Shanghai, China. The project incorporates retail, offices, housing and hotel facilities and marks the site of a cultural landscape within the Quianjiang New Town Area. The project is composed of two 250 m tall super high-rise twisting towers with a form of vibrant waves and a commercial podium and 3 storey basement car parking. It reaches a height of 60 stories, presenting views both to and from the Qiantang River and West Lake areas, with a total floor area of almost 400,000 m2. Composite moment frame plus concrete core structural system was adopted for the tower structures. Concrete filled steel tubular (CFT) columns together with steel beams reinforced concrete (SRC) beams form the outer moment frame of the tower structures. The internal slabs and floor beams are of reinforced concrete. This paper presents the engineering design and construction of this highly complex Project. Through the comprehensive discussion and careful elaboration, some conclusions are reached, which serve as the guidance and reference of the modern composite design and construction of similar free form hybrid mix use buildings.