Precast Core Wall System for High-Rise Buildings

2019 ◽  
Author(s):  
Juan E. Carrion ◽  
William F. Baker ◽  
Charles Besjak
Keyword(s):  
New York ◽  
Precast Concrete ◽  
Concrete Strength ◽  
Attractive Alternative ◽  
Lateral Loads ◽  
Concrete Core ◽  
High Rise ◽  
The Core ◽  
Steel Shapes ◽  
Wall System

<p>The design of high-rise buildings is usually governed by lateral forces (e.g., wind or seismic). One of the most efficient structural systems to resist lateral loads is the core wall system. Traditionally high-rise concrete cores have been constructed using cast-in-place concrete, however precast systems offer an attractive alternative to cast-in-place construction. A precast concrete core wall system has been developed for high-rise buildings and will be presented in this paper. The main components of the system are the core walls, which are composed of multiple precast panels. The panel layout is determined based on the geometry of the tower and the capacity of the transportation and lifting equipment, while the wall thickness, concrete strength, and reinforcement are determined to satisfy strength and serviceability requirements. Several methods for connecting the panels have been developed, including combinations of embedded steel shapes, bolts, welds, and continuous reinforcing bars or post-tensioning. An application of the system to a 296 m (972 feet) tower in New York City is presented in this paper. This application demonstrates that the precast core wall system is an attractive and viable alternative to cast-in-place construction, capable of resisting the large forces associated with high-rise buildings, and with several advantages, including speed of erection, cost, as well as the high quality of precast concrete.</p>

Evaluation and selection of curtain wall systems for medium-high rise building construction

2014 ◽  
Vol 32 (4) ◽  
pp. 299-314 ◽  
Author(s):  
Abdul-Mohsen Al-Hammad ◽  
Mohammad A. Hassanain ◽  
Mohammed N. Juaim
Keyword(s):  
Precast Concrete ◽  
Building Construction ◽  
Curtain Wall ◽  
Content Type ◽  
High Rise ◽  
High Rise Building ◽  
First Choice ◽  
Different Types ◽  
Wall System ◽  
Selection Of

Purpose – The purpose of this paper is to present a systematic approach for the evaluation and selection of curtain wall systems for medium-high rise building construction. Design/methodology/approach – The authors have identified the different types of curtain wall systems that are commonly used in the building construction industry in Saudi Arabia; examined the various performance as well as financial and non-financial criteria affecting the evaluation and selection of these systems; and subjected the identified different types of curtain wall systems to several filtering processes, namely feasibility ranking, evaluation by comparison and weighted evaluation to facilitate making a decision on the most suitable system to select. Findings – The analysis of the collected data indicated that the precast concrete curtain wall system is considered to be the first choice. The second choice is the prefabricated brick panel curtain wall system. Originality/value – Curtain walls are the most recognized elements of contemporary structures today. There exists ample variety of materials and designs that could be utilized for the development of these building elements. This paper is of practical value to project owners, architects and design professionals endeavoring on the process of selecting and specifying curtain wall systems in their projects.

Manhattan West: Converting Site Challenges into Design Opportunities

2019 ◽  
Author(s):  
Preetam Biswas ◽  
Georgi I. Petrov ◽  
Yunlu Shen ◽  
Samuel Wilson ◽  
Charles Besjak
Keyword(s):  
New York ◽  
Structural System ◽  
Moment Frame ◽  
Steel Moment Frame ◽  
Concrete Core ◽  
The Core ◽  
Steel Core ◽  
Train Tracks ◽  
Penn Station ◽  
Structural Solutions

<p>As cities worldwide are increasing in density, building departments and municipalities are allowing construction using the air‐rights above transportation infrastructure to maximize use of valuable real estate. One Manhattan West (1MW) and Two Manhattan West (2MW) are supertall office towers recently designed and engineered by Skidmore, Owings &amp; Merrill (SOM) that rise above the underground train approach to New York City’s Penn Station. Although the towers are neighbors and have a similar program, they are undercut by the train tracks in different ways. The disparate below ground conditions result in two distinct structural solutions.</p><p>The structural system of 1MW is a concrete core and a perimeter steel moment frame. The site conditions prevent the perimeter of the 304‐meter‐tall tower from reaching the foundation. This challenge is addressed by transferring the perimeter to the core above the ground, thus making 1MW one of the slenderest structures in New York City. The structural system of 2MW consists of a central braced steel core with outrigger and belt trusses and a perimeter steel moment frame. Here the perimeter reaches the foundation with a few lateral transfers however only half of the core reaches terra firma. This paper presents a side‐by‐side comparison of the structural solutions for the two towers.</p>

Analysis on the Holistic Resistant Behavior of Super High-Rise Concrete Structure Affected by the Concrete Strength of the Core of the Joints

2015 ◽  
Vol 1091 ◽  
pp. 89-95
Author(s):  
Zhao Yang ◽  
Di Wu
Keyword(s):  
Finite Element ◽  
Concrete Strength ◽  
Element Model ◽  
Construction Process ◽  
Design Requirement ◽  
High Rise ◽  
The Core ◽  
Design Requirements ◽  
Core Concrete ◽  
The Finite Element Model

In the construction process of super high-rise structures, in order to simplify the construction process and ensure the construction quality, the construction team always make the concrete of joint core use the same strength grade with beams and plates, and pouring with them together. So that the concrete strength of joint core fail to meet the design requirement, whether the resistant behavior of the structure can be able to meet the design requirements is the key problem we focus on. In this paper, the finite element model of a super high-rise structure was established by MIDAS/GEN software, the holistic resistant behavior of the structure under the action of frequent earthquake was analyzed to study the effect of joint core concrete strength on the whole structure. The study provides the basis for further exploring a more reasonable pouring method of the concrete of the joints.

Analysis on the Holistic Resistant Behavior of Super High-Rise Structure Affected by the Concrete Strength of the Core of the Joints

2013 ◽  
Vol 631-632 ◽  
pp. 747-753
Author(s):  
Zhao Yang ◽  
Qing Hai Mei
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Concrete Strength ◽  
Element Model ◽  
Construction Process ◽  
High Rise ◽  
The Core ◽  
Design Requirements ◽  
Core Concrete ◽  
The Finite Element Model

There are some disadvantages in the concrete pouring method of column beam joints of super high-rise structures. If the concrete of joint core use the same strength grade with beams and plates, and pouring with them together, the construction process will be simplified and the construction quality will be easier to ensure. But the concrete strength of joint core is reduced, so whether the resistant behavior of the structure can be able to meet the design requirements is the key problem we focus on. The finite element model of a super high-rise structure was established by MIDAS software, the holistic resistant behavior of the structure was analyzed to study the effect of joint core concrete strength on the whole structure. The study provides the basis for further exploring a more reasonable pouring method of the concrete of the joints.

scholarly journals Diagnostic Reliability in the Assessment of Degradation in Precast Concrete Elements

2021 ◽  
Vol 6 (11) ◽  
pp. 164
Author(s):  
Antonio Bossio ◽  
Giuseppe Faella ◽  
Giorgio Frunzio ◽  
Mariateresa Guadagnuolo ◽  
Roberto Serpieri
Keyword(s):  
Precast Concrete ◽  
Construction Material ◽  
Concrete Strength ◽  
Research Area ◽  
Past Century ◽  
Concrete Core ◽  
Diagnostic Reliability ◽  
Core Sampling ◽  
Long Span ◽  
Concrete Elements

In the past century, precast reinforced concrete has become the most widely used construction material in infrastructure engineering, especially for long-span structures. Nowadays, a growing research area concerns the assessment of concrete strength degradation due to environmental exposure and reinforcement corrosion. This paper reports an experimental campaign on some prefabricated concrete elements that were exposed to atmospheric agents for approximately 20 years. The campaign took the uncommon opportunity to access the full inspection and sampling of rebar. The included activities had different invasiveness and encompassed inspections, core sampling, corrosion potential mapping, compressive strength tests, as well as neutralization depth assays on cored surfaces, on chisel-split surfaces, and on drilling powders. The results bring together a global diagnostic picture of very limited degradation and of elements that are fully able to attend their design service life; the latter is estimated to be considerably higher than 20 years and to exceed 75 years if the concrete mix does not show quality issues. Results also permit drawing considerations on a hierarchy of diagnostic reliability in the evaluation of RC degradation, in which concrete core sampling plays the role of golden standard.

scholarly journals Study on Behaviour of Outrigger System on High Rise Structure by Varying Outrigger Depth in Seismic Zones of India by Using Staad Pro

2021 ◽  
pp. 420-423
Author(s):  
Mayuri N. Ade ◽  
Prof. G. D. Dhawle ◽  
Prof. M. M. Lohe
Keyword(s):  
Tall Buildings ◽  
Shear Walls ◽  
Tall Building ◽  
Lateral Stiffness ◽  
Lateral Loads ◽  
High Rise ◽  
The Core ◽  
Lateral Forces ◽  
Almost Everywhere ◽  
The World

Tall building development is rapidly growing almost everywhere in the world acquainting new difficulties that need to be met with, through engineering evaluation. In tall buildings, lateral loads generated by earthquake or wind load are frequently resisted by providing coupled shear walls. But as the height increases, the building becomes taller and the efficiency of the tall building greatly depends on lateral stiffness and resistance capacity. So, a system called outrigger is introduced which improves overturning stiffness and strength by connecting shear wall core to outer columns. When the Structure is subjected to Lateral forces, the Outrigger and the columns resist the rotation of the core and thus significantly reduce the lateral deflection and base moment, which would have arisen in a free core. During the last three decades, numerous studies have been carried out on the analysis and behaviour of outrigger structures. But this question is remained that how many outriggers system is needed in tall buildings. (Using Staad-Pro)

Influence of Concrete Strength of the Core of the Joints on the Holistic Resistant Behavior of Super High-Rise Structure

2013 ◽  
Vol 351-352 ◽  
pp. 396-400 ◽  
Author(s):  
Zhao Yang ◽  
Xiao Yu ◽  
Yang Zhi Zhong
Keyword(s):  
Finite Element ◽  
Concrete Structure ◽  
Concrete Strength ◽  
Core Area ◽  
Finite Element Models ◽  
Construction Process ◽  
Construction Quality ◽  
High Rise ◽  
The Core ◽  
Design Requirements

In the construction process of the super high-rise concrete structure, it’s easy to be happened that the concrete strength of joints can’t meet design requirements. Some finite element models of a super high-rise building were established by MIDAS in the paper, which were used to analyze the influence of concrete strength of the core of the joints on the holistic resistant behavior. The study may provide the basis for solving the construction quality problems of the core area of joints

The Study on the Water Immersing Time Impact over the Concrete Anti- Compression Strength with Rock-Drilling Method

2011 ◽  
Vol 137 ◽  
pp. 144-148
Author(s):  
Jin Yang Zhang
Keyword(s):  
Compression Strength ◽  
Concrete Strength ◽  
Research Result ◽  
Test Method ◽  
Rock Drilling ◽  
Concrete Core ◽  
Core Drilling ◽  
The Core ◽  
Drilling Method ◽  
Different Diameters

Rock-drilling method, as an on-spot test method for structure concrete anti-compression strength is intensively applied in construction, water conservancy, navigation, ports and road building etc and diversified criterions assume prominent differences in preservative conditions before rock-drilling concrete anti-compression strength test. The research result concludes in case the core drilling samples of different diameters and strength are immerged in water up to saturated degree, the anti-compression strength (ACS) is considerably decreased, the smaller diameter and less strength concrete core samples show even worse quality against the original natural dried ones. Only by means of correctly understanding the tested project and better applying of the core drilling test technical criterion can the project structural concrete strength be optimistically mastered.

Flexural Resistance of Steel-Coconut Shell Concrete-Steel Composite Beam with Normal and J-Hook Shear Studs

2020 ◽  
Vol 12 (9) ◽  
Author(s):  
Lakshmi Thangasamy ◽  
◽  
Gunasekaran Kandasamy ◽  
Keyword(s):  
Concrete Strength ◽  
Steel Plates ◽  
Coconut Shell ◽  
Core Material ◽  
River Sand ◽  
Concrete Core ◽  
Conventional Concrete ◽  
Moment Capacity ◽  
The Moment ◽  
Core Concrete

Many researches on double skin sandwich having top and bottom steel plates and in between concrete core called as steel-concrete-steel (SCS) were carried out by them on this SCS type using with different materials. Yet, use of coconut shell concrete (CSC) as a core material on this SCS form construction and their results are very limited. Study investigated to use j-hook shear studs under flexure in the concept of steel-concrete-steel (SCS) in which the core concrete was CSC. To compare the results of CSC, the conventional concrete (CC) was also considered. To study the effect of quarry dust (QD) in its place of river sand (RS) was also taken. Hence four different mixes two without QD and two with QD both in CC and CSC was considered. The problem statement is to examine about partial and fully composite, moment capacity, deflection and ductility properties of CSC used SCS form of construction. Core concrete strength and the j-hook shear studs used are influences the moment carrying capacity of the SCS beams. Use of QD in its place of RS enhances the strength of concrete produced. Deflections predicted theoretically were compared with experimental results. The SCS beams showed good ductility behavior.

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