Precast Wall Panels with End Plates for High-Rise Core Walls
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Solution Overview
Problem
Conventional precast wall systems lack the strength and efficiency to resist and transfer wind and gravity loads in high-rise building core wall systems, and they are labor-intensive and costly due to the need for cast-in-place concrete construction methods.
Innovation Solution
A precast wall system comprising interconnected precast panels with top and bottom end plates, vertical bars, and cementitious material, featuring panel-to-panel vertical and horizontal reinforcing members, and lifting lugs for efficient construction and connection, allowing for the formation of high-rise building core or perimeter walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional precast modular components are used to construct volumetric enclosures, then construction can be performed in advance under controlled conditions, but the components lack sufficient strength to resist and transfer wind and gravity loads in high-rise building core wall systems
Solution Approach 1:
The core wall system is divided into multiple precast concrete panels that can be manufactured separately under controlled conditions and then assembled on-site. Each panel is a discrete module with standardized connection interfaces, allowing parallel production while maintaining individual quality control during manufacturing.
Solution Approach 2:
The precast panels utilize composite construction combining reinforced concrete with embedded steel connection elements (end plates, reinforcing bars, anchor bolts). This composite approach provides both the mass and strength of concrete while incorporating the high-strength connection capabilities of steel, enabling the panels to resist wind and gravity loads when properly connected.
2Strength
If cast-in-place concrete core systems are used to erect a high-rise building, then structural integrity can be achieved, but labor intensity and construction schedule time increase significantly
Solution Approach 1:
The concrete panels are cast, cured, and have their connection elements installed in advance at the precast facility before being transported to the construction site. This preliminary manufacturing of structural components eliminates time-consuming on-site formwork erection, concrete pouring, and curing等待 periods, significantly accelerating the overall construction schedule while maintaining structural integrity through factory-controlled quality.
Solution Approach 2:
The continuous concrete core wall is segmented into discrete precast panels that can be manufactured independently and assembled rapidly using crane-lifted connections. This segmentation transforms a monolithic, time-intensive cast-in-place process into a modular assembly process, reducing labor intensity and extending construction productivity.
3Reliability
If cast-in-place concrete core wall systems are used, then structural damping and safety can be provided, but construction workers cannot work on lower floors while concrete contractors work above due to falling concrete risk
Solution Approach 1:
All concrete panels are manufactured, cured, and have their connection elements installed in advance at the precast facility before being transported to the construction site. This preliminary manufacturing eliminates on-site concrete pouring operations from upper levels, removing the hazard of falling concrete to workers on lower floors and allowing simultaneous work on multiple levels without schedule delays.
Data Source
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Figure 3A~3B
AI summary
A precast wall system and a method for constructing a high-rise building using the precast wall system is disclosed. The system includes a plurality of interconnected precast panels. Each precast panel has a top end plate, a bottom end plate, a plurality of vertical bars disposed between and attached to the end plates and a cementitious material encasing the vertical bars and defining a plurality of sides of the respective panel. A first group of the interconnected precast panels are arranged vertically on a second group of the interconnected precast panels and the top end plate of each panel corresponding the first group is connected to the bottom end plate of a respective one of the panels corresponding to the second group. Methods for horizontally and vertically connecting the precast panels to each other are also disclosed.