Connection Methods Between GRC Curtain Walls and Main Structures and Design Key Points Analysis

Under the dual considerations of modern architectural aesthetics and structural safety, GRC curtain walls have become the preferred solution for landmark building envelope design thanks to their lightweight, high-strength and flexible formability. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group leverages its full-chain service capabilities to provide an in-depth analysis of the key connection technologies between GRC curtain walls and main structures, offering professional solutions for designers and owners.

Core Classification and Engineering Applications of GRC Curtain Wall Connection Systems

The connection methods between GRC curtain walls and main structures must balance load transfer, displacement compensation and installation precision, and are mainly divided into three systems: post-installed embedment connection, steel structure bracket connection, and precast concrete support connection. Post-installed embedments are fixed to the main structure via expansion bolts or chemical anchors and are suitable for concrete wall substrates. Qinglong adopted this solution, combined with 3D laser positioning technology, in several commercial complex projects, achieving installation error ≤3mm. Steel structure bracket connections build transfer frames using angle steel or square steel tubes, making them especially suitable for steel structure bodies or complex curved curtain walls. For example, in a double-curved GRC curtain wall project for a grand theater, Qinglong used BIM parametric design to optimize bracket spacing, effectively reducing structural dead weight.

Key Technical Points of Connection Joint Design

The seismic performance of joints is the core guarantee of GRC curtain wall safety. Following the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), Qinglong's technical team reserves ≥20mm of horizontal displacement in joint designs and uses elastic shims to absorb vibration loads. For anti-corrosion treatment, all metal connectors feature dual protection of hot-dip galvanizing plus fluorocarbon spraying, combined with Qinglong's self-developed GRC-specific sealant, ensuring joint durability in harsh environments such as marine climates. For oversized GRC components (up to 15㎡ per panel), an innovative "four-point elastic support" design is adopted, enabling 3D fine adjustment through adjustable bolts and solving the problem of stress cracking to which traditional rigid connections are prone.

Full Life-Cycle Quality Control System

From detailed design to after-sales maintenance, Qinglong has established a quality control mechanism covering the entire process. At the design stage, finite element analysis software is used to simulate the load-bearing capacity of connection joints, ensuring structural safety under conditions of 1.5kPa wind load and seismic intensity 8; in production, GRC components are manufactured on automated assembly lines, ensuring embedded connector position deviation ≤2mm; during installation, a "double-inspection system" is implemented, with spatial positioning re-verified by total stations and torque testing conducted on every joint. In an airport terminal project, Qinglong achieved zero-accident delivery of 30,000㎡ of GRC curtain wall with this system, and the related technical achievements won a provincial Science and Technology Progress Award.

As a national high-tech enterprise and participant in formulating GRC industry standards, Qinglong has always taken "creating beautiful architecture" as its mission, transforming 28 years of engineering experience into technical advantages. Whether for super high-rise landmarks or cultural venues, the connection design of GRC curtain walls requires the deep integration of material performance, structural mechanics and construction technology. Only by choosing a supplier with full-chain service capabilities can architectural aesthetics be achieved while building a solid foundation of structural safety. Qinglong is willing to empower project innovation with professional technology and join hands with partners to create architectural models that combine artistic value with engineering quality.