What Are the Connection Methods Between GRC Curtain Walls and Main Structure: Design Points Analysis

In modern architectural design, curtain walls are not only the “outer garment” of a building but also a key link between aesthetic expression and structural safety. GRC curtain walls, with their lightweight high-strength properties and flexible shaping, are widely used in high-end buildings such as grand theaters and commercial complexes, while the design of their connection to the main structure directly affects the building's safety and durability. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group will systematically analyze the core connection methods and design points of GRC curtain walls from the perspectives of technical principles and engineering practice, providing professional solutions for designers and owners.

Connection Methods Between GRC Curtain Walls and Main Structures: From Force Transmission to System Coordination

A GRC curtain wall connection system must simultaneously meet three core requirements: load transmission, deformation adaptation, and installation precision. Common connection methods can be divided into two categories: rigid connections and flexible connections. Rigid connections directly fix GRC panels to the main structure through rigid components such as embedded parts and bolts, and are suitable for buildings with stable loads and minimal deformation, such as the exterior walls of commercial buildings with frame structures. Flexible connections, on the other hand, release thermal stress and structural displacement through devices such as elastic pads and sliding supports, and are mostly used in landmark buildings with large spans in high-seismic-intensity regions. For example, the “bolt + spring damping” flexible joint adopted in a convention and exhibition center project successfully withstood structural settlement of ±50mm.

In actual projects, Qinglong Group often adopts “three-dimensionally adjustable connection joint” technology, achieving high-precision control of GRC panel installation errors within ≤2mm through fine-tuning devices in the X/Y/Z directions. This connection method was verified in the Nanjing East Road Century Plaza renovation project, where the connection joints between the light-transmitting GRC curtain wall and the steel structure not only met the transparency requirements of architectural aesthetics, but also ensured durability of more than 50 years through built-in anti-corrosion steel components.

Connection Design Points: Coordinated Optimization of Material Selection, Load Calculation, and Joint Construction

When designing a GRC curtain wall connection system, comprehensive consideration must be given from three dimensions: material properties, load analysis, and construction details. In terms of materials, connection components should be made of materials with deformation coefficients close to those of the GRC substrate. For example, the difference in linear expansion coefficient between the hot-dip galvanized steel components used by Qinglong Group and GRC is controlled within 1.2×10⁻⁶/℃, effectively preventing cracking caused by thermal stress. Load calculations must cover wind loads, seismic action, self-weight, and temperature loads. For instance, in typhoon-prone areas, the design value of wind suction resistance for connection joints must reach 1.5kN/m² or above.

Detail treatment of joint construction is equally critical. Qinglong's technical team has summarized the “triple anti-corrosion, one drainage” principle in detailed design: all metal components adopt hot-dip galvanizing + fluorocarbon spraying for dual anti-corrosion; joint cavities are provided with drainage slopes and weep holes; and connection gaps are filled with weather-resistant sealant to ensure water tightness. In a museum project, this joint design successfully solved the leakage problem of the GRC curtain wall in a high-temperature and high-humidity environment, earning high recognition from the owner.

Full-Chain Service Assurance: Technical Support from Detailed Design to After-Sales Maintenance

As a national high-tech enterprise integrating detailed design, manufacturing, and construction installation, Qinglong Group has established a full-process quality control system for GRC curtain wall connection systems. In the design phase, BIM technology is used for parametric modeling and force simulation of connection joints; in the production stage, automated production lines ensure the dimensional precision of GRC components; during construction, 3D laser scanning enables real-time correction of installation positioning errors. In addition, Qinglong's exclusive “5-year regular maintenance + lifetime technical support” service guarantees the long-term stable operation of the connection system, which is also an important reason why many central state-owned enterprises and well-known real estate groups choose Qinglong as their strategic partner.

From the GRC special-shaped curtain wall of the Dongguan Women and Children's Activity Center to GRP landscape components exported to Southeast Asia, Qinglong Group has always taken “creating beautiful architecture” as its mission, integrating 28 years of technical accumulation into the design and practice of every connection joint. In the future, with the innovative application of new materials such as UHPC/GRC in the construction field, Qinglong will continue to promote the upgrading of connection technology, contributing Chinese wisdom to the world's architectural decoration industry.