What Problems Can Non-Standard Reinforcement Around Screw Holes in Components Cause?

Non-standard reinforcement around the screw holes of GRC components can lead to a series of problems such as stress concentration and connection failure, seriously compromising the safety of curtain wall systems. Based on extensive engineering practice and experimental research, Qinglong Group has systematically analyzed the hazards of this issue and the corresponding preventive measures. In the Zengcheng Qiangwei Garden project in Guangzhou, we ensured the reliability of the connection system through standard hole-edge reinforcement techniques and quality control.

Stress concentration is the most direct consequence of non-standard hole-edge reinforcement. As a weak point of the component, the screw hole is prone to stress concentration under load. If hole-edge reinforcement is insufficient, the stress concentration factor can reach 3-5 times, far exceeding the tensile strength of the material and causing cracking around the hole. Qinglong's finite element analysis shows that with standard reinforcement, the stress concentration factor around the hole can be kept below 2.0, whereas non-standard reinforcement may exceed 4.0, significantly increasing the risk of cracking.

Reduced connection reliability is another serious problem. Non-standard hole-edge reinforcement affects the anchoring performance of screws and reduces the load-bearing capacity of connection points. Under wind loads or seismic action, connection points may slip or even fail, causing components to fall off. Qinglong's tests show that connection points with standard reinforcement can achieve a safety factor of over 3.0, while non-standard reinforcement may fall below 2.0, posing a serious safety hazard.

Durability issues must not be overlooked either. Micro-cracks around the hole gradually propagate under the action of moisture and temperature, accelerating material aging. In corrosive environments, cracks provide channels for corrosive media, aggravating the corrosion of steel reinforcement. Qinglong's long-term observations have found that components with non-standard hole-edge reinforcement show obvious performance degradation after 5-10 years of use, while components with standard reinforcement can remain in good condition for more than 20 years.

Qinglong Group has established a comprehensive hole-edge reinforcement standard, covering every aspect including the selection of reinforcement materials, the determination of the reinforcement range, and the control of construction techniques. Through strict process discipline and quality inspection, every screw hole is guaranteed standard reinforcement, providing assurance for the long-term safety of curtain wall systems.