Q460 Q690 Bracing Steel Framing Anti Seismic Design For Buildings And Infrastructure

Product Description
A Seismic Bracing Frame is a high-performance structural system engineered specifically to resist seismic forces and dissipate seismic energy, integrating anti-seismic design, energy absorption, and structural stability enhancement. Manufactured with Q460/Q690 ultra-high-strength steel (bracing members) and Q355B high-strength steel (connection nodes), this product features a dual-functional design—combining elastic bracing members for load-bearing and buckling-restrained braces (BRBs) or viscous dampers for energy dissipation—to minimize structural damage during earthquakes (seismic intensity zones 7-9 degrees). The bracing members adopt optimized cross-sections (box-section, H-beam, or circular pipe) with yield strength ≥460MPa and lateral stiffness ≥1.8×10⁵ kN/m, ensuring structural lateral displacement is limited to ≤H/800 (H=frame height) and inter-story drift to ≤1/500, fully complying with GB 50011 seismic design code and AISC 341 anti-seismic standards. Connection nodes utilize rigid bolt-welded joints with 12.9-grade high-strength bolts and full-penetration welds, reinforced by ductile stiffeners to prevent brittle failure, while factory prefabrication rate ≥95% guarantees component precision (dimension error ≤±0.5mm) and reduces on-site welding (a major source of seismic vulnerability). The surface is treated with hot-dip galvanizing + fluorocarbon coating (dry film thickness ≥120μm) or cathodic electrophoresis, providing salt spray resistance ≥1500 hours and adapting to urban, coastal, and industrial environments. Key features include seismic energy dissipation capacity (absorbing ≥30% of seismic input energy), ductile design (plastic hinge formation in designated areas to protect critical components), and compatibility with base isolation systems. It supports customization of bracing configurations (eccentric, chevron, cross) and energy dissipation devices (BRBs for medium-high seismic zones, viscous dampers for super-high-rise structures), with load-bearing capacity verified via cyclic loading tests (≥200 cycles of El Centro seismic wave). Professional services include seismic performance simulation, pushover analysis, on-site installation supervision, and post-earthquake structural assessment, ensuring the frame meets the strict safety and durability requirements of seismic-prone areas.

Applications
Seismic Bracing Frames are critical structural solutions for buildings and infrastructure in earthquake-prone regions, trusted for their ability to enhance seismic resilience and protect lives and property. Certified by GB 50011, AISC 341, and ISO 9001, they meet international anti-seismic standards, making them a preferred choice for residential, commercial, and public buildings. These frames are widely used in high-rise and super-tall buildings (residential skyscrapers, office towers) in seismic zones (e.g., Sichuan, Yunnan, Japan, California), public buildings (hospitals, schools, emergency command centers) requiring post-earthquake functionality, industrial facilities (power plants, chemical plants, data centers) with critical equipment, infrastructure (bridges, tunnels, subway stations), and residential communities in medium-high seismic intensity zones. They are particularly essential for projects in seismic intensity zones 8-9 degrees, where traditional bracing systems cannot meet ductility and energy dissipation requirements. The system’s energy-absorbing design also makes it ideal for seismic retrofitting of old buildings (strengthening existing structures to meet current anti-seismic standards). The minimum order quantity is 1 set (customized per project), with full tailoring based on seismic intensity, building height, load conditions, and architectural layout. Competitive project-based pricing and flexible delivery terms (25-50 workdays based on complexity) support construction schedules in seismic-prone areas, while a monthly supply capacity of 60 project sets ensures timely delivery. Customization options include corrosion-resistant upgrades (316L stainless steel, super duplex stainless steel) for coastal seismic zones, fire-resistant coating integration (fire resistance ≥2.5 hours) for public buildings, and ultra-high-strength Q960 steel for super-tall structures to balance seismic performance and structural weight. Whether it's for new construction in seismic-prone areas or existing structure seismic retrofitting, the Seismic Bracing Frame delivers reliable, resilient, and life-saving structural performance.