Seismic steel structure

Category：

Steel Structure
Browse number：

8
Release time：

2025-03-28 16:41:41
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Detailed Description

I. Core Advantages of Seismic Steel Structure

High ductility energy-consuming design

Material ductility: low yield point steel (LYP160, yield strength 160MPa, elongation ≥40%) is used to increase plastic deformation capacity by 50%;

Nodal optimization: dog-bone weakening (RBS), stiffening rib reinforcement to ensure outward displacement of plastic hinges in the nodal zone and to protect the integrity of weld seams.

Multiple Lateral Force Resistance Systems

Frame-bracing system: X-type or eccentric bracing (EBF), 30%-50% increase in lateral stiffness;

Cylinder structure: steel frame-concrete core combination, suitable for ultra-high-rise buildings, lateral shift angle ≤1/500.

Intelligent vibration damping technology

Buckling Restrained Bracing (BRB): core plate energy consumption capacity ≥500kJ/m, displacement ±50mm;

Viscous dampers: force range 500-5,000kN, damping efficiency ≥35% (EN 15129 standard).

Full life cycle economy

Lightweight: 60% weight reduction compared to concrete structures, 25% reduction in foundation costs;

Maintenance cost: 70% reduction in 50-year maintenance cost, recyclable rate ≥95%.

Second, the core product series and technical parameters

Product Type	Specifications and materials	Seismic technical indicators	Applicable Scenarios
Lateral Force Resistant Steel Frame	Q355GJC, H section 600×300×12×20	Interstory displacement angle ≤1/250 (8 degree rare earthquake)	Schools, hospitals, office buildings
Buckling Restrained Brace (BRB)	Core plate LY160, jacket pipe Q355B, section 200×200mm	Design displacement ± 2% layer height, fatigue life ≥ 50 cycles	Public buildings in high intensity zones
Combined steel plate shear wall	Double steel plate + concrete filling, thickness 200-400mm	Shear bearing capacity ≥15,000kN/m, damping ratio ≥0.06	Ultra-high-rise core, nuclear power plant
Self-resetting steel frame	SMA shape memory alloy nodes, prestressing strand reinforcement	Post-earthquake residual deformation ≤ 0.1%, reset rate ≥ 90%	Data centers, emergency command centers
Seismic isolation bearings	LRB series, diameter 500-1500mm, lead core damping	Horizontal displacement capacity ±500mm, equivalent stiffness 1,000kN/m	Bridges across faults, heritage buildings

III. Key Seismic Technologies

Node ductility design

RBS node: beam end flange arc cutting, plastic corner ≥ 0.03rad;

End plate connection: high strength bolts (10.9S grade) preload error ≤±5%.

Integration of energy-consuming devices

Metal damper: shear steel plate energy dissipation, yield force 200-2,000kN, displacement ±50mm;

Tuned mass damper (TMD): mass block 10-500t, damping frequency 0.5-5Hz.

Intelligent monitoring system

Fiber grating sensor: real-time monitoring of stress and deformation, accuracy ±1με;

AI early warning platform: automatic alarm for abnormal data, damage localization error ≤ 0.5m.

Materials and manufacturing process

High-strength anti-seismic steel

Q355GJD: -40℃ impact work ≥47J, Z-direction performance Z35;

Q460FR: fire-resistant steel, strength retention ≥67% at 600℃.

Precision welding technology

Robot narrow gap welding: bevel angle 10°, heat input ≤1.5kJ/mm;

Ultrasonic flaw detection: weld defect detection rate ≥99.5% (GB/T 11345 standard).

Anti-corrosion and fire prevention system

Nano-ceramic coating: salt spray resistance ≥15,000 hours (ISO 9227);

Intumescent fireproof coating: thickness 2.5mm, fire resistance limit ≥2 hours (GB 14907).

Contact

Mobile number: 13848510731

Landline number: 0471-6490861

Address: Inside the courtyard of the Outer Transport Company, diagonally opposite the government of Haoqinying Town, Xincheng District, Hohhot City, Inner Mongolia (National Highway 110)