Prefabricated House Foundation Steel Frame

The prefabricated house foundation steel frame is a three-dimensional load-bearing system formed by connecting steel beams, steel columns, and other components through welding or bolting. As the core structure of prefabricated houses, it features high strength, lightweight, and excellent seismic resistance.

I. Composition and Characteristics of the Foundation Steel Frame

The steel frame consists of components such as steel beams and steel columns, connected through welding or bolting to form a three-dimensional load-bearing system. Its core characteristics include:

1. Excellent Mechanical Properties: Steel has high tensile strength and is lightweight, with uniform distribution of horizontal and vertical load-bearing capacities. Horizontal arrangements can resist wind loads and seismic actions, while vertical support components ensure overall structural stability.
2. Flexible Connection Methods: Components are connected through welding or bolting, adapting to various scenario requirements. For example, nodes in fully prefabricated and detachable hidden-frame panel villas are all bolted, facilitating disassembly and reuse.
3. Material Recyclability: The steel's full lifecycle recycling rate exceeds 90%, aligning with green and low-carbon building concepts.

II. Application Forms of the Foundation Steel Frame

Depending on the type of prefabricated house, the steel frame has diverse application forms:

1. Steel Structure Residential Buildings: These adopt steel frame, steel frame-brace, or steel frame-core tube systems. Frame columns often use profiled steel or concrete-filled steel tubular columns, beams use profiled steel beams, and floor systems include composite slabs or steel truss decking. For instance, Baotou Wanjun Metropolis and Hangzhou Qianjiang Century City Talent Special Housing both adopt such structures.
2. Post-Earthquake Recoverable Systems: Combining steel frame-brace structures with prefabricated components (such as steel-ribbed prestressed concrete composite slabs), these achieve over 90% prefabrication rates. Replaceable buckling-restrained beam-column nodes and energy-dissipating elements significantly shorten post-earthquake repair times.
3. Fully Prefabricated and Detachable Structures: For example, a two-story prefabricated steel structure villa in Tangshan, Hebei Province, adopts a hidden steel frame panel structure with integrated wall, column, and beam design. The foundation consists of prefabricated independent column bases, with bolted node connections, offering short construction periods and high standardization.

III. Advantages of the Foundation Steel Frame

1. High Construction Efficiency: Modular construction can reduce project durations by 30%-50%. For example, the main frame of a two-story building can be completed in just a few days.
2. Outstanding Seismic Performance: Steel's ductility absorbs seismic energy, and combined with technologies like buckling-restrained braces, repair costs are low. Projects such as Luoyang Xinqianglian Office Building have validated its reliability.
3. Improved Space Utilization: Hidden frame technology resolves issues of protruding beams and columns, enabling more flexible layouts suitable for residential and villa scenarios.
4. Significant Environmental Benefits: Reduces construction waste and enables material recycling, driving the transformation toward industrialized construction.