Composite steel U-shaped anti-seismic steel frame and construction method thereof

Abstract

The invention relates to a composite steel U-shaped anti-seismic steel frame and a construction method thereof. The composite steel U-shaped anti-seismic steel frame comprises a composite steel tube frame in a U shape, wherein the composite steel tube frame comprises a stainless steel inner layer, a structural steel layer and a stainless steel outer layer which are sequentially arranged from the inside to the outside, the tube wall thickness of the structural steel layer is larger than that of the stainless steel inner layer and the stainless steel outer layer, the interior of the composite steel tube frame is filled with sea sand concrete, column feet are installed at two ends of the composite steel tube frame, the composite steel tube frame comprises two tube frame units which are symmetrically arranged on the left and the right, the column feet are welded at tail ends of vertical parts of the two tube frame units, outer ends of arc parts of the two tube frame units are connected through a memory alloy sleeve, and the column feet are anchored on the ground through T-shaped memory alloy anchor rods. The composite steel U-shaped anti-seismic steel frame is simple in structure, reasonable in design and capable of resisting large wind loads, and has good durability, economy and earthquake resistance.

Description

technical field [0001] The invention relates to a composite steel U-shaped anti-seismic steel frame and a construction method. Background technique [0002] CFST has the advantages of high bearing capacity, good ductility, and high rigidity, and is widely used in factory structures that directly bear dynamic loads (heavy duty cranes). However, there are the following problems when using this component in coastal areas: 1) The concentration of moisture and chloride ions in the air is high, and the external steel pipe is prone to corrosion. The general treatment method is to regularly apply anti-corrosion paint or use stainless steel pipes. The maintenance cost in its whole life cycle is high, and the price of stainless steel pipe is high, which will directly increase the construction cost of the structure; 2) River sand is one of the essential raw materials for making concrete, but river sand resources are about to be exhausted, At present, the price of river sand on the mar...

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Problems solved by technology

However, there are the following problems when using this component in coastal areas: 1) The concentration of moisture and chloride ions in the air is high, and the external steel pipe is prone to corrosion. The general treatment method is to regularly apply anti-corrosion paint or use stainless steel pipes. The maintenance cost in its whole life cycle is high, and the price of stainless steel pipe is high, which will directly increase the construction cost of the structure; 2) River sand is one of the essential raw materials for making concrete, but river sand resources are about to be exhausted, At present, the price of river sand on the market is about 300 yuan per square meter. The main solution is to purify the sea sand and reduce its chloride ion concentration, but the cost of sea sand desalination is relatively high, and it needs to consume a lot of fresh water resources; 3) in heavy Under the action of reciprocating loads such as working cranes, the main structure or joints are prone to fatigue damage, so it is necessary to take certain shock-absorbing and isolation measures

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