Inner tensioning pre-stressed concrete double-layer I-shaped framework box-type structure
A concrete and prestressed technology, applied in the direction of structural elements, building components, building structures, etc., can solve the problems of poor durability, limited heavy-duty structures, poor crack resistance, etc., and achieve short construction period, good structural performance, The effect of low construction difficulty
Active Publication Date: 2013-09-11
BEIJING RAIL TRANSIT CONSTR MANAGEMENT +1
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Compared with the prestressed structure, this ordinary concrete structure has larger deformation, poor crack resistance, poor durability, and general economy, which limits the further application of long-span and heavy-duty structures.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] exist figure 1 , 2 , 4, 1 # The annular curved prestressed beam (1) is a plane closed curve, which is composed of 8 prestressed steel strands, laid 1 # Annular curve prestressed beam (1), will 1 # The tension groove (5) of the annular curved prestressed beam (1) is reserved on the side of the neutral axis near the third point of the top beam / bottom beam (9) of the frame. Groove (5) through the middle anchor (12) will 1 # Each segment of the annular curved prestressed beam (1) is connected in sequence from end to end, and then stretched at any stretching end (10, 11) of the intermediate anchorage, and after the stretching is completed, the stretching groove (5) is blocked as required. Can. 2 # Annular curve prestressed beam (2), positive and negative parabola 1 # The implementation mode of the prestressed bundle is basically the same as 1 # Ring curved prestressed beam (1).
[0022] exist figure 1 , 3 , 5, 3 # The annular curved prestressed beam (3) is a pl...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to an inner tensioning pre-stressed concrete double-layer I-shaped framework box-type structure of a building. A framework is arranged in the section direction to form a double-layer box-type section, the sections of peripheral framework beams are I-shaped, the span range of the peripheral framework beams is 7 to 36 meters, annular prestressed ribs are arranged in the peripheral framework, parabolic prestressed ribs are arranged in framework beams on the middle layer, and tensioning grooves are reserved on the lateral surfaces of beam web plates in the structure; and when concrete reaches the specified strength, the segments of the same prestressed ribs are sequentially connected end to end through middle anchors at the tensioning grooves and tensioned, and then the tensioning grooves are plugged. The structure is characterized in that the tensioning grooves are reserved on the sections of the I-shaped framework beams, and the prestressed ribs are connected through the middle anchors and tensioned. The structure has the advantages that when the ends of the structural member do not have tensioning and anchoring conditions, prestressed tensioning connection can be realized, high comfort degree, using performance and structural performance can be provided, and the structure is particularly suitable to be used as an underground heavy-duty and large-span double-layer framework box-type structure.
Description
Technical field [0001] The invention relates to a post-tensioned prestressed concrete double-layer I-frame box structure of a building, especially when the prestressed tendon tension and anchorage conditions are not available at the end of the frame, the side of the web plate of the concrete frame inside the structure Post-tensioned prestressed concrete double-layer I-frame box structure connected and tensioned with prestressed tendons. Background technique [0002] At present, the known post-tensioned prestressed concrete double-layer I-frame box structure is to install the casing, structural steel bars and parts for post-tensioned prestressed tendons to form holes, and then install the formwork and pour concrete. The prestressed tendons can be inserted into the casing first or later. After the concrete reaches the strength, the prestressed tendon is stretched to the required stress with a jack and anchored at both ends of the beam, and the precompressed stress is transmit...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/22E04C5/08
Inventor 魏怡刘明保宫剑飞郑文华康富中徐凌景月岭聂永明朱胜利吴林林乐贵平冯大斌于滨
Owner BEIJING RAIL TRANSIT CONSTR MANAGEMENT