CN107975137B - Method for adjusting tensile force of reinforced concrete floor in inclined column structure system - Google Patents

Method for adjusting tensile force of reinforced concrete floor in inclined column structure system Download PDF

Info

Publication number
CN107975137B
CN107975137B CN201710253968.9A CN201710253968A CN107975137B CN 107975137 B CN107975137 B CN 107975137B CN 201710253968 A CN201710253968 A CN 201710253968A CN 107975137 B CN107975137 B CN 107975137B
Authority
CN
China
Prior art keywords
floor
construction
post
column
cast strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710253968.9A
Other languages
Chinese (zh)
Other versions
CN107975137A (en
Inventor
赵天文
杨霄
苗磊
庄艺斌
董以强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Architectural Design and Research Institute of Tsinghua University
Original Assignee
Architectural Design and Research Institute of Tsinghua University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Architectural Design and Research Institute of Tsinghua University filed Critical Architectural Design and Research Institute of Tsinghua University
Priority to CN201710253968.9A priority Critical patent/CN107975137B/en
Publication of CN107975137A publication Critical patent/CN107975137A/en
Application granted granted Critical
Publication of CN107975137B publication Critical patent/CN107975137B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/20Design optimisation, verification or simulation
    • G06F30/23Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]

Abstract

The invention relates to a method for adjusting the tensile force of a reinforced concrete floor in an inclined column structure system, and belongs to the field of reinforced concrete structures. Aiming at the defects in the design and construction of the concrete floor in the existing inclined column structure system, a method combining the design and construction is provided, the thought of fully utilizing the performance of concrete materials is adopted, and a post-pouring belt is arranged on the floor on the tension side of the inclined column, so that the transmission path of horizontal force in the floor is changed, the problem of overlarge tension in the floor in the inclined column structure system is effectively solved, the structure safety is ensured, and good economic benefit is obtained.

Description

Method for adjusting tensile force of reinforced concrete floor in inclined column structure system
Technical Field
The invention relates to the field of reinforced concrete structures, in particular to a design and construction method of a reinforced concrete floor in an inclined column structure system.
Background
With the progress of society and the development of economy, building models are more and more complicated, and inclined columns are more and more applied to building structures for the overall expression effect of buildings. The inclined column is different from the stress characteristic of the traditional straight column, horizontal force can be generated in a reinforced concrete floor structure connected with the inclined column, the material characteristic of concrete shows that the tensile force can be borne only by reinforcing steel bars in the floor, and the conventional design construction method is adopted, so that the using amount of the reinforcing steel bars in the floor is greatly increased, and great waste is caused.
Disclosure of Invention
The reinforced concrete inclined column structure system is different from the straight column structure system, under the action of vertical load, force can generate horizontal components at the column top and the column bottom, the horizontal components are transmitted by the reinforced concrete floor, and the larger the vertical load and the column slope are, the larger the horizontal force in the reinforced concrete floor is. The conventional design scheme is that the reinforcing steel bars of the floor are enlarged to meet the design requirements of the bearing capacity limit state and the normal use limit state, so that the use amount of the reinforcing steel bars is greatly increased for solving the problem of the tensile force of the floor, and the method is not economical and reasonable.
The invention provides a method for combining design and construction, aiming at the defects in the design and construction of a concrete floor in the existing inclined column structure system. The method can be applied to the structural form that both sides of the inclined column are provided with reinforced concrete floors, namely after the tension side support is cancelled, the stress characteristic of the inclined column is not changed, and the compression side structure can reliably transfer the horizontal force transmitted by the inclined column to the foundation. The method adopts the idea of fully utilizing the performance of concrete materials, and the post-cast strip is arranged in the floor system at the tension side of the batter post, so that the transmission path of the horizontal force in the floor system is commonly borne by the floor systems at the two sides of the batter post, and is only borne by the floor system at the compression side instead, thereby effectively relieving the problem caused by the tension in the floor system at the tension side in the batter post structure system.
A method for adjusting the tensile force of a reinforced concrete floor in an inclined column structure system specifically comprises the following steps:
(1) and determining the position of the post-cast strip arranged in the floor. The rear casting belt is arranged on the middle third part of the tensile side of the floor system connected with the inclined column, the influence on subsequent construction is considered to be reduced as much as possible, the reinforcing steel bars in the rear casting belt are not communicated, the arrangement of the rear casting belt can change the sequence of rigidity formation of the floor system on two sides of the inclined column, the rigidity of the floor system on the compression side is formed before the floor system on the tension side, and the hydraulic power generated by the inclined column in the floor system is mainly born by the concrete floor system on the compression side.
(2) According to the construction scheme, the closing time of the post-cast strip of the floor is analyzed, and the magnitude of the released horizontal force is influenced. The general construction sequence is that the main concrete structure is constructed, then the upper auxiliary steel structure is installed, the construction of the structural stress member is finished, and then the secondary structure construction, the outer vertical face curtain wall construction and the interior decoration construction are carried out. The later time of pouring the post-cast strip is then the more big the superstructure pulling force of release just also, and the influence to construction organization and construction progress is also big simultaneously. According to the construction scheme, the construction period and other factors, and according to different post-cast strip closed time nodes, a plurality of feasible schemes are listed.
(3) And (5) performing construction simulation analysis. And (3) carrying out construction simulation analysis by adopting finite element software according to the calculation conditions determined in the steps (1) and (2), analyzing and comparing the structural calculation models of all schemes, and comparing the internal force and the reinforcement of the structural member. Factors such as the using amount of reinforcing steel bars, the construction period, engineering management and the like are comprehensively considered, and the optimal post-cast strip closing time is determined under the condition that the safe, economical and reasonable principle is met.
(4) And finishing the structural design according to the result of the construction simulation analysis.
(5) And (4) constructing according to a design result, reserving a post-cast strip according to the design result in the construction, and closing the post-cast strip according to the required time node strictly.
By arranging the post-pouring belt, firstly, for a structure which cannot meet the design requirement in the conventional design, the internal force of a member is reduced by adjusting the construction stage, so that the member can meet the design requirement, and a method for solving the design problem by adopting a construction method is achieved;
through the arrangement of the post-cast strip, the force transmission path of the structural member is adjusted, the tensile force in the floor is reduced, the pressure in the floor is increased, and the performance of the concrete material is fully exerted.
As most of the pulling force is released, the structure is not easy to crack in the using process, and the durability and the attractiveness of the structure in the using stage are ensured.
Due to the reduction of the tensile force, the reinforcing bar distribution amount of the reinforcing bars in the concrete floor is reduced, the engineering cost is reduced, and the concrete floor has better economic benefit.
Drawings
FIG. 1 is a plan view of a batter post construction system and the location of post-cast strip placement in accordance with the present invention;
FIG. 2 is a cross-sectional view of the oblique-column architecture, i.e., the section A-A in FIG. 1;
fig. 3 is a flow chart of the present invention.
Reference numerals:
1 post-pouring a belt;
2, inclined columns;
3, a tension side floor system;
4, building cover at the compression side;
5 Ring beam (Upper steel structure support)
6, an upper steel structure spherical shell.
The specific implementation mode is as follows:
the method of the present invention will be described in detail by taking a reinforced concrete frame shear wall structure with batter posts as an example.
This example is a theatre project, one underground layer, with a reinforced concrete body structure height of 34.60 m. 12 inclined columns are arranged in the entrance hall of the theater along the 1-2 shaft collar directions, a reinforced concrete ring beam is arranged at the 12.00 elevation of the top of each inclined column, and an upper steel structure single-layer spherical shell support is arranged on the ring beam, as shown in fig. 1 and fig. 2.
The method for adjusting the internal tension of the underground roof slab of the engineering example comprises the following steps:
(1) and arranging a post-cast strip. The inclined column inclines towards the inside of the main body structure, the inclined column generates horizontal thrust on the main body structure under the action of vertical load at the position of a 12.00-level ring beam at the top of the column, the inclined column at the bottom of the column generates tensile force and pressure on a floor system at the top of a basement respectively, the floor system at the inner side of a shaft 1-2 is a tensile side floor system, an arc-shaped post-pouring belt is arranged at the position where the stress of the floor system is relatively small, namely the position of a span 1/3, the steel bars are not communicated, and the tensile force.
(2) And sealing the post-cast strip. According to the construction scheme of the project, three feasible schemes are available, and the time nodes for sealing the post-cast strip are respectively as follows: scheme 1, completing the main structure; scheme 2, the installation of the upper steel structure spherical shell is completed; scheme 3 completes interior and exterior decoration construction.
(3) Carrying out construction simulation analysis on the engineering example, respectively calculating three post-cast strip sealing schemes, comparing the internal force of a tensioned floor in each model, and analyzing to obtain that the concrete structure above the engineering batter post has fewer floors and the main load is transmitted from the upper steel structure spherical shell, wherein the scheme 1 only releases the horizontal force generated by the self weight of the upper concrete structure, and the internal tension of the floor is reduced a little; the 3 rd scheme can release the tensile force in the floor to the maximum extent, but the scheme has overlarge influence on the construction progress and field management, and the 2 nd scheme is adopted for comprehensively considering that the post-cast strip is closed after the installation of the upper steel structure spherical shell is finished, and the floor tensile force generated by the self weight of the upper concrete structure and the steel structure is released.
(4) And adjusting the structural design according to the analysis result, finishing the structural design according to the final calculation result, and emphasizing the closing time and the method of the post-cast strip in the corresponding construction drawing.
(5) And (4) formulating a corresponding construction scheme according to design requirements, sealing the arc-shaped post-cast strip after the upper steel structure is installed, and finishing interior and exterior decoration construction.

Claims (2)

1. A method for adjusting the tensile force of a reinforced concrete floor in an inclined column structure system is characterized in that: the method specifically comprises the following steps:
(1) determining the position of the post-cast strip arranged in the floor: the rear casting belt is arranged on the middle third part of the tensile side of the floor system connected with the inclined column, the position of the rear casting belt is considered to reduce the influence on the subsequent construction as much as possible, the steel bars in the rear casting belt are not communicated, the arrangement of the rear casting belt can change the sequence of the rigidity formation of the floor system on two sides of the inclined column, so that the rigidity of the floor system on the compression side is formed before the floor system on the tension side, and the hydraulic power generated by the inclined column in the floor system is mainly born by the concrete floor system on the compression side;
(2) analyzing the closing time of the post-cast strip of the floor according to the construction scheme, which influences the magnitude of the released horizontal force; the construction sequence is that the construction of a main body concrete structure is carried out firstly, then the installation of an upper auxiliary steel structure is carried out, the construction of a structural stress member is finished, and then the construction of a secondary structure, the construction of an outer vertical face curtain wall and the construction of indoor decoration are carried out, the later the post-cast strip pouring time is, the greater the released tensile force of the floor system is, and the greater the influence on the construction organization and the construction progress is;
(3) construction simulation analysis: adopting finite element software to perform construction simulation analysis according to the calculation conditions determined in the steps (1) and (2), analyzing and comparing the structural calculation models of all schemes, and comparing the internal force and the reinforcement of the structural member; comprehensively considering the using amount of reinforcing steel bars, the construction period and the engineering management, determining the closing time of the post-cast strip under the condition of meeting the safe, economical and reasonable principle, namely closing the post-cast strip after the installation of the upper steel structure spherical shell is finished, and releasing the tensile force of the floor system generated by the self weight of the upper concrete structure and the steel structure;
(4) according to the result of the construction simulation analysis, completing the structural design;
(5) and (4) constructing according to a design result, reserving a post-cast strip according to the design result in the construction, and closing the post-cast strip according to the required time node strictly.
2. The method for adjusting the tensile force of a reinforced concrete floor in an inclined column structural system according to claim 1, wherein the method comprises the following steps: the method specifically comprises the following steps:
(1) arranging a post-pouring belt; the inclined column inclines towards the inside of the main body structure, the inclined column generates horizontal thrust on the main body structure under the action of vertical load at the ring beam with the height of 12.00 meters at the top of the column, the inclined column at the bottom of the column generates tension and pressure on the floor system at the top of the underground chamber respectively, the floor system at the inner side of the 1-2 shaft is a tension side floor system, an arc-shaped post-pouring belt is arranged at the position with relatively small stress of the floor system, namely the position with the span 1/3, the steel bar is not communicated, and the tension in the floor;
(2) sealing the post-cast strip; according to the construction scheme of the project, three feasible schemes are available, and the time nodes for sealing the post-cast strip are respectively as follows: scheme 1, completing the main structure; scheme 2, the installation of the upper steel structure spherical shell is completed; scheme 3, finishing internal and external decoration construction;
(3) carrying out construction simulation analysis on the engineering example, respectively calculating three post-cast strip sealing schemes, comparing the internal force of a tensioned floor in each model, and analyzing to obtain that the concrete structure above the engineering batter post has fewer floors and the main load is transmitted from the upper steel structure spherical shell, wherein the scheme 1 only releases the horizontal force generated by the self weight of the upper concrete structure, and the internal tension of the floor is reduced a little; the 3 rd scheme can release the pulling force in the floor to the maximum extent, but the scheme has overlarge influence on the construction progress and field management, and the 2 nd scheme is adopted for comprehensively considering that the post-cast strip is closed after the installation of the upper steel structure spherical shell is finished, and the floor pulling force generated by the self weight of the upper concrete structure and the steel structure is released;
(4) according to the analysis result, structural design adjustment is carried out, structural design is completed according to the final calculation result, and the sealing time and the method of the post-cast strip are emphasized in the corresponding construction drawing;
(5) and (4) formulating a corresponding construction scheme according to design requirements, sealing the arc-shaped post-cast strip after the upper steel structure is installed, and finishing interior and exterior decoration construction.
CN201710253968.9A 2017-04-18 2017-04-18 Method for adjusting tensile force of reinforced concrete floor in inclined column structure system Active CN107975137B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710253968.9A CN107975137B (en) 2017-04-18 2017-04-18 Method for adjusting tensile force of reinforced concrete floor in inclined column structure system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710253968.9A CN107975137B (en) 2017-04-18 2017-04-18 Method for adjusting tensile force of reinforced concrete floor in inclined column structure system

Publications (2)

Publication Number Publication Date
CN107975137A CN107975137A (en) 2018-05-01
CN107975137B true CN107975137B (en) 2020-01-21

Family

ID=62012189

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710253968.9A Active CN107975137B (en) 2017-04-18 2017-04-18 Method for adjusting tensile force of reinforced concrete floor in inclined column structure system

Country Status (1)

Country Link
CN (1) CN107975137B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110485612B (en) * 2018-05-21 2021-12-21 深圳市建筑设计研究总院有限公司 Method for fixing building roof structure and device for realizing same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102322142A (en) * 2011-06-16 2012-01-18 永升建设集团有限公司 Construction method for 45-DEG-inclined long-overhanging reinforced concrete structure project
CN102704606A (en) * 2012-04-04 2012-10-03 中国航空规划建设发展有限公司 Method for regulating floor slab tension in overhanging steel-concrete composite floor
CN103556826A (en) * 2013-11-18 2014-02-05 山东万鑫建设有限公司 Construction method of post-cast strip area and floor area supporting systems on two sides of post-cast strip area
JP2015030985A (en) * 2013-07-31 2015-02-16 東急建設株式会社 Design method of composite structure
CN105019656A (en) * 2015-08-07 2015-11-04 山东金城建设有限公司 Construction method for floor system concrete post-cast strip suspended formwork
CN205224266U (en) * 2015-12-17 2016-05-11 江苏苏博特新材料股份有限公司 Overlength super large area bottom plate post -cast strip structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102322142A (en) * 2011-06-16 2012-01-18 永升建设集团有限公司 Construction method for 45-DEG-inclined long-overhanging reinforced concrete structure project
CN102704606A (en) * 2012-04-04 2012-10-03 中国航空规划建设发展有限公司 Method for regulating floor slab tension in overhanging steel-concrete composite floor
JP2015030985A (en) * 2013-07-31 2015-02-16 東急建設株式会社 Design method of composite structure
CN103556826A (en) * 2013-11-18 2014-02-05 山东万鑫建设有限公司 Construction method of post-cast strip area and floor area supporting systems on two sides of post-cast strip area
CN105019656A (en) * 2015-08-07 2015-11-04 山东金城建设有限公司 Construction method for floor system concrete post-cast strip suspended formwork
CN105019656B (en) * 2015-08-07 2017-04-12 山东金城建设有限公司 Construction method for floor system concrete post-cast strip suspended formwork
CN205224266U (en) * 2015-12-17 2016-05-11 江苏苏博特新材料股份有限公司 Overlength super large area bottom plate post -cast strip structure

Also Published As

Publication number Publication date
CN107975137A (en) 2018-05-01

Similar Documents

Publication Publication Date Title
CN101429869B (en) Double-bending tunnel
CN103362317B (en) Story adding and stair adding structure of existing masonry building, and construction method thereof
CN105839823B (en) A kind of hollow superposed floor of close rib of truss-like
CN109469202A (en) A kind of prestressing force assembled integral concrete frame structure system and its construction method
KR101626428B1 (en) Manufacturing Method for Hollow Precast Concret-encased Steel Column and Dry-splicing Methods for the Same
CN108086693A (en) A kind of assembled steel reinforced concrete frame structure system method of construction of low multilayer
CN103498570A (en) Floor-adding transformation structure inside old factory building and construction method thereof
CN103088749A (en) Deck type open shoulder arch bridge and constructing method thereof
CN103643634A (en) Anchoring structure for arch spring of concrete-filled steel tube arch bridge
CN107975137B (en) Method for adjusting tensile force of reinforced concrete floor in inclined column structure system
CN103603435A (en) Assembled concrete seismic beam-column frame and construction method thereof
CN106703197A (en) Longspan multilayer anti-seismic frame structure system and construction method thereof
CN105040813B (en) The preceding facade system in aluminium alloy house
CN106088657A (en) The ruggedized construction of a kind of rowlock wall body and construction method thereof
CN109610707A (en) A kind of design and rapid constructing method of prefabricated girder steel and floor fit flush
CN103966953A (en) Large-span concrete beam construction method based on unbonded steel strand prestress post-tensioning
CN203583674U (en) Assembly type concrete anti-seismic beam column framework
CN202208986U (en) Bidirectional prestressed hollow floor for malting tower
CN103758282A (en) Lattice type steel reinforced concrete superposed beam
CN205894732U (en) Reinforced structure of rowlock wall body
KR20150138785A (en) Vertical expansion remodeling method of existing building with seperate load path
CN105297892B (en) A kind of construction method of the beams of concrete cross connecting structure provided with tension reinforcing steel bar
CN108104264A (en) A kind of concrete frame-light gauge cold-formed steel shape mixed structure housing building system
CN107090835A (en) The construction method of preassembling support beam combined system
CN203701272U (en) Assembling type stiffness combined frame supporting structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant