CN110096806A - A kind of simple algorithm of determining CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li - Google Patents
A kind of simple algorithm of determining CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li Download PDFInfo
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- CN110096806A CN110096806A CN201910362549.8A CN201910362549A CN110096806A CN 110096806 A CN110096806 A CN 110096806A CN 201910362549 A CN201910362549 A CN 201910362549A CN 110096806 A CN110096806 A CN 110096806A
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- 238000010276 construction Methods 0.000 title claims abstract description 20
- 238000004422 calculation algorithm Methods 0.000 title claims abstract description 11
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 19
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001839 systemic circulation Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
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- Pure & Applied Mathematics (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention provides the simple algorithms of determining CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li a kind of, belong to technical field of bridge engineering.The algorithm is on the basis of forward iteration method, overcome the cumbersome difficulty for calculating complexity of determining CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li, software can be analyzed in conjunction with existing structure, secondary development is carried out without programming or to existing software, this method is easy to operate, clear concept has very high validity and practicability.
Description
Technical field
The invention belongs to technical field of bridge engineering, and in particular to a kind of simplicity of determining CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li
Algorithm.
Background technique
Cable-stayed bridge is as high order statically indeterminate structure, using the construction method being gradually completing stage by stage.The knot of final Cheng Qiaohou
Structure dead load internal force and main beam linear and work progress are closely related, and stayed-cable bridge structure system and loading status be all in the construction process
Constantly variation, so structural internal force and deformation also constantly change therewith.It therefore must construction simulation process in design calculating
In each process, determine reasonable Construction State, cable-stayed bridge Cheng Qiaohou made to reach reasonable finished dead state.
After completing the design of cable-stayed bridge reasonable finished dead state, it should determine rationally to apply according to construction method and specific process
Suspension cable initial tension under work state.Determine that the method for reasonable construction state mainly tears method open at present, formal dress-tears iterative method open
And stress-free state method, tear method open has uneven rod end power to influence removing closure segment often, due to concrete shrinkage, creep with
And geometric nonlinear, when construction procedure is more complicated, it is difficult to be closed, be difficult to acquire more accurate solution;Formal dress iteration
Method analyzes the reasonable construction drag-line initial tension of determining bridge and linear using the sequence of systemic circulation, and this method approximate can only consider
Concrete shrinkage, the geometrical non-linearity crept with structure, calculate comparatively laborious, heavy workload, and convergence rate is slow;Unstress state
Method application is more difficult, inconvenient for operation.
Summary of the invention
To solve the above problems, the invention discloses the simple algorithm of determining CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li a kind of, behaviour
Make simplicity, clear concept, calculation amount is small, and error is small, practical.
In order to achieve the above objectives, technical scheme is as follows:
A kind of simple algorithm of determining CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li, comprising the following steps:
Step 1 drafts one group of initial tensioning Suo Li { T0};
Step 2 establishes finite element model, carries out forward-analysis method according to work progress, obtains structure bridge completion state Suo Li
{F0};
Step 3, by calculated result compared with reasonable finished dead state, Suo Liwei { N } under reasonable finished dead state, calculating is not closed
Measure { Δ F0}={ N }-{ F0};
Step 4 adjusts initial tensioning Suo Li, the initial tensioning Suo Liwei { T of next round input1}={ T0}+{ΔF0};
Step 5 starts new round iterative calculation, in initial tensioning Suo Li { T1Under the action of, it is drawn when calculating to bridge completion state
Suo Liwei { F1, { F1And { N } between difference be { Δ F1}={ N }-{ F1};
Step 6 repeats step 4~step 5, until
The beneficial effects of the present invention are:
1, the present invention combines forward iteration method, determines to obtain the simple algorithm of CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li a kind of.
2, it the present invention overcomes determining that CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li is cumbersome to calculate complicated difficulty, can combine
Existing structure analyzes software, carries out secondary development without programming or to existing software, this method is easy to operate, and concept is clear
It is clear, it constantly computes repeatedly, precision is high, there is very high validity and practicability.
Detailed description of the invention
Fig. 1 is the flow chart present invention determine that the simple algorithm of CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.
The simple algorithm of determining CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li provided by the invention, includes the following steps: to draft first
Initial tensioning Suo Li obtains bridge completion state Suo Li by just intending Suo Li forward-analysis method, according to bridge completion state Suo Li and rationally at bridge like
The not closing capacity of state Suo Li is adjusted initial tensioning Suo Li, and iterative calculation makes bridge completion state Suo Liyu reasonable finished dead state rope
Power matches.As shown in Figure 1, specific steps are as follows:
Draft initial tensioning Suo Li { T0(rational bridging cable force usually can be used directly);
Forward-analysis method, which is carried out, according to the work progress of cable-stayed bridge (is included in geometrical non-linearity, concrete shrinkage, the shadows such as creep
Ring), obtain structure bridge completion state Suo Li { F0};
By calculated result compared with reasonable finished dead state, Suo Liwei { N } under reasonable finished dead state calculates not closing capacity { Δ
F0}={ N }-{ F0};
Adjust initial tensioning Suo Li, the initial tensioning Suo Liwei { T of next round input1}={ T0}+{ΔF0};
Start new round iterative calculation, in initial tensioning Suo Li { T1Under the action of, drag-line power is when calculating to bridge completion state
{F1, { F1And { N } between difference be { Δ F1}={ N }-{ F1};
Iteration calculating process, until
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution composed by arbitrarily being improved by the above technical characteristic.
Claims (1)
1. a kind of simple algorithm of determining CONSTRUCTION OF CABLE-STAYED BRIDGE initial tensioning Suo Li, it is characterised in that: the following steps are included:
Step 1 drafts one group of initial tensioning Suo Li { T0};
Step 2 establishes finite element model, carries out forward-analysis method according to work progress, obtains structure bridge completion state Suo Li { F0};
Step 3, by calculated result compared with reasonable finished dead state, Suo Liwei { N } under reasonable finished dead state calculates not closing capacity
{ΔF0}={ N }-{ F0};
Step 4 adjusts initial tensioning Suo Li, the initial tensioning Suo Liwei { T of next round input1}={ T0}+{ΔF0};
Step 5 starts new round iterative calculation, in initial tensioning Suo Li { T1Under the action of, drag-line power is when calculating to bridge completion state
{F1, { F1And { N } between difference be { Δ F1}={ N }-{ F1};
Step 6 repeats step 4~step 5, until
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110414179A (en) * | 2019-08-07 | 2019-11-05 | 深圳市市政设计研究院有限公司 | A kind of the cable body damage monitoring method and system of the drag-line class bridge that main longitudinal grider is set |
CN110700072A (en) * | 2019-11-08 | 2020-01-17 | 中国矿业大学 | Method for installing stay cable of cable-stayed bridge reduced scale test model |
Citations (2)
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---|---|---|---|---|
CN101937485A (en) * | 2010-10-11 | 2011-01-05 | 武汉理工大学 | Determination method of initial completion initial cable force of cable-stayed bridge |
CN105568864A (en) * | 2016-03-02 | 2016-05-11 | 东北林业大学 | Integrated algorithm for determining reasonable construction cable force of cable-stayed bridge |
-
2019
- 2019-04-30 CN CN201910362549.8A patent/CN110096806A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101937485A (en) * | 2010-10-11 | 2011-01-05 | 武汉理工大学 | Determination method of initial completion initial cable force of cable-stayed bridge |
CN105568864A (en) * | 2016-03-02 | 2016-05-11 | 东北林业大学 | Integrated algorithm for determining reasonable construction cable force of cable-stayed bridge |
Non-Patent Citations (1)
Title |
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张群等: "基于正装迭代法的三塔结合梁斜拉桥计算分析", 《土木工程与管理学报》 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110414179A (en) * | 2019-08-07 | 2019-11-05 | 深圳市市政设计研究院有限公司 | A kind of the cable body damage monitoring method and system of the drag-line class bridge that main longitudinal grider is set |
CN110414179B (en) * | 2019-08-07 | 2022-10-18 | 深圳市市政设计研究院有限公司 | Cable body damage monitoring method and system for inhaul cable type bridge with main longitudinal beam |
CN110700072A (en) * | 2019-11-08 | 2020-01-17 | 中国矿业大学 | Method for installing stay cable of cable-stayed bridge reduced scale test model |
CN110700072B (en) * | 2019-11-08 | 2021-03-26 | 中国矿业大学 | Method for installing stay cable of cable-stayed bridge reduced scale test model |
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