CN105930599A - 一种计算不同模板下预拌大体积混凝土温度场的方法 - Google Patents

一种计算不同模板下预拌大体积混凝土温度场的方法 Download PDF

Info

Publication number
CN105930599A
CN105930599A CN201610270906.4A CN201610270906A CN105930599A CN 105930599 A CN105930599 A CN 105930599A CN 201610270906 A CN201610270906 A CN 201610270906A CN 105930599 A CN105930599 A CN 105930599A
Authority
CN
China
Prior art keywords
calculating
different templates
under different
temperature field
field under
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.)
Pending
Application number
CN201610270906.4A
Other languages
English (en)
Inventor
朱平华
夏群
王新杰
吴坤鹏
贾佳佳
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.)
Changzhou University
Original Assignee
Changzhou 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 Changzhou University filed Critical Changzhou University
Priority to CN201610270906.4A priority Critical patent/CN105930599A/zh
Publication of CN105930599A publication Critical patent/CN105930599A/zh
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G06F2119/08—Thermal analysis or thermal optimisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Computational Mathematics (AREA)
  • Architecture (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Evolutionary Computation (AREA)
  • General Engineering & Computer Science (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

本发明公开了一种计算不同模板下预拌大体积混凝土温度场的方法，其特征在于应用所述关系表达式可以预测不同模板下预拌大体积混凝土温度场表面点和中心点的温度。该方法的预测表达式为：其中T为预测温度，t为龄期，A>0,峰值点(XC,TC),w为

Description

一种计算不同模板下预拌大体积混凝土温度场的方法
技术领域
本发明涉及大体积混凝土温度场计算方法，属于建筑结构分析计算技术领域。
背景技术
大体积混凝土在连续浇筑和硬化过程中,水泥水化反应产生大量水化热,由于混凝土热阻很大,热量聚集在内部不易散发,而表面散热较快,这样在混凝土内部和表层形成较大温差。混凝土内表温差、升降温变化加上环境因素如气候变化、拆模等的影响,导致不均匀温度变形和温度应力,一旦拉应力超过混凝土即时抗拉强度,就会在混凝土内部或表面产生裂缝。这种温度裂缝是混凝土早期开裂的主要因素之一,往往是贯穿性的有害裂缝,对结构的抗渗性、整体性、耐久性甚至承载能力十分不利。
为确保温度应力小于抗拉强度,避免温度裂缝产生,大体积混凝土结构施工过程中的温度控制和温度监测十分必要。
发明内容
本发明要解决大体积混凝土温度场温度控制的计算方法的不足，提供了一种计算不同模板下大体积预拌混凝土温度场的方法。
本发明拟合的预测表达式为：其中T为预测温度，t为龄期，A>0,峰值点(XC,TC),w为处的波宽。
适用于预测不同模板下预拌大体积混凝土温度场表面点和中心点的温度，其中不同模板包括：钢模板、竹模板、木模板。
作为对本发明的限定，本发明所述的预拌大体积混凝土为C40～C60的商品混凝土，其主要材料为：水泥采用P.0 42.5～P.0 52.5级水泥；S95级矿渣；粉煤灰采用Ⅱ级粉煤灰；粗骨料采用5～40mm连续级配的碎石；细骨料采用天然河砂；外加剂采用减水剂。
本发明的优点：
现行的相关研究多侧重于理论研究，本发明根据试验所测数据拟合出的关系表达式，方便预测大体积混凝土内外温度。为工程人员提供一定的帮助，具有一定的现实意义。
具体实施方式
本发明将就以下实施例作进一步说明，但应了解的是，这些实施例仅为例示说明之用，而不应被解释为本发明实施的限制。
实施例1
选用C40混凝土，最小截面尺寸为1m×1m，覆盖塑料薄膜自然养护，钢模板支承，采用表面点温度计算公式：
实施例2
选用C40混凝土，最小截面尺寸为1m×1m，覆盖塑料薄膜自然养护，钢模板支承，采用中心点温度计算公式：
实施例3
选用C40混凝土，最小截面尺寸为1m×1m，覆盖塑料薄膜自然养护，木模板支承，采用中心点温度计算公式：

Claims (6)

1.一种计算不同模板下大体积预拌混凝土温度场的方法，其特征在于应用所述关系表达式可以近似确定不同模板下预拌大体积混凝土温度场表面点和中心点的温度。该方法的预测表达式为：该方法的预测表达式为：其中T为预测温度，t为龄期，A>0,峰值点(XC,TC),w为处的波宽。
2.根据权利要求1所述的一种计算不同模板下大体积预拌混凝土温度场的方法，其特征在于所述的不同模板包括钢模板、竹模板、木模板。
3.根据权利要求1所述的一种计算不同模板下大体积预拌混凝土温度场的方法，其特征在于采用塑料薄膜进行养护。
4.根据权利要求1所述的一种计算不同模板下大体积预拌混凝土温度场的方法，其特征在于所述的钢模板下，计算表面点温度公式为：
计算中心点温度公式为：
T = 8.455 + 16821.376 252.840 π / 2 × e ( - 2 ( t - 156.415 ) 2 252.840 2 ) .
5.根据权利要求1所述的一种计算不同模板下大体积预拌混凝土温度场的方法，其特征在于所述的在竹模板下，计算表面点温度公式为：
计算中心点温度公式为：
T = 27.860 + 8966.050 194.351 π / 2 × e ( - 2 ( t - 95.238 ) 2 194.351 2 ) .
6.根据权利要求1所述的一种计算不同模板下大体积预拌混凝土温度场的方法，其特征在于所述的在木模板下，计算表面点温度公式为：
计算中心点温度公式为：
T = 17.516 + 9342.940 130.718 π / 2 × e ( - 2 ( t - 115.992 ) 2 130.718 2 ) .
CN201610270906.4A 2016-04-27 2016-04-27 一种计算不同模板下预拌大体积混凝土温度场的方法 Pending CN105930599A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610270906.4A CN105930599A (zh) 2016-04-27 2016-04-27 一种计算不同模板下预拌大体积混凝土温度场的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610270906.4A CN105930599A (zh) 2016-04-27 2016-04-27 一种计算不同模板下预拌大体积混凝土温度场的方法

Publications (1)

Publication Number Publication Date
CN105930599A true CN105930599A (zh) 2016-09-07

Family

ID=56837488

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610270906.4A Pending CN105930599A (zh) 2016-04-27 2016-04-27 一种计算不同模板下预拌大体积混凝土温度场的方法

Country Status (1)

Country Link
CN (1) CN105930599A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112609819A (zh) * 2020-11-11 2021-04-06 河海大学 一种混凝土构件及其温度控制方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006049717B3 (de) * 2006-10-13 2008-04-30 Friedrich-Schiller-Universität Jena Verfahren und Vorrichtung zur kontaktlosen Ermittlung der Temperatur an vorzugsweise unzugänglichen Orten sowie deren Verwendung
CN102721480A (zh) * 2012-06-27 2012-10-10 清华大学 基于冷却通水监测的计算大体积混凝土等效温度场的方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006049717B3 (de) * 2006-10-13 2008-04-30 Friedrich-Schiller-Universität Jena Verfahren und Vorrichtung zur kontaktlosen Ermittlung der Temperatur an vorzugsweise unzugänglichen Orten sowie deren Verwendung
CN102721480A (zh) * 2012-06-27 2012-10-10 清华大学 基于冷却通水监测的计算大体积混凝土等效温度场的方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
韩金生 等: ""钢管混凝土柱截面温度场的简化计算方法"", 《NATURAL SCIENCE》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112609819A (zh) * 2020-11-11 2021-04-06 河海大学 一种混凝土构件及其温度控制方法

Similar Documents

Publication Publication Date Title
Bofang Thermal stresses and temperature control of mass concrete
Corr et al. Digital image correlation analysis of interfacial debonding properties and fracture behavior in concrete
Yuvaraj et al. Support vector regression based models to predict fracture characteristics of high strength and ultra high strength concrete beams
Ha et al. Thermal crack control in mass concrete structure using an automated curing system
CN102296819A (zh) 一种大体积无降温管砼施工方法
Chen et al. Estimation of exposed temperature for fire-damaged concrete using support vector machine
CN103257153A (zh) 一种补偿混凝土膨胀加强带应力变化状态的监测方法
Zhang et al. Thermo-mechanical behavior simulation and cracking risk evaluation on steel-concrete composite girders during hydration process
CN104050387A (zh) 一种混凝土热膨胀系数预测模型的构建方法
Han et al. Numerical simulation investigation on hydration heat temperature and early cracking risk of concrete box girder in cold regions
CN105930599A (zh) 一种计算不同模板下预拌大体积混凝土温度场的方法
Choi et al. Modelling of creep of concrete mixed with expansive additives
Zhouc et al. Optimization of the temperature control scheme for roller compacted concrete dams based on finite element and sensitivity analysis methods
Cai et al. Early hydration heat temperature field of precast concrete T-beam under steam curing: Experiment and simulation
Aniskin et al. The use of ice to cool the concrete mix in the construction of massive structures
Buidens Effects of mix design using chloride-based accelerator on concrete pavement cracking potential
Wang et al. Measurement and evaluation of the thermal expansion coefficient of rock-filled concrete
Prayuda et al. Field investigation and finite element analysis on expansion and shrinkage strains of expansive concrete structures
Ruiz et al. Computer-based guidelines for concrete pavements: volume III, technical appendices.
Ye et al. Analysis of early-age mechanics and crack of the base plate on the bridge in summer based on eXtended FEM
Xu et al. Estimation of the thermal parameters of SCC and rockfill for rock-filled concrete
Gong et al. Multiscale modeling of environment-dependent heterogeneous media by a Thermo-Hydro-mechanical damage model
Liu et al. Study on temperature control and crack resistance of mass concrete anchorage in suspension bridge
Deng et al. Temperature self-controlled concrete: Electro-thermal performance and active temperature control strategy
Mizobuchi et al. Effect of heat elimination by pipe cooling system for temperature rise with heat of cement hydration in beam using high strength engineered Cementitious composites

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20160907