Analysis of Contraction Stress and Thermal Stress in Arch Culverts

Evaluation of contraction stress due to temperature variation in buildings of mixed structures

混合结构建筑温度收缩应力的近似计算

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Sensitivity coefficient obtained from calculation can represent how much the internal temperature variation and contraction affects the early crack of concrete structure.

计算得到的敏感系数能够表示结构内部温度变化和收缩这两个因素对于混凝土结构早期开裂的影响程度。

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This paper introduces the features of the concrete, analyzes the types of concrete cracks, and sums up the causes of and control measures for the concrete cracks from the aspects of contraction crack, temperature crack and hydration heat crack.

介绍了混凝土的特性，分析了混凝土裂缝的种类，分别从收缩裂缝、温度裂缝、水化热裂缝等方面总结了混凝土裂缝产生的原因及其控制措施。

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The sorts and cause of cracks are analyzed from the aspect of contraction crack, temperature cracking and differential settlement cracking and the control measures are put forward on engineering design, materials, construction and maintenance etc.

阐述了混凝土裂缝的种类，从收缩裂缝、温度裂缝、不均匀沉降裂缝等方面论述了裂缝产生的原因，并从工程设计、材料、施工、养护等方面提出了裂缝控制的措施与方法。

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The article analyzes the feature of temperature contraction crack in super-long concrete structure and raises some design suggestion and measures to control and resist pressure of temperature contraction.

根据设计实践和体会，注重结构概念设计，简要分析了温度收缩裂缝的基本特点，重点分析了超长混凝土结构温度收缩裂纹及控制和抵抗温度收缩应力的具体设计建议与措施。

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A concrete contraction crack and preventive measures

水泥混凝土的收缩裂缝及防止措施

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A Brief Talk On Forepart Contraction Crack In Cement Concrete Road Surface

浅谈水泥混凝土路面早期收缩裂缝

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Discussion of Plastic Contraction Crack and Fault and Construction control

塑性收缩裂缝和断板的探讨及施工控制

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In order to solve the volume contraction after cement slurry curing and preclude cement plug fracture, a new oil well cement additive is developed and optimized.

为达到提高油水井打水泥塞施工有效率目的，采用在油水井水泥中加入添加剂来减少水泥浆稠化凝固后的体积收缩量及消除水泥塞裂缝。

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The application has proved that the riser design of cast inserted die was simple and practical with use of volume contraction principle, and the productivity increased effectively.

实践证明，应用体收缩法设计模具钢镶块铸件的冒口工艺简单、实用，有效地提高了生产效率。

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The activation energies for fruit peel, textile and board paper were lower, and their pyrolyses followed volume contraction mechanism.

而果皮、织物和纸板类的活化能较低，它们的热解符合体积缩小机理。

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To the dense sand, the reversibility of part of dilatation is the main reason of the volume contraction.

密砂的卸载体缩是剪胀可恢复的宏观体现。

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CONSTITUTIVE MODEL OF ROCK UNDER TRIAXIAL LOADING AND UNLOADING Research on Volume Contraction due to Triaxial Unloading in CD Test

岩石在三轴加卸荷过程中的一种本构模型研究排水三轴试验卸荷体缩现象的原因

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While the confining stress is large, strain hardening, volume contraction and lateral intrusion become prevalent.

高侧向应力状态时应变硬化，体缩和侧向收缩。

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Design of Insulated Riser of Cast Inserted Die Based on Principle of Volume Contraction of Freezing

基于体收缩原则的铸造模具镶块保温冒口设计研究

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By using acoustic methods, this paper studied the isotonic and isometric contraction of biceps under load to reveal the characteristics of sound production.

作者用声学法研究肱二头肌在负荷下等长、等张收缩、揭示其发声规律。

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Then we investigate two particular cooperative behaviors of cross bridges in muscle isotonic contraction ( in which the extern load F is constant):( 1) n 0 attached cross bridges work at the same tempo, the working process is not affected by the environment;

在此基础上，考察了横桥分子间的两种协作行为：（1）n0个处于接触状态的横桥分子同步的工作，其作功过程与外界影响无关；

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By means of isotonic contraction, we studied the enhancing effects of atractylodes macrocephala on the smooth muscle of mice small intestine.

以等长收缩的形式观察并记录了不同浓度的自术对小鼠小肠平滑肌收缩功能的影响。结果表明白术能显著增强小肠平滑肌收缩幅度、收缩频率，能显著延长小肠平滑肌在缺氧情况下的收缩时间。

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Objective To explore the effect of isotonic contraction exercise on cardiac function in patients with AMI.

目的研究分级等长收缩运动对急性心肌梗死（AMI）患者的心功能影响。

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Methods Isotonic contraction of vessel smooth muscle was recorded.

方法应用血管平滑肌等张收缩的方法。

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