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管道支吊架的载荷计算方法!

来源:     发表日期: 2018-12-04 10:54:19     浏览次数:次    
  管道支吊架的垂直荷载和水平荷载是怎么计算的呢?荷载是使支吊架产生内力和变形的外力及其他因素。因此计算支吊架的荷载至关重要,那么如何去计算呢?荷载的作用方向为垂直方向和水平方向,因此也分为垂直荷载和水平荷载。支吊架所承受的荷载必须是符合标准的,否则负荷易发生问题。建筑结构设计时,对不同荷载应采用不同的代表值。
  How to calculate the vertical and horizontal loads of pipe support and hanger? Load is the external force and other factors that cause internal force and deformation of support and hanger. So it is very important to calculate the load of the support and suspension, so how to calculate it? The direction of load action is vertical and horizontal, so it can also be divided into vertical load and horizontal load. The loads borne by the support and hanger must be in accordance with the standards, otherwise the loads are prone to problems. In the design of building structures, different representative values should be adopted for different loads.
  何为垂直荷载?
  What is vertical load?
  也就是垂直方向所受到的作用力,可分为基本垂直荷载和可变垂直荷载。
  That is to say, the forces acting on the vertical direction can be divided into basic vertical loads and variable vertical loads.
  基本垂直荷载
  Basic vertical load
  管道支吊架所承受的管道重力、介质重力、保温层等附件的重力等永久性荷载。
  Pipeline support and hanger bears permanent loads such as pipeline gravity, medium gravity, insulation layer and other accessories.
  可变垂直荷载
  Variable vertical load
  管道所承受的活荷载、沉积物重力和发生地震时所应该承受的特殊变化的荷载。
  The live load, sediment gravity and the special variable load that the pipeline should bear when earthquake occurs.
  垂直荷载计算
  Vertical load calculation
  管道支吊架基本垂直荷载计算,可先将复杂的管道支架体系近似的看作简支梁,根据受力分析,管架B所承受的基本垂直荷载为GB=(GL1+ GL1)/2 因管道支吊架在一个工程里数量种类繁多,不可能一一计算,为此我们只需考虑同类型支架的不利受力状况即可,根据管道支吊架的大允许跨度来计算不利支架,此时就只需计算长度为大允许跨度L的管道、介质、保温层的重力GB即可。其重力方向的计算荷载为G=αGB (α=1.2~1.4)
  The basic vertical load calculation of pipeline support and hanger can be approximated as simply supported beam at first. According to force analysis, the basic vertical load borne by pipeline support B is GB=(GL1+GL1)/2. Because there are many kinds of pipeline support and hanger in a project, it is impossible to calculate them one by one. Therefore, we only need to consider the same type of pipeline support and hanger. According to the maximum allowable span of pipe support and hanger, the most disadvantageous support can be calculated. At this time, only the gravity GB of pipeline, medium and insulation layer with the maximum allowable span L can be calculated. The calculated load of gravity direction is G=alpha GB (alpha=1.2~1.4).
  何为水平荷载呢?
  What is the horizontal load?
  管道水平方向的荷载是作用在管架上的水平推力,根据支架类型可分为活动管架上的水平推力和固定管架上的水平推力。
  Horizontal load of pipeline is the horizontal thrust acting on the pipe rack. According to the type of support, it can be divided into the horizontal thrust on the movable pipe rack and the horizontal thrust on the fixed pipe rack.
  水平荷载计算
  Horizontal load calculation
  a.活动管架水平推力主要来自管道摩擦力,吊杆水平推力可忽略;水平推力即为管道摩擦力f=μG(μ为摩擦系数,G为管道垂直荷载)
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  A. Horizontal thrust of movable pipe rack mainly comes from pipeline friction, while horizontal thrust of suspender can be neglected. Horizontal thrust is pipeline friction f = mug (mu is friction coefficient, G is pipeline vertical load).
  b.固定支架的水平推力主要来自补偿器的弹性变形力。采用补偿器补偿的管道,其作用在固定管架上的水平推力为补偿器被压缩或拉伸所产生的反弹力。水平推力=补偿器反弹力T=ηΔL(η为补偿器的弹性模量,ΔL为补偿器发生的变形长度)
  B. The horizontal thrust of the fixed support mainly comes from the elastic deformation force of the compensator. The horizontal thrust acting on the fixed pipe rack is the rebound force produced by the compression or tension of the compensator. Horizontal thrust = compensator rebound force T = L (_is the elastic modulus of compensator and L is the deformation length of compensator)
  采用自然补偿的管道,是利用管道的自然弯曲形状所具有的柔性以补偿管道的热胀和冷缩位移。
  The pipeline with natural compensation utilizes the flexibility of the natural bending shape of the pipeline to compensate the thermal expansion and cold contraction displacement of the pipeline.
  固定支架变形管道长度为L,补偿臂管道长为Lb 管道安装温度按t1℃考虑,管道工作温度为t2℃,故钢管材质的管道会在温度变化下缩短ΔL=α×ΔT×L(式中α为钢管的线膨胀系数,ΔT为温差,L为固定支架变形管道长度),所以作用在管道补偿上的推力为T=3ΔLEI/Lb3(E为管道的弹性模量,I为管道的惯性矩)
  The length of deformed pipeline of fixed support is L, the length of compensating arm is Lb, and the working temperature of pipeline is t2, so the pipeline of steel pipe material will shorten L=alpha *T *L under the change of temperature (the linear expansion coefficient of steel pipe is alpha, the temperature difference is T, and the length of deformed pipeline of fixed support). Therefore, the function of the pipeline is to reduce the length of deformed pipeline of fixed support. The thrust on pipeline compensation is T=3 LEI/Lb3 (E is the elastic modulus of pipeline, I is the inertia moment of pipeline).
  以上就是管道支吊架的的垂直荷载和水平荷载计算方法,如果您有新萄京8522等产品需求,可以直接点击我们的官网进行咨询:/,我公司是专业的澳门新萄京8522,产品质量安全可靠,价格优惠,上千家企业合作商,值得信赖!
  Above is the calculation method of vertical load and horizontal load of pipeline support and hanger. If you have the demand of anti-seismic support and other products, you can directly click on our official website for consultation: /. Our company is a professional anti-seismic support manufacturer, the product quality is safe and reliable, the price is favorable, thousands of enterprises cooperate. Business, trustworthy!
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