beam with simply supported ends meaning in Chinese

简支梁
筒支梁

In common design , the calculation of suspender inner force uses the model of beam with simply supported ends , because of all kinds of restraint
由于各种条件的限制，在通常的设计计算中，利用桥面简支梁模型计算吊索（杆）内力。
The calculation model of the first period dead load is beam with simply supported ends ; the calculation model of the second period dead load is continuous beam on elastic support
第一期恒载，计算模型为简支梁模型；第二期恒载以及活载，计算模型为弹性支承连续梁模型。