To each increment of load they respond with a definite change of stress and deformation . 對荷載的每個增量,應力的變形都有確定的變化。
The analyses of overloading and non - uniform distributed load show that the fatigue lives of asphalt pavement decrease rapidly for the increment of load and non - uniform distribution of load resulted from overload . therefore , it should be attached great importance to the limitation of overload 此外,本文還分析了車輛超載和荷載非均布的影響:隨著荷載的增加,再加上車輛超載造成的荷載非均布,瀝青路面的疲勞壽命下降很快。
The method , based on the finite element theory , force - method theory , increment method and middle stiffness method , making use of the increment of curvature of the section , works out the increment of load applying and is proved in this thesis 接著,本文根據(jù)有限單元和力法原理、增量法及中點剛度理論,提出了本文暫且命名為曲率力法的非線性分析方法。該方法通過增加截面的曲率來反求框架外加荷載的增量,并在文中以試驗的框架模型為例,給出了整個推導過程。
The following principles are proved : increasing cfp adhesive length will release the concentrating of shear stress near the cutoff point , this will lead to the increment of loading - bear capacity of concrete beams ; increasing the thickness of cfp will improve the transition of load from concrete beam to cfp , this is useful to exert the potential of cfp ; in creasing the anti - shear modulus of adhesive will result enhance the concentrating of shear stress , this is harmful to the effect of cfp reinforced concrete beams 本文的理論分析結(jié)果可以表明:增加碳纖維板的粘結(jié)長度可以緩解碳纖維板端部界面上的剪應力集中,改善混凝土梁結(jié)構(gòu)的加固效果;增大碳纖維板的粘結(jié)厚度可以增大界面上的剪應力,改善混凝土梁上載荷向碳纖維板的傳遞效果,有利于充分發(fā)揮碳纖維布的潛能;如果粘結(jié)膠層的抗剪模量過大會加劇剪應力的集中,從而對碳纖維加固的效果不利。