| Deflection is one of the important contents of safety assessment of concrete flexural members,and its design method is based on structural analysis.A test-based structural design method,which is parallel to the structural analysis-based design method,is proposed in the development of structural design methods.This method introduces the component performance test into the specific design process,and directly determines the design value of component deflection according to the test results,which has remarkable demonstration and pertinence,and has better control effect than the previous design method.The research of structural design method based on test is limited to the limit state design of components,so it is necessary to extend it to the applicability design of components.In this study,combined with the structural design method,the deflection control method of concrete flexural members based on test is established,and the purpose is to infer the deflection design value of concrete flexural members according to the test results.The main research work includes: using the previous test-based design method to establish a test-based method to control the deflection of concrete flexural members.In the face of different situations in the design,such as different loads,incomplete statistics of influencing factors and insufficient sample size,the probabilistic characteristics of the deformation performance of concrete flexural members are revealed by probability analysis.It includes the coefficient of variation of deformation performance and the guarantee rate of deflection design value.In view of the fact that there are few test samples,a small sample inference method for the design value of deflection of concrete flexural members is established.Finally,the deflection control method of concrete flexural members based on test is put forward.The significance of the study is to expand the scope of application of the test-based structural design method and provide a more effective method for the deflection control of concrete flexural members. |
