On the basic of former research men ' s experience , 18 experimental members ( including 9 simple beams and 9 restrained beams ) are designed and tested . in the experiment , phenomena are observed and record by taking photos in the whole process from the first crack appears to test members crash completely , experimental data is attained including load values of crack - appear load , critical load and terminal load , stress values of reinforcing steel bar stress , compressed concrete stress and beam flank stress and values of deflection etc . by analyzing the crack ' s appearing and developing form and stress values of concrete and steel bars , the crash modes of test beams are defined ; shearing force - deflection curves are contrasted and analyzed ; the effects on shear strength of the three factors as shear span ratio , concrete strength and restraining moment are also analyzed 借鑒已有試驗的經(jīng)驗,本文設計和完成了對18根超高強混凝土無腹筋梁(包括9根簡支梁和9根約束梁)在集中荷載下抗剪強度的試驗,觀察了試件從裂縫出現(xiàn)到完全破壞失去承載能力全過程的試驗現(xiàn)象并通過拍照進行記錄,獲得了試件的斜裂縫出現(xiàn)荷載、臨界斜裂縫荷載和極限荷載等荷載值和縱筋應變、混凝土受壓應變和梁側混凝土應變等應變值以及撓度值等。