brace angle meaning in English

撑臂角铁
撑杆角材
撑杆角铁
角钢撑杆

In this test , a special bolt - jack is used to exent of prestressing force to brace angles as the whole structure is under dead - load . in this state brace angles withstand partly load before twice - load and the stress and strain of concrete are decreased . in this way the aim of removal of load and strengthening can be reached
本试验中采用专用螺栓千斤顶在恒定荷载水平下对混凝土柱角钢撑杆施加预压应力，使外包角钢在二次受力前即分担部分荷载，使混凝土应力水平和应变水平降低，达到卸载与加固同步进行的目的。