裂缝 1.(裂开的缝儿) rent; rip; hiatus; tear; rift; crevice; crack; fissure 岩石的裂缝 crevices in a rock; 弥合裂缝 span a rift; 地上的裂缝 a fissure in the ground2.[地质学] fracture; rupture
约束 keep within bounds; restrain; bind; bound; boundage;tie; restraint; restriction; engagement; repress; constraint 约束自己 restrain oneself; 约束自己的感情 restrain one's feelings; 自我约束 self-discipline; self-control; 不受传统观念的约束 bound by no traditional idea; 打破[摆脱]一切约束 throw [shake; break] all restraint; 在法律和道德的约束下 be bound by legal and moral ties; 他受到自己诺言的严格约束。 he was bound hand and foot by his promise.; 约束力 force of constraint
Method of test for drying shrinkage cracking of restricted concrete 约束裂缝混凝土的干燥收断裂缝的试验方法
Steel fiber scatters stress converging in the area of the top end of tiny cracks , restrict the occurrence and development of cracks , diminishes the width of cracks , and enhances the integrity of concrete with the occurrence of cracks via the effect of felting between concrete and steel fiber , and consequently the strength of concrete that resists compression , tension , and shear force increases obviously , and the capability of concrete that resists compact , and fatigue , and the ductility and durability of fissured concrete improve 钢纤维削弱了混凝土微裂缝尖端的应力集中、限制并约束裂缝的产生和开展、减小裂缝宽度、尤其是通过粘结作用提高了裂后混凝土的整体性,从而使混凝土的抗拉、抗弯、抗剪强度显著提高,其抗冲击、抗疲劳、裂后韧性和耐久性也有较大程度的改善。