论文部分内容阅读
公路桥梁橡胶支座比建筑橡胶支座更容易受到气候的影响,为了研究公路桥梁圆形氯丁橡胶支座在冻融循环后的力学性能,将圆形氯丁橡胶支座放入标准冻融试验箱中处理100次,而后对其进行轴心受压和抗剪试验,与标准试件进行对比分析,研究承载力、极限抗压和抗剪强度、竖向刚度、水平等效刚度、弹性模量等各项性能指标的变化。结果表明,圆形氯丁橡胶支座经过冻融循环处理,更易发生脆性破坏,破坏现象较标准试件更为严重。随着冻融程度的加深,圆形氯丁橡胶支座的极限承载力、极限抗压及抗剪强度、抗压及抗剪弹性模量都逐渐降低,整体稳定性变差。
In order to study the mechanical properties of round bridge neoprene bearing after freeze-thaw cycle, the round neoprene bearing is placed in the standard freeze-thaw After 100 times of treatment in the test chamber, the axial compressive and shear tests were carried out on the test specimens. Comparing with the standard specimens, the bearing capacity, ultimate compressive strength and shear strength, vertical stiffness, horizontal equivalent stiffness, Modulus and other performance indicators of change. The results show that the round neoprene bearing holder is more vulnerable to brittle failure after freeze-thaw cycle, and the damage phenomenon is more serious than the standard test piece. With the deepening of the degree of freezing and thawing, the ultimate bearing capacity, ultimate compressive strength and shear strength, compressive and shear modulus of circular neoprene bearings are gradually reduced, and the overall stability is deteriorated.