【作者】 侯丕吉；

【导师】 郑山锁；

【作者基本信息】 西安建筑科技大学 ， 结构工程， 2009， 硕士

【摘要】 地震作为一种破坏性极大的突发性自然灾害,瞬间的强烈震动就可能给一个现代化的城市带来毁灭性的冲击。近几年,地震对建筑结构所造成的损伤被各国科学家广泛研究。研究结果表明,损伤将造成结构构件力学性能的不断退化,同时,随着地震往复作用次数的增加,损伤不断积累。当累积损伤达到一定的程度后,将引起结构局部破坏或倒塌。型钢混凝土结构作为一种抗震性能良好的结构体系,它在地震中的行为为大家所关注。型钢混凝土框架柱作为SRC组合结构中的重要组成构件,首先应了解其损伤机理。本文基于13榀型钢高强高性能混凝土(SRHSHPC)框架柱的低周反复加载试验,得到压、弯、剪共同作用下柱的破坏形态、滞回曲线、骨架曲线,分析了剪跨比、混凝土强度和轴压比对SRHSHPC框架柱抗震性能的影响。在现有地震损伤模型的基础上,进而提出了基于变形和累积耗能非线性组合的地震损伤模型。计算出试验中SRHSHPC框架柱损伤指标随加载水平的变化,同时分析了轴压比、混凝土强度以及剪跨比对框架柱损伤的影响。最后通过地震损伤模型计算值与试验损伤值的对比分析,验证了本文所提出的SRHSHPC框架柱地震损伤模型的可行性。研究结果可为结构损伤分析,经济损失评估以及震后修复提供参考。更多还原

【Abstract】 The earthquake is a sudden natural disaster;the strong momentary shake can cause destructive effect on our city.In recent years,the damage generated in structures under earthquake is studied extensively by scientists.Due to the effect of damage,the mechanical property of structures and members will be degraded.The research results show that the damage gradually accumulates with the increase of cycle times of earthquake.Local destroy or collapse is generated,when the accumulative damage arrives at a certain extent.AS a good earthquake-resistance structure system,the seismic performance of Steel Reinforced Concrete(SRC) is studied by scientists.The SRC column is important seismic members for structure,so the damage mechanism of SRC columns should be known clearly.In this paper,failure pattern,hysteretic curves,skeleton curves of Steel Reinforced High Strength and High Performance Concrete(SRHSHPC) frame columns are obtained through experimental results of 13 specimens which are tested under low cyclic repeated loading.The effect of shear span ratio,concrete strength and axial compression ratio on seismic behaviors of SRHSHPC frame columns is analyzed. Based on existing seismic damage models,a new seismic damage model is put forward for SRHSHPC frame columns,which is a nonlinear combination of deformation and accumulative dissipation.The damage index of tentative SRHSHPC frame columns is compared under different loading cycle levels,and the effect of concrete strength,axial compression ratio and shear span ratio on damage of SRHSHPC frame columns is discussed.The comparison of the value of calculation obtained by damage model and the test results shows that the damage model established inhere supplies a good reference for seismic damage analysis of structure,estimation of economic loss and repair after earthquake.更多还原