ECC材料对混凝土框架结构倒塌安全储备的提升作用

发布时间：2018-05-13 13:13

本文选题：ECC + 混凝土结构　；参考：《应用基础与工程科学学报》2014年03期

【摘要】：结构的倒塌安全储备能力不仅与结构设计规范、施工方式以及场地地震风险等因素有关,而且还与结构所选用的材料密切相关.由于普通混凝土的低延性特点,地震中结构的破坏多发生于梁柱构件的端部,考虑到ECC材料超高韧性的特点,本文采用ECC材料少量替换梁柱构件端部的普通混凝土,以减小地震中结构的损伤.通过对普通框架和ECC材料局部替换后框架结构的抗震性能对比,研究局部使用ECC材料对结构倒塌安全储备能力的提升作用.分析表明,少量ECC材料替换混凝土后构件其它部位的混凝土得到了充分的利用,结构的倒塌安全储备能力较普通框架有较为明显的提升;并且,少量ECC替换后对结构的振动特性影响很小.
[Abstract]:The collapse safety reserve capacity of the structure is not only related to the structural design code, construction mode and site seismic risk, but also closely related to the materials selected for the structure. Due to the characteristic of low ductility of ordinary concrete, the damage of structure in earthquake occurs mostly at the end of Liang Zhu member. Considering the characteristic of ultra-high toughness of ECC material, this paper uses a small amount of ECC material to replace ordinary concrete at the end of Liang Zhu member. In order to reduce the damage to the structure in the earthquake. By comparing the seismic behavior of the frame structure partially replaced with the ECC material, the effect of local use of ECC material on the safety reserve capacity of the structure collapse is studied. The analysis shows that the concrete in other parts of the member is fully utilized after replacing the concrete with a small amount of ECC material, and the collapse safety reserve ability of the structure is obviously improved than that of the common frame. A small amount of ECC replacement has little effect on the vibration characteristics of the structure.
【作者单位】：东北大学资源与土木工程学院;大连理工大学土木工程学院;
【基金】：国家自然科学基金项目(90915005) 国家重点基础研究发展计划(973计划)项目(2013CB036305) 教育部新世纪优秀人才资助项目(NCET-08-0096)
【分类号】：TU375.4

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