风积沙混凝土框架结构地震损伤试验研究

Many arid and semi-arid areas of central and western China are under serious threat of "desertification" .The tentacles of spreading deserts is aeolian sand. In order to promote the utilization of aeolian sand in frame structures, it is necessary to evaluate the seismic damage behavior of aeolian sand concrete frame structure scientifically and accurately. Firstly, low cycle loading test of aeolian sand concrete column specimens will be carried out in this project. Acoustic emission monitoring technology will be used in this test. Then, the influence law of mix proportion and design parameters on seismic damage behavior of column specimens will be studied. Seismic damage mechanism of column specimens will be revealed. The damage index model and damage evaluation method will be put forward. Besides, restoring force model, bearing capacity calculation model and seismic design suggestions of specimens will be gave through studying the seismic behavior index and the whole process of failure. Secondly, shaking table test of aeolian sand concrete frame structure models will be carried out in this project. Acoustic emission monitoring technology and incremental dynamic analysis will be used in this test. Then, seismic damage behavior of structure models will be analyzed and evaluated. The law of seismic damage evolution and failure mechanism of structure models will also be explored. Besides, the holistic damage index model and damage evaluation method will be put forward. The purpose of this project is to provide scientific basis for the engineering application of aeolian sand concrete frame structure.

我国中西部很多干旱、半干旱地区正面临“沙漠化”的严重威胁，而风积沙则是沙漠扩张的触手。为了推动风积沙在框架结构中得以利用，需要科学准确地评价风积沙混凝土框架结构的地震损伤性能。本项目首先通过风积沙混凝土框架柱的低周反复荷载试验研究，利用声发射监测技术，研究配合比（主要为风积沙取代率）和设计参数的变化对该框架柱地震损伤性能的影响规律，揭示其地震损伤机理，提出其损伤指数模型和损伤评估方法；通过分析框架柱的抗震性能指标和破坏全过程，建立其恢复力模型和承载力计算模型，给出其抗震设计建议。随后通过风积沙混凝土框架结构模型的模拟地震振动台试验研究，利用声发射监测技术和增量动力分析法，对该结构的地震损伤性能进行分析评估，探究其地震损伤演化规律、失效破坏机制，建立其整体损伤指数模型和损伤评估方法，为风积沙混凝土框架结构的工程应用提供科学依据。

我国中西部很多干旱、半干旱地区正面临“沙漠化”的严重威胁，而风积沙则是沙漠扩张的触手。为了推动风积沙在框架结构中得以利用，需要科学准确地评价风积沙混凝土框架结构的地震损伤性能。本项目首先通过风积沙混凝土框架柱的低周反复荷载试验研究，利用声发射监测技术，研究配合比（主要为风积沙取代率）和设计参数的变化对该框架柱地震损伤性能的影响规律，揭示其地震损伤机理，提出其损伤指数模型和损伤评估方法；通过分析框架柱的抗震性能指标和破坏全过程，建立其恢复力模型和承载力计算模型，给出其抗震设计建议。随后通过风积沙混凝土框架结构模型的模拟地震振动台试验研究，利用声发射监测技术和增量动力分析法，对该结构的地震损伤性能进行分析评估，探究其地震损伤演化规律、失效破坏机制，建立其整体损伤指数模型和损伤评估方法，为风积沙混凝土框架结构的工程应用提供科学依据。