砌体墙的面内受弯损坏形态及其抗震优势实例剖析

Researches on in-plane flexural destruction modes and earthquake resistant advantages by way of representative examples

根据震害考察及试验现象研究,发现一些砌体墙的正截面受弯损坏形态,呈现出抗震性能好、受拉裂缝可逆和损坏后易修等特点,对砌体抗震墙平面内弯曲损坏形态的特点与剪切破坏进行了比较,剖析了弯曲型损坏在抗震性能、易修复性方面的优势;对砌体房屋、砌体构筑物、古建砖结构的承重墙体以及混凝土框架砌体填充墙的受弯开裂损坏形态进行了地震实例分析;对承重砌体墙的弯曲破坏形态进行了试验实例分析。研究指出,倡导砌体墙的弯曲型开裂是实现砌体结构高效防震防灾的一个重要途径,加强受弯开裂型式及剪切控制技术的创新研究,具有重要理论和应用意义。

Flexural destruction configuration on normal section of masonry wall is found during investigation of earthquakes disaster or experiment phenomena,which shows that seismic properties are outstanding,and tensile cracks are reversible and walls are easily repaired.Characteristics of shear failure are compared with those of flexural destruction,and advantages of flexural destruction over shear failure in respects of seismic properties and repairing feasibility are analyzed.Furthermore,flexural destruction configuration of masonry building walls,masonry special structure walls,ancient brick structure walls and masonry infilled walls in frame is demonstrated by way of representative earthquake examples together with experimental examples.It is pointed out that advocating flexural type of destruction is important approaches for masonry buildings to achieve protecting against and mitigating earthquake disasters,and that strengthening further innovative researches on flexural destruction configuration and shear failure control technology exhibits much theoretical and applied significance.