王凤来  唐岱新  朱本全     （哈尔滨工业大学土木工程学院  150090）

    张前国  李庆刚  薛宏伟     （辽宁省建筑设计研究院  沈阳 110005）

[提要]  框支墙梁是底层大开间框剪组合墙房屋中的关键构件，结合拟动力试验对其进行的静力和抗震性能研究表明，房屋的纵、横向托梁均与其上墙体形成墙梁结构，并共同形成受力复杂的空间结构体系，从而使纵向框支墙梁承担的荷载明显减少。在水平地震作用下，纵向框支墙梁承担的荷载较静载情况虽有明显增加，但其墙梁结构的受力机理没有发生改变。同时，通过空间有限元分析，给出了纵向托梁承担荷载的比例。
[关键词]  底层大开间  框支墙梁  组合墙  拟动力试验

Frame-wall beam is a critical member of composite masonry structure supported by frame shear wall with wide bay at bottom. The studies on the static and dynamic, behavior of frame-wall beam by pseudo-dynamic test show that all of the longitudinal and transverse walls have arc action. The load was transferred by space arc action, so the actual bearing load of wall beam supported by longitudinal beam decreased obviously in static load test. The bearing load increased in horizontal load test, but the action existed still obviously. Finally, the bearing load proportion of longitudinal beam was put forward by finite element analysis of building.
Keywords:  wide bay at bottom; composite masonry structure; frame-wall beam; pseudo-dynamic