低周反复荷载作用下钉节点性能试验研究

介绍了轻型木结构框架剪力墙结构中的面板与木框架钉节点在低周反复荷载作用下的试验研究;对采用不同OSB面板厚度、不同钉边距、顺纹或横纹受力的10组共100个钉节点试件的承载力、破坏模式、延性、刚度退化、强度退化和耗能性能作了比较分析。得到以下结论:钉边距影响钉节点的破坏模式;钉边距和面板厚度的增大有利于提高节点承载力、耗能和变形能力;板厚对顺纹受力试件承载力及横纹受力试件承载力相对关系影响较大,顺纹受力试件的延性与耗能能力相对横纹受力试件较差;钉边距增大使强度退化的速率逐渐降低;各因素对刚度退化的影响可忽略。

Test research on the behavior of nail joints under cyclic loading

Cyclic tests on nail joints between sheathing-and-frame in wood-frame construction are introduced. 10 types of nail joints made of different grain directions to load,different nail margins and different thickness of OSB panels are tested to investigate bearing capacity ,failure modes, joint ductility, stiffness deterioration, strength degradation, and energy dissipation capacity. Based on the test results, some conclusions are found：Different nail margins result in different failure mode;larger nail margins or thinker panels help to improve the bearing capacity, energy dissipation capacity and deformability of nail joints; The energy dissipation capacity and deformability of the connections is better when load directions are stud wood grain, but the relative of bearing capacity between joints with their grains perpendicular or parallel to the load is more or less subjected to OSB panels ; Nail joints using larger nail margins have lower speed of strength degradation; The factors discussed nearly have no impacts on the velocity of stiffness deterioration.