Seismic Strengthening Method for Wooden Houses by Connecting System Composed of Metal Connector and adhesive

通过水平加载试验，研究了不同连接体系对木屋抗震性能的影响。试验结果表明，由金属连接件和粘结剂组成的新型连接体系连接的木结构框架的极限强度、刚度和墙体强度系数等抗震性能优于传统的由Z-mark金属连接件组成的连接体系。采用这种新型连接体系，支撑可以承受较高的拉力。这种拉力能力大于采用新型连接系统的支撑的抗压能力。这意味着带支撑的木框架的墙体强度系数不能仅由支撑的截面尺寸来确定，在确定带支撑的木框架的墙体强度系数时应考虑连接体系的选择。新的连接体系对于既有木屋中的柱-梁或柱-梁连接是有效的，因为这种连接体系防止了柱在地震荷载作用下拔出梁或梁。从试验结果来看，两个单撑框架的强度之和不是双撑框架的强度之和。在本课题中，还对日本雪松板材Sugi板木框架的抗震性能进行了研究，试验参数为木质纤维方向、钉距和木架连接体系，试验结果表明，在柱-梁、柱-梁连接节点采用较好的连接体系，以及木板与框架连接时合理的钉距。

The horizontal loading tests were carried out to research the effect of the various kind of connecting systems on the structural behavior of wooden houses for earthquake.From test results, we reached the following conclusions.The seismic performance such as ultimate strength, rigidity and wall strength factor for wooden frames connected by the new type connecting system composed of metal connector and adhesive is better than that of the conventional connecting system composed of Z-mark metal connectors.The brace can carry high tension force using new connecting system mentioned above. This tension capacity is more than the compressive capacity of brace using new type connecting system. This means that wall strength factor for wooden frame with brace can not determined by only sectional dimension of brace.The kind of connecting system should be considered when the wall strength factor for wooden frame with brace are determined.The new connecting system is effective for the column-sill or column-beam connection in the existing wooden houses, because this connecting system prevents the column pulling out of beam or sill under earthquake loading.In this project, wooden frames with one brace and wooden frames with two braces ware tested. From this test result, the strength sum of two frames with one brace is not the strength of frame with two braces. This fact means that the arrangement method should be considered in determination process of wall strength factor of wooden frame with brace.In this project, the seismic performance of wooden frame with SUGI, which is Japanese cedar, panel is reseached too, In this case, test parameters are the wood fiber direction, nail distance and connecting system of wooden frame.The test results indicate the usage of preferable connecting system at column-sill and column-beam connections and the reasonable nail distance in attaching of wooden panel to frame.