Abstract:
To study the influence of inclination on the seismic behavior of the Dou-Gong, carried out is the pseudo-static test on three full-scaled Dou-Gong bracket sets between columns with different inclinations along the width direction. Analyzed are the failure mode, hysteretic curve, skeleton curve, stiffness degradation, displacement ductility, and energy dissipation ability of Dou-Gong. The results show that when the inclined and non-inclined Dou-Gong are failed, the Zaixiao-Tenon is sheared, the Capblock and Flat-Beam slip relatively, and Dou-Gong rotates as a whole. The larger the inclination, the greater the slip of Capblock and Flat-Beam, while the smaller the rotational deformation of the Dou-Gong. The bearing capacity and lateral stiffness of Dou-Gong decrease with the increase of the Dou-Gong inclination when Dou-Gong is loaded along the inclined direction (positive direction), while the bearing capacity and lateral stiffness of Dou-Gong increase with the increase of the Dou-Gong inclination when Dou-Gong is loaded against the inclined direction (negative direction). As the inclination increases, the deformation ability of the Dou-Gong decreases, while the energy dissipation ability has no obvious relationship with the inclination. The numerical calculation models of Dou-Gong with different inclinations are established and the simulated value agrees well with the test value. Based on the validated model, further studied are the influences of vertical load, wood friction coefficient, elastic modulus, compressive strength and layer inclination of component on the seismic behavior of the inclined Dou-Gong. The results show that the bearing capacity and initial stiffness of the inclined Dou-Gong increase with the increase of the vertical load and wood friction coefficient, but are rarely affected by the wood elastic modulus and compressive strength along the radial direction. The bearing capacity and initial stiffness of the component layer inclined Dou-Gong are lower than those of the overall inclined Dou-Gong.