Based on the analysis of pendulum, the period formulas and dynamic model of asymmetric pendulum were explored, the effects of the release heights and the distances (the following known as nail distances) between two nails on the vertical on the period of asymmetric pendulum were analyzed and tested, we studied period differences on the condition that the asymmetric pendulum was released from different sides of the vertical. The test results indicate that the period of asymmetric pendulum decreases gradually with the increasing of nail distances under the same release heights condition and the asymmetric pendulum has the same period when the pendulum is released from different sides of the vertical under the condition of the same nail distances and the same release heights.

The results of theoretical research and earthquake damage investigation show that seismic response analysis of different plane structure in horizontal direction is different. Dynamic characteristics and seismic response analysis of four kinds of architectural models with different planes were analyzed by using the finite element analysis software. The inherent characteristics and earthquake time-history curves in different intensity level X, Y direction of displacement, velocity, acceleration and angle displace were studied. The results show that the seismic response of the four kinds of structures separates gradually, and the separation gap increases with increase of earthquake intensity. The building structure is safer in the long side direction than that in the short side in lateral earthquake response. The irregular structure can cause strong response in both horizontal in a single direction of earthquake effect. The second floor is a weak layer of the building structure which should be paid more attention to.