Papers by Author: Ai Hong Han

Abstract: Through the comparative analysis of theoretical and experiment results, this paper proved that the formulas for solving the strain of composite beams are correct, and the strain is consistent with the plane cross-section assumption. In order to reduce the influence of friction, resin membranes were placed in steel-steel composite beams and aluminum-steel composite beams. The strain measurements were performed on composite beams with and without adding resin, the influence of friction between the composite beams is analyzed by the comparison of strain data,.

Abstract: When the loading sustained by the foundation is large, employing piled raft foundation is one of the best solutions. In the elasto-plastic design of piled raft, piles could improve the differential settlement and reduce raft thickness. As the raft sustains high earth and water pressures, by reducing the span length of raft and excavation depth, one can get economic design. Using elasto-plastic property of the pile is a better method to avoid increasing the pile length and pile diameter and making full capacity of the piled raft foundation in design compared to normal piled raft. With adoption of few small diameter piles, the raft thickness could be reduced significantly. This makes it much better than raft foundation.

Abstract: The mechanical behavior research on double tower connected structure under earthquake action is more and more important gradually with wide application of high-rise building connected structures in the engineering field. Structure stress and deformation become extremely complicated due to connected structure, thereby the paper adopts two kinds of different analysis software for simulation of simplified model and system comparative analysis on a project example of one double tower connected structure, single tower separate calculation and double tower connected integral calculation are respectively conducted, structure dynamic features under the earthquake action is comparatively analyzed, the influence of connected structure on tower integral structure vibration mode, displacement and period is analyzed, thereby obtaining some conclusions beneficial for project design as references.

Abstract: In anti-seismic design of buried pipeline, selection of pipe-soil displacement transfer coefficient is the decisive factor for reasonable and stable analysis on seismic damage. This paper discusses calculation and selection of pipe-soil displacement transfer coefficient and related parameters, gives more definite, reasonable, simple, and reliable method of determination incorporating with existing achievements for analysis on seismic damage to buried pipelines. The results of analysis provide for anti-seismic design of buried pipelines with basis of reference.

Abstract: In this paper, seismic elastic and plastic responses of base-isolated structure are investigated, in which the bilinear restore-force model is employed for the isolation equipment. The mutual influences of both damping matrices and stiffness matrices are decoupled by using transition matrix. Based on the increment-dimensional precise integration method (PIM), the increment -dimensional blocks PIM is developed to separate structure characteristics and external forces, which can avoid the calculation of exponential matrices by PIM in each integration step. The results of numerical examples show that the efficiency of the new algorithm is very high in comparing with old method. The advantages of the new algorithm appear more obvious when the characteristics of large-scale structure have slightly changed, and only the external forces vary.