Hangzhou Architectural Design and Research Institute Co.

Hangzhou, China

Hangzhou Architectural Design and Research Institute Co.

Hangzhou, China
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Xu M.,Nanjing Southeast University | Shi D.,Hangzhou Architectural Design and Research Institute Co. | Zhao N.,Nanjing Southeast University | Chen Z.,Nanjing Southeast University | Xiao N.,Hangzhou Architectural Design and Research Institute Co.
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2014

Horizontal cyclic loading tests were carried out on four full scale specimens to investigate the seismic behavior and shear capacity of smooth block stone masonry walls. The main parameters were mortar strength and construction measures. Based on the test results, failure mode, shear strength and seismic performance of stone walls were analyzed. It turns out that the failure mode of smooth block stone walls is the combination of bending failure and shear failure, in which shear deformation dominates. Along with the increase of the horizontal displacement, the shape of the hysteresis curve transforms from the thin spindle shape to the "S" shape, then to fat spindle shape, indicating that the ductility of smooth block stone walls is quite good, and the energy dissipation is also fine. Increasing mortar strength can improve shear capacity. Setting up structural column can improve the shear capacity and deformability both. The walls only with reinforced mortar layer would suffer quite sudden damage, which should be avoided in the design. Finally, theoretical calculation method and design calculation formula of shear capacity of smooth block stone masonry walls were proposed, which can meet requirements of test and engineering design respectively.


Xu M.,Nanjing Southeast University | Shi D.,Hangzhou Architectural Design and Research Institute Co. | Zhao N.,Nanjing Southeast University | Chen Z.,Nanjing Southeast University
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | Year: 2013

Horizontal cyclic loading tests were carried out on a full scale specimen and two reduced scale specimens to find out the appropriate reduced scale model of stone masonry walls. The failure mode, shear strength, horizontal displacement angle and seismic behavior were analyzed. The experimental results show that except for the hysteretic performance and energy dissipation capacity, the failure mode, shear strength, horizontal displacement angle and seismic behavior of the model with full scale block but reduced scale wall are close to those of the full scale model. This reduced scale model can basically represent the characteristics of the full scale mode. As for the reduced scale model strictly accordant with the theory of similarity, the failure mode and shear strength are close to those of the full scale model; however, because of the difference on surface roughness of block, the horizontal displacement and seismic behavior are totally different from those of the full scale model.


Chen Y.,Zhejiang University | Liu P.,Hangzhou Architectural Design and Research Institute Co.
Applied Mathematics and Information Sciences | Year: 2012

Exact analytical solution of free vibration for a linearly tapered beam with multiple arbitrarily placed rotational dampers is developed by taking advantage of the numerical assembly method (NAM) and Bessel functions. A characteristic equation for a tapered beam with any number of rotational dampers is therefore addressed in complex domain. Corresponding results for beams with different boundary conditions are also presented. The presence of the rotational dampers renders the solution of the characteristic equation complex valued. Therefore, a method is proposed to solve the equation in complex domain. To ensure the reliability of this method, the finite elements method (FEM) is used to verify the results achieved via the characteristic equation. Furthermore, with consideration of a single-rotational-damper case, the curves of the total maximum damping ratios and total optimal damping coefficients varying with taper ratios are also depicted for convenience of engineering application. © 2012 NSP Natural Sciences Publishing Cor.


Su L.,Zhejiang University | Suo J.,Zhejiang University | Suo J.,Hangzhou Architectural Design and Research Institute Co. | Song M.-L.,Zhejiang University
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | Year: 2014

Adopting the displacement-based probabilistic seismic vulnerability assessment methodology, the sensitivities of the parameters of the beam-sway RC frames are studied. These parameters include the peak ground acceleration, the structural beam geometric parameters and the material parameters. The analyses show that the vulnerability assessment results will change obviously when the mean values of peak ground acceleration, the beam geometric parameter and the limit state strain of reinforcement bar are changed. The coefficients of variability of the above parameters also affect the vulnerability assessment results while not so obvious compared with their mean values. The limit state strain value of concrete will affect little on the vulnerability assessment results.

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