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This paper presents a study on the behavior of dual buildings in seismic areas. The structure analyzed here is composed of a masonry walls core surrounded by reinforced concrete frames. It will be built in Bucharest, Romania. Masonry can be used in seismic areas as infills for framed structures or as bearing walls. Buildings need the shape and rigidity distribution to minimize the effects of torsion...
Lifting mechanism is an important part of Dump Truck's refitting structure. It directly related to the use of performance and overall arrangement. It was main factor which decided to dump automobile refitting design criterion. 3201Z-type dump trucks is adapted from the EQ3208GJ type truck chassis whose technical performance parameters is known. By means of analyzing and comparing several schemes,...
Now the state norms of the bridge falsework have not yet been promulgated, and falsework design theory is seriously inadequate, which make it hard to guarantee the stability of bridge falsework and results in a series of bridge falsework collapse accidents in recent years. Based on the test of overall stability of the bridge falsework, AHP is used to give scoring weight to effect factors-the scoring...
The formulas of the displacement performances of single and double parallel four-bar flexure hinge mechanisms are theoretically given at first. Then, the output displacements and coupling errors of parallel four-bar flexure hinge mechanism are quantitatively analyzed by means of the finite element method (FEM). The analytical result demonstrates that for the same output displacement the coupling error...
The compliant double parallel four-bar mechanism is a classical parallel guiding mechanism. Two mathematic models of double parallel four-bar mechanism were built based on pseudo-rigid-body model and elastic beam theory. The elastic beam theory was used to analysis the effect of axial deformation on the displacement of moving plate at large displacement. Effect of compliant guiding beam geometric...
For boring of non-circular hole the key is to apply a force to a boring bar radically. A revolving magnetic actuation mechanism composed of a magnetic stator and a magnetic rotor has been designed, and a magnetic force between the stator and rotor can be controlled. The main component of the rotor is a flexure-hinged based elastic deformable unit. This unit connects a spindle at one hand and a boring...
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