Study On Aluminum Alloy Support And Hanger Skew Support And Earthquake Resistance

In recent years,China has paid more and more attention to seismic resistance of building electromechanical equipment,which has greatly promoted the development of seismic resistance of building electromechanical equipment in China.Aluminum alloy supports and hangers are a new type of supports and hangers,its connection form and seismic performance remain to be further studied.In this thesis,the failure modes and defects of traditional aseismic supports and hangers are summarized,and a new aseismic aluminum alloy connector is proposed.Through establishing the simplified mechanical model of single-side and double-side seismic supports and hangers and carrying out force analysis,the design of double-pipe and double-column aluminum alloy seismic supports and hangers is designed.The main design requirements refer to the current relevant codes,and the joint design meets the requirements of bearing capacity and stability.In order to study the seismic performance of aluminum alloy seismic supports and hangers,the low cyclic load is applied to the aluminum alloy seismic supports and hangers by using finite element software to simulate the horizontal seismic action.In order to verify the correctness and reliability of the finite element method,the existing test data and data are basically consistent with the finite element results in this paper to ensure the reliability of the analysis results.The aseismic analysis of aluminum alloy aseismic supports and hangers is carried out.The results show that there is a great difference between the positive and negative mechanical properties of the single-sided aseismic supports and hangers,and the aseismic slanting supports reach the critical bearing capacity in the first place while buckling around the weak axis.The positive and negative mechanical properties of the double lateral seismic supports and hangers are basically the same.The hysteretic curves are nonlinear,and the new seismic connectors are not damaged first,which meets the design requirements.Seismic supports and hangers can be selected according to the installation space,and the section of one side syncline support can be appropriately reduced according to the bearing capacity requirements to save costs.The finite element analysis shows that the two kinds of aluminum alloy seismic supports and hangers meet the design requirements,and the design method and formula in this thesis are safe.Based on the parametric analysis of the seismic performance of aluminum alloy supports and hangers,20 finite element models including gravity load,seismic Angle,seismic thickness and lug plate thickness are taken into account.The analysis results show that:（1）Within the design load range,aluminum alloy seismic support and hanger has a certain bearing capacity,the design should take full account of its bearing function,bearing and seismic overall design,not only can ensure the safety and reliability of mechanical and electrical system,but also can save cost.（2）The effect of aseismic diagonal support Angle on the single-sided aseismic support hanger is obvious,and its ultimate bearing capacity increases first and then decreases with the increase of the diagonal support Angle.Considering the actual aseismic effect,the installation space of the diagonal support and the economy,the installation Angle of the aseismic diagonal support is recommended to be 45°.（3）The aseismic support and hanger thickness has obvious influence on the aseismic support and hanger.Under the same condition,the aseismic support and hanger with smaller thickness will be the first to fail.Increasing the thickness of the aseismic support can effectively improve the ultimate bearing capacity,and the specification of the aseismic support can be determined according to the requirements in practical application.（4）Ear plate thickness of steam-water unilateral to seismic is relatively obvious,the influence of different steam-water ear plate thickness of the seismic performance of bearing force and failure mode are different,the ear plate thickness is small earthquake fitting prior to brace component damage,is not in conformity with the "strong node weak component" design principle,design should be according to actual condition and bearing capacity requirements determine the ear plate thickness.（5）The initial stiffness,yield load and peak load of the double lateral aseismic supports and hangers increase with the increase of the aseismic support Angle.If the installation space is allowed,the larger the aseismic support installation Angle is,the more conducive to aseismic support.