Study On Seismic Performance And Whole Life-cycle Design Method Of Special-shaped Column Multi-ribbed Composite Wall Structure

The multi-ribbed composite wall structure system is a new architectural structure system,which has the characters of energy dissipation, earthquake mitigation, energy-saving andenvironmental protection. Preferable phased objectives of theoretical study and engineeringapplication have been acquired through a decade of research and development. With theheight of urban residential architecture continues to increase, the rectangular cross-sectioncolumn of multi-ribbed composite wall structure is difficult to meet the needs of structuralstiffness and ductility, application is limitted in the high-rise buildings.Based on the research of special-shaped column structure and multi-ribbed compositewall structure, combined traditional multi-ribbed composite wall structure with special-shapedcolumn structure, special-shaped column multi-ribbed composite wall structure system isproposed. Through experimental research, theoretical analysis and numerical simulationmethods to study the seismic performance of the structure, whole life cycle optimizationmethod is proposed.1. By low cycle repeated horizontal and vertical load test of7multi-ribbed compositewall specimens, comparative analysis on bearing capacity, hysteretic characteristics andductility about seismic property of composite walls. Numerical simulation of mid-risemulti-ribbed composite walls based on ABAQUS software is established and comparisonbetween elastic-plastic analysis with experimental result is conducted. On this basis, by meansof static elastic-plastic analysis of special-shaped outer frame column multi-ribbed compositewall, influence rule on bearing capacity of walls, rigidity and displacement ductility inducedby special-shaped column shape, limb width/thickness ratio, reinforcement ratio andconcealed beam rigidity is acquired, which lays the foundation for anti-seismic propertyanalysis and design method research of special-shaped outer frame column multi-ribbed composite wall.2. On the basis of experimental research and numerical simulation of multi-ribbedcomposite wall, simplified tie-struts diagonal bracing rigid frame analysis method ofspecial-shaped outer frame column multi-ribbed composite wall hybrid structure is presented.The method consider multi-ribbed wall as tie-struts bracing obliquely arranged inspecial-shaped column frame. Diagonal bracing can bear tension considering reinforcementeffect in wallboard Ribbed lattice. Equivalent width calculation and plastic propertysimulation are discussed, and elastic-plastic analysis of multi-ribbed structure is made byusing simplified method. Comparing analysis result with experimental result, simplifiedmodel can preferably simulate dynamic property and deformation of multi-ribbed structure,and can available for elastic-plastic time-histories analysis of special-shaped columnmulti-ribbed composite wall hybrid structure.3. Principal theory of Incremental dynamic analysis （IDA） is stated. Selective methodof ground motion records is analyzed. Appropriate earthquake intensity and structuralperformance parameters are determined. Dynamic analysis model of special-shaped columnmulti-ribbed composite wall hybrid structure is established. Structural displacement limitingvalue aimed at different performance level ultimate state is gain through structural dynamicresponse analysis used IDA method. Structural seismic capacity curve and earthquakevulnerability curve are provided be means of structural seismic capacity analysis. Earthquakerisk evaluation and earthquake loss assessment basis of special-shaped column multi-ribbedcomposite wall hybrid structure is provided.4. Optimization problem of every stage during overall life-cycle is discussed. Life-cycleoptimized objective function in design stage is proposed. In contrast with optimizationvariables, such as reliability, anti-disaster fortification level and design strength, anti-disasterfortification level is selected as main optimization variables at last. And then designframework of two levels classified independent optimization is given. On this basis failuremode and failure criterion of architecture structure is discussed. In combined with multilevelfortification principle of seismic structure, classification failure criterion suited to singlefailure mode of life–cycle optimal design is proposed. According to classification failurecriterion simplified calculation method for structural failure probability is deduced. Thecalculation method is in line with existing anti-disaster design idea and considers randomness of structural property, which reasonably improves existing method. With optimal designstandard decision and minimum cost design at the core life-cycle two levels classifiedindependent optimization design procedure of architecture structure is given.5. Thermal performance of multi-ribbed composite wallboard using different padding isanalyzed. It is shown that thermal conductivity of padding has not notable influence onthermal conductance resistance of wallboard. Numerical simulation and contrastive analysisof full year energy consumption of six kinds of special-shaped column multi-ribbedcomposite wall are made by DeST-h software, providing basises for estimate on energyconsumption for the whole life cycle optimization design. Based on the overall life-cycleoptimal design method, specific issues are discussed on the life-cycle optimal design ofspecial-shaped column multi-ribbed structure. A multi-ribbed composite wall house weredesigned on whole life-cycle optimal design method.The main innovations of this paper are as follows：1. Special-shaped columns multi-ribbed composite wall structure is proposed shaped.Study on special-shaped column shape and other factors on the performance of the seismicperformance of composite wall, investigate the mechanical mechanism of stress and failuremodes of the wall.Based on the research of special-shaped column structure and multi-ribbed compositewall structure, combined traditional ribbed composite wall structure with special-shapedcolumn structure, special-shaped column multi-ribbed composite wall structure system isproposed. Through experiments and numerical analysis, investigate the mechanicalmechanism of stress and failure modes of the wall. Focus on the effects of special-shapedcolumn shape, limb width/thickness ratio, reinforcement ratio and concealed beam rigidity tothe wall stiffness, bearing capacity and displacement ductility, laying foundations forstructural analysis and design method for seismic performance.2. Simplified rigid frame-diagonal bracing analysis model of special-shaped columns-ribbed composite wall structure is proposed, seismic performance and vulnerability ofspecial-shaped column multi ribbed composite wall structure were analysised by IDA.The multi-ribbed composite wall panels can be equivalent to a two-way tension andcompression force diagonals, proposing rigid frame-diagonal bracing analysis modelfor special-shapedcolumns-ribbed composite wall structure. the method to determine diagonal geometric and mechanical parameters are given. The dynamic responseof structure were analyzed by IDA, displacement of the structure with different performancelevels under the state limits and seismic fragility curves were acquired.3. Design framework about full life-cycle of two levels classification optimization isproposed. The whole life cycle design method on special-shaped column multi-ribbedcomposite wall structure is given.Objective function with the peak ground acceleration and other design criteria asoptimization variables is established. For the first time, the thermal insulation performanceand the real-time dynamic energy of the multi ribbed composite wall is analyzed, methods forthe estimation of special-shaped column multi ribbed composite wall structure design andvarious expenses is discussed. Whole life-cycle optimization design of a multi-ribbedcomposite wall structure is conducted.