1541 results about "Concrete composites" patented technology

The invention provides a concrete prefabricated energy storage cabin which comprises a cabin body and a cabin door which are made of a concrete composite material, so that the energy storage cabin has high compressive strength and high fire resistance rating, and a plurality of energy storage cabins can also be transversely arranged without spacing or stacked in the height direction, so that the occupied area is effectively reduced; an energy storage box provided with a basin-shaped box body and a cover plate is arranged in the cabin body, the cover plate covers the basin-shaped box body to form a closed energy storage cavity for accommodating a battery module, and the basin-shaped box body and the cover plate are also made of a concrete composite material, so that high temperature generated by thermal runaway of a battery in a single energy storage box can be effectively limited in the energy storage box; as the oxygen content in the energy storage box is relatively low, the flame can be automatically extinguished after the battery with relatively light thermal runaway degree is on fire; and for a battery fire with a heavy thermal runaway degree, a long time can be provided for fire fighting and extinguishment, and flames can be extinguished in time in the energy storage box.

The invention relates to the field of bridge monitoring, and particularly discloses a crack monitoring system for a fixed end of a steel-concrete composite beam. The method is used for solving the problems that multi-source information fusion, hot spot stress on-line accurate calibration, fatigue life real-time accurate evaluation, S-N curve dynamic correction and remote visual early warning are difficult to realize in crack monitoring of a fixed end of an existing steel-concrete composite beam under complex load and environmental interference. Comprising a multi-sensor data acquisition module, an edge preprocessing module, a data fusion and damage identification module, a hot spot stress calibration module, an early warning decision module, a visual remote communication module and a digital twinborn calibration module. According to the invention, through integration of multi-sensor synchronous acquisition, edge intelligent preprocessing, multi-source data fusion, online hot spot stress calibration and digital twinborn calibration, Monte life prediction and early warning and hybrid energy management, high sensitivity, low power consumption and accurate early warning of steel-concrete composite beam fixed end crack monitoring are realized.

The invention relates to the technical field of hogging moment region calculation, in particular to a hogging moment region long-term rigidity prediction method for a steel-concrete composite beam bridge. The invention discloses a long-term rigidity prediction method for a hogging moment area of a steel-concrete composite beam bridge. Comprising the steps that a welding stud connecting piece degradation time-varying model and a concrete bridge deck degradation full-time-domain model under the corrosion-fatigue coupling effect are constructed according to test data, and a steel-concrete composite beam bridge hogging moment area rigidity degradation model, steel-concrete composite beam bridge hogging moment area long-term rigidity prediction and the like are constructed. In the process of predicting the rigidity of the hogging moment area of the steel-concrete composite bridge, the deterioration mechanism of a welding stud connector under the corrosion-fatigue coupling effect is considered, the pitting corrosion condition under the environment influence and the welding stud crack condition under the vehicle load influence are considered, the influence of bridge deck slab cracks is considered in the pitting corrosion condition, and the rigidity of the hogging moment area of the steel-concrete composite bridge is predicted. In addition, the mutual relation among the welding stud pitting corrosion influence, the welding stud crack influence and the bridge deck crack influence is considered, and the rigidity of the hogging moment area of the steel-concrete combined bridge is accurately analyzed.

The invention relates to the technical field of ultra-high performance concrete, particularly discloses a fatigue performance evaluation method for a steel-UHPC combined bridge deck slab, and is used for solving the problem that the fatigue damage evolution process of the steel-UHPC combined bridge deck slab in the life cycle is difficult to accurately predict due to the fact that an existing evaluation method does not consider the influence of structural fatigue performance degradation. And the evaluation result is likely to be unsafe. According to structural parameters and material attributes of a reinforced UHPC layer, fatigue performance evaluation of a reinforced UHPC component under the action of an axial tension fatigue load is carried out, fatigue performance analysis of a stud connecting piece in ultra-thin UHPC under the action of a shear fatigue load is carried out, bending fatigue performance analysis of a steel-UHPC-pavement composition board is carried out based on a five-point bending test, and the bending fatigue performance of the steel-UHPC-pavement composition board is analyzed. And a time-varying fatigue analysis framework of the steel-concrete composite effect degraded steel-UHPC composite bridge deck is established, so that the evaluation result is more reliable, and the risk of unsafety is reduced.

A U-shaped recycled concrete composite beam, and a design and construction method therefor, the U-shaped recycled concrete composite beam comprising a prefabricated concrete casing (11) and cast-in-place compression-zone concrete (12), wherein the prefabricated concrete casing (11) is a recycled concrete casing, and has a U-shaped appearance; the cast-in-place compression-zone concrete (12) is high strength concrete, and the cast-in-place compression-zone concrete (12) is concrete with a strength grade of C50-C80; the thickness h1 of the bottom of the prefabricated concrete casing (11) is not less than 80 mm, and the widths b1 and b3 of lateral surfaces of the prefabricated concrete casing (11) are both not less than 45 mm; the width b2 of the cast-in-place compression-zone concrete (12) is not less than 100 mm; and a steel bar cage is provided in the U-shaped recycled concrete composite beam to serve as a framework. Compared with the prior art, the fire-resistant characteristic of recycled concrete and the excellent mechanical properties of high-strength concrete are fully exerted, the flexural bearing capacity and ductility of the recycled concrete beam can be effectively improved at room temperature, the bursting phenomenon of a fire-exposed surface is reduced at a high temperature, and the temperature field in the beam is significantly reduced.

The invention discloses a vibration noise analysis method for a combined box girder bridge with an axle coupling effect, and belongs to the technical field of bridge engineering. The method comprises the following steps: S1, establishing a train-track-bridge coupled vibration model of a high-speed railway steel-concrete combined box girder bridge, and compiling a train-track-bridge coupled vibration simulation analysis program based on a Matlab language and Ansys finite element software; s2, establishing a low-frequency noise prediction model in the steel-concrete combined box girder bridge of the high-speed railway, and obtaining a low-frequency noise radiation rule of a bridge structure; s3, establishing a medium-high noise prediction model of the steel-concrete combined box girder bridge of the high-speed railway, and performing numerical simulation on medium-high frequency radiation noise of a bridge structure; and S4, analyzing the influence parameters of the vibration noise of the steel-concrete combined box girder bridge of the high-speed railway in combination with the models established in the steps S1 to S3. The technical scheme is used for analyzing vibration and noise conditions of the steel-concrete composite beam applied to the field of railroad bridges.

The invention relates to an offshore floating type wind power steel shell concrete composite structure platform and a construction method, the platform comprises a steel shell, and the steel shell comprises an outer side steel shell and an inner side steel shell which are arranged at an interval; the inner concrete filling layer is filled between the outer side steel shell and the inner side steel shell; the connecting structure is arranged at the joint of the steel shell and the internal concrete filling layer and used for enhancing the connecting rigidity and stability of the steel shell and the concrete; the connecting structure comprises transverse reinforcing rib plates, longitudinal reinforcing rib plates, partition plates and anti-shear studs, the transverse reinforcing rib plates and the longitudinal reinforcing rib plates are arranged in a grid shape, the space between the outer side steel shell and the inner side steel shell is divided into a plurality of areas through the partition plates, and the anti-shear studs are used for enhancing the anti-shear capacity between the steel shells and concrete. Through innovative connection structure design, a steel structure is combined with concrete, efficient and intelligent hole design is combined with an advanced sensing technology, automatic control and intelligent monitoring, the construction quality of the structure is guaranteed, and an efficient and low-maintenance structural form is provided.

The invention discloses a concrete composite tackifier and a preparation method thereof, and relates to the technical field of concrete. When the concrete composite tackifier is prepared, firstly, polyacrylic resin obtained by polymerizing acrylic acid, methyl methacrylate, acrylamide and vinyl diphenylphosphine reacts with modified porphyrin, and then sulfonation is performed to obtain modified polyacrylic resin; the preparation method comprises the following steps: firstly, pre-treating silica fume with vinyltrimethoxysilane, then carrying out a reaction on the silica fume pre-treated with vinyltrimethoxysilane, tetravinyltetramethylcyclotetrasiloxane and vinylboronic acid pinacol ester to obtain modified silica fume, and finally, mixing polyacrylic resin and the modified silica fume to obtain the concrete composite tackifier. The concrete composite tackifier prepared by the invention has good working performance and antibacterial property.

The invention relates to the technical field of engineering design, in particular to a truss-web type steel-concrete composite beam deflection calculation method and system.The method comprises the steps that a mechanical simplified model of a truss-web type steel-concrete composite beam is built, calculation assumption is determined, and a calculation scheme is obtained; determining the acting mode of the external load on the composite beam; basic calculation parameters of the combined beam mechanical simplified model are determined; according to the action mode, calculating a rigidity reduction coefficient of the simply supported beam caused by shear deformation of a truss web member, a slippage effect of a steel-concrete connection interface and local deformation of a node under the action of different loads; calculating the equivalent flexural rigidity of the truss-web type composite beam; and calculating the deflection of the truss-web type steel-concrete composite beam under the action of different loads. By means of the method, the problem that an existing calculation method is poor in pertinence and applicability is effectively solved, so that the stress condition of the truss web type steel-concrete composite beam structure is correctly reflected; according to the method, multiple influences caused by discontinuity of the truss web members, including shear deformation of the truss web members, a slippage effect of a steel-concrete connection interface and additional deflection caused by local deformation of the nodes, are considered, and the midspan deflection of the truss-web type steel-concrete combined simply supported beam can be conveniently evaluated.

The invention relates to the technical field of parameter optimization, and discloses a steel-concrete composite beam bridge prefabricated segment prestress tension parameter optimization method and system, and the method comprises the steps: obtaining a design BIM model, classifying prefabricated segments, constructing an initial digital twinborn model, and obtaining monitoring data; processing the monitoring data to obtain corrected data; comparing the corrected data with a model simulation result, and calibrating the model to generate a precise digital twinborn model; evaluating a multi-dimensional robustness index to construct a feature vector; generating a self-adaptive tensioning strategy sequence through a graph neural network in combination with the feature vector and the precise model; according to the method, intelligent optimization of the tensioning parameters is achieved, and the construction precision and the structural safety of the steel-concrete composite beam bridge are remarkably improved.

The invention discloses a recycled concrete interlayer-corrugated steel plate composite shear wall with recoverable functions. The anti-seismic property of the steel plate-concrete composite shear wall can be improved, but the steel plate-concrete composite shear wall is prone to local buckling or large deformation under the action of large horizontal loads. Frame columns are vertically arranged on a foundation; shear walls are arranged between the frame columns; a self-resetting device and a friction energy consumption device are arranged between the bottom of the shear wall and the foundation; the self-resetting devices are arranged at the bottom of the shear wall and on the two sides of the friction energy dissipation device. The foundation and the frame columns are fixed through column foot connecting pieces, and a lower end plate is arranged in the center of the foundation. Energy is dissipated through deformation of the disc spring, self-resetting is achieved through the self-resetting device after an earthquake, and residual deformation after the earthquake can be reduced; the energy dissipation beam section generates shear deformation due to the displacement difference between the shear wall and the frame column, the beam section dissipates energy through friction and pulls the SMA stranded wires to deform, and structural deformation is restored through elastic restoring force of the SMA stranded wires after an earthquake.

The invention discloses concrete, a preparation method thereof and a bridge, and relates to the field of bridges. The material is applied to outer wrapping of the arch rib of the steel-concrete combined arch bridge and comprises the following raw materials: cement, fly ash, a nano admixture, a viscosity modified material, basalt fiber, an additive, fine aggregate, coarse aggregate and water. Wherein the nano admixture comprises nano silicon dioxide, nano calcium carbonate, nano titanium dioxide and dispersible rubber powder; the viscosity modified material comprises stone powder, mineral powder, cellulose ether and glass beads. The arch rib encased concrete for the steel-concrete combined arch bridge is successfully prepared by doping functional materials such as a nano admixture, a viscosity modified material and basalt fibers into the concrete, and the requirements of high strength, high binding power, high air tightness, high crack resistance, large flow regime and high quality of the encased concrete are met.

The invention relates to a stress analysis method and system based on a small and medium span bridge steel-concrete composite structure, and belongs to the technical field of stress analysis, and the method comprises the following steps: S1, building a finite element parameterized model of a steel-concrete composite bridge; s2, constructing a slippage effect model of a steel-concrete interface based on the constitutive relationship of the steel-concrete composite bridge; s3, applying a moving load working condition, and dividing a load position of the steel-concrete composite bridge through a dynamic grid; s4, solving and correcting the structural stress of the steel-concrete composite bridge; s5, key section stress distribution of the steel-concrete composite bridge is output so as to identify the maximum tension and compression stress area; the method has the beneficial effects that the dynamic change of the load action can be accurately reflected in the model so as to reflect the stress state of the bridge under the actual traffic load; and an accurate structural stress solution is gradually approximated, and a reliable stress analysis result is obtained by comprehensively considering material characteristics, structural geometrical shapes and load distribution factors.

The invention provides a cross section optimization method for a large-diameter offshore wind power hollow interlayer steel pipe concrete combined single pile foundation, which comprises the following steps of: digitally coding cross section parameters of the steel-concrete combined single pile foundation, setting an optimization target and a constraint condition, selecting a design variable range and generating an initial population; each individual represents a different section combination scheme; then, the fitness value of each section combination scheme of the steel-concrete combined single pile foundation is calculated, and multi-target Pareto layered screening is adopted for evaluation; finally, carrying out crossover operation on the selected steel-concrete combined single pile foundation section combination scheme to generate a new section combination scheme, and carrying out tiny random variation on section parameters of part of individuals through a set variation probability; and fitness evaluation, crossing and mutation operations are repeated, and through multi-generation evolution, a steel-concrete combined single-pile foundation section combination scheme conforming to the bending resistance and the total quality evaluation index of the inner and outer steel pipes is finally obtained.

The invention provides a concrete composite expanding agent and a preparation method thereof, and belongs to the field of concrete admixtures. The concrete composite expanding agent comprises modified phosphogypsum, fly ash, bauxite, a modified oxide and an auxiliary agent, and is obtained by uniformly mixing the modified phosphogypsum, the fly ash, the bauxite, the modified oxide and the auxiliary agent which have different specific surface areas. According to the composite expanding agent, the modified ardealite and the fly ash synergistically provide an early-stage expansion source, early-stage shrinkage of concrete is compensated through calcium sulphoaluminate hydration products, meanwhile, modified magnesium oxide serves as a later-stage expansion source, magnesium hydroxide is generated through slow hydration, and long-term expansion compensation is achieved; the device has the advantages of good strength, compensation capability and the like; a large amount of industrial waste residues such as ardealite and fly ash are utilized, high-added-value utilization of the industrial waste residues is achieved, and remarkable economic benefits are achieved.

The invention belongs to the technical field of concrete preparation, and particularly relates to a preparation method of a large-mixing-amount concrete composite admixture with solid waste residues as raw materials. The large-dosage concrete composite admixture provided by the invention comprises the following raw materials: phosphogypsum subjected to activation and modification treatment, lithium slag powder subjected to calcination and fine grinding treatment, silica fume, redispersible latex powder, quartz powder and sodium silicate, and the raw materials are added into concrete to serve as cement replacement components. And the compressive strength, static elastic modulus, impermeability, freezing resistance and other properties of the concrete are not influenced.

The invention discloses a method and system for analyzing the rolling resistance of a concrete-filled steel tube combined pier column, and the method comprises the steps: applying an axial compression load to the concrete-filled steel tube combined pier column, and dividing the cross section of the concrete-filled steel tube combined pier column into three layers of regions along a radial material change part; according to corresponding total cross-section average axial strain generated by the steel pipe concrete combined pier column when different axial compression loads are applied, equivalent stress corresponding to each layer of area is calculated, total axial force corresponding to each total cross-section average axial strain is calculated, and a total cross-section average axial strain-total axial force curve is formed; searching a first total cross-section average axial strain corresponding to the maximum value of the total axial force in the total cross-section average axial strain-total axial force curve and a second total cross-section average axial strain corresponding to a first obvious inflection point of the total cross-section average axial strain-total axial force curve, and calculating a ductility coefficient, and judging whether the concrete-filled steel tube composite pier column meets the ductility design requirement or not.

The invention relates to the technical field of steel-concrete composite beams, and discloses a steel-concrete composite beam bridge deck reinforcing device which comprises a sealing plate, a first hydraulic cylinder, a first supporting plate, a first polished shaft, a second supporting plate, a first support, a first rotating arm and a second hydraulic cylinder. In the using process, when one side of the top face of the web beam is subjected to overload pressure, the second supporting plate on the same side can be pressed downwards, then the first supporting plate on the same side is made to move downwards, and therefore the moving ends of the first hydraulic cylinders on the same side are made to return. And at the moment, hydraulic oil in the rodless cavities of the first hydraulic cylinders on the same side can enter the rodless cavities of the second hydraulic cylinders on the same side, and then the moving ends of the second hydraulic cylinders on the same side stretch out. And then, under the support of the first support on the same side, the first rotating arms on the same side can deflect towards the direction of the web beam. Due to the fact that hydraulic pressure is adopted as a power source, enough supporting force can be provided for the bottom face and the two side faces of the web beam, and then the anti-overturning performance is improved.

The utility model provides a fragmented steel-concrete composite structure transition section for a lattice type tower, which comprises two groups of fragmented structures which are oppositely arranged, two ends of the two groups of fragmented structures are connected through connecting components, each fragmented structure comprises a combined cavity, an outer steel shell, an inner steel shell cylinder, a top steel plate and a bottom steel plate, the inner steel shell barrel is arranged on the inner side of the outer steel shell, the top steel plate and the bottom steel plate are arranged on the tops and the bottoms of the inner steel shell barrel and the outer steel shell respectively and welded to the tops and the bottoms of the inner steel shell barrel and the outer steel shell to form a cavity, lattice type tower frame corner columns communicated with the combined cavity are arranged at the bottom of the combined cavity, and a concrete pouring body is arranged in the combined cavity. And the concrete pouring body is filled in an inner cavity of the lattice type tower corner post. The structure is simple in transmission and clear in stress, the compression resistance of the transition section can be remarkably improved, meanwhile, the risk of buckling of the combined cavity can be avoided, and the phenomenon that stress is concentrated when the stress of the upper steel tower is transmitted to the lower lattice section to be transmitted can be effectively avoided.

The invention discloses a UHPC-foam concrete composite material with a sandwich structure and a preparation method of the UHPC-foam concrete composite material. The composite material comprises two ultra-high performance concrete (UHPC) panel layers, a foam concrete sandwich layer of a negative Poisson's ratio three-dimensional framework prepared through a photocuring three-dimensional printing technology is arranged between the two ultra-high performance concrete (UHPC) panel layers, and the three-dimensional framework is of an inward-concave honeycomb topological structure and has the characteristic of transverse expansion after being pressed; impact stress can be effectively dispersed, and a dual energy dissipation path is formed through a synergistic effect with a porous energy absorption mechanism of the foam concrete. The panel layer and the sandwich layer are combined through a layered pouring process, and an interface is subjected to scabbling treatment so as to enhance the bonding strength. The composite material is superior to a traditional material in the aspects of compressive strength and energy absorption performance, is suitable for the fields of anti-explosion buildings, military protection engineering, frontier defense facilities and the like, and has a wide application prospect.

The invention discloses a steel pipe truss assembly type prestressed concrete laminated slab, and relates to the field of concrete laminated slabs. Comprising an internal PVC pipeline arranged in a concrete laminated slab, a PVC pipeline and a first internal steel pipe truss which are poured and fixed in the concrete laminated slab, and an external steel pipe truss which is connected to a second internal steel pipe truss in a threaded fit manner; when the grouting mechanism is connected to the end of the PVC pipeline, concrete sequentially passes through the PVC pipeline, the internal PVC pipeline, the first internal steel pipe truss, the second internal steel pipe truss, the external steel pipe truss and the grouting hole to be injected into the peripheral connecting position of the concrete laminated slab. The concrete laminated slab is provided with three modules, and the purposes that the connecting strength of the connecting positions of the concrete laminated slab is improved, concrete is convenient to pour and fix, and the position of the concrete laminated slab is convenient to adjust can be achieved.

The invention provides a concrete-concrete combined beam column plate joint and a construction method, and relates to the technical field of building constructions.The joint comprises a prefabricated column formwork, a prefabricated groove type beam and a slotting type prefabricated plate set, and the prefabricated groove type beam is erected on the side edge of the prefabricated column formwork; the plurality of slotted prefabricated slab groups are erected on the prefabricated channel beam at intervals in the length direction of the prefabricated channel beam; the slotted prefabricated slab group comprises two slotted prefabricated slabs connected to the two sides of the prefabricated channel beam in the length direction, and the notch additional steel bars are placed in slab edge notches of the two opposite slotted prefabricated slabs. A plurality of beam top additional reinforcements are arranged at intervals at the top of the prefabricated trough beam in the length direction; the prefabricated column formwork, the prefabricated groove type beam and the slotting type prefabricated plate set are connected to form a connection whole by pouring concrete; an additional steel bar set is arranged in the joint area and comprises joint stirrups, vertical lap joint steel bars and horizontal lap joint steel bars. The prefabricated part is of a non-rib-out structure, and the stacking and transporting efficiency is improved.

The invention belongs to the technical field of concrete prefabricated parts, and relates to an autoclaved aerated concrete composite thermal insulation wallboard and a manufacturing process thereof. The autoclaved aerated concrete composite thermal insulation wallboard is of a three-layer composite structure and comprises autoclaved aerated concrete layers on the two sides and a phenolic aldehyde board arranged between the autoclaved aerated concrete layers on the two sides. The manufacturing process comprises the following steps: carrying out high-temperature steam curing on the phenolic aldehyde plate in advance through a still kettle, then obliquely inserting and fixing the phenolic aldehyde plate by using a reinforcing mesh (the area of the reinforcing mesh is larger than that of the phenolic aldehyde plate), sinking into a mold filled with slurry for pre-curing, cutting after the composite thermal insulation wallboard is preliminarily formed, punching two sides of the wallboard, and then putting into the still kettle for autoclaved curing, thereby obtaining the composite thermal insulation wallboard. According to the manufacturing process, the phenolic aldehyde board is effectively prevented from being separated from the autoclaved aerated concrete layer, cracks are effectively prevented from occurring at the edge intersection position of the autoclaved aerated concrete and the phenolic aldehyde board, the percent of pass of the wallboard is increased, the service life of the wallboard is prolonged, and the autoclaved aerated concrete composite wallboard has wide market prospects.

The invention provides a counterweight difference adjustment method for hogging moment area jacking of a special-shaped multi-girder steel-concrete composite beam, which comprises the following steps of: establishing a finite element model of the special-shaped multi-girder steel-concrete composite beam, and arranging two ends and the middle part of the special-shaped multi-girder steel-concrete composite beam on a beam column; performing jacking height simulation of different numerical values on the special-shaped multi-girder steel-concrete composite beam at the middle supporting point for many times to obtain a first bridge deck stress result at the middle supporting point; carrying out balance weight difference adjustment finite element simulation on the basis of the first bridge deck stress result, and applying a balance weight along the line type of the main beam to adjust the pre-compressive stress of the bridge deck at the middle fulcrum of the main beam so as to achieve a design target; and the concrete bridge deck is constructed on the basis of counterweight data obtained through counterweight difference adjustment finite element simulation. By establishing a finite element model and carrying out multi-group jacking height simulation and subsequent counterweight difference adjustment simulation, the stress state of the bridge deck at the middle fulcrum of each main beam under different working conditions can be accurately determined. The counter weight is applied on the basis, so that the stress nonuniformity caused by a special-shaped structure and a multi-girder system can be effectively made up, the pre-compressive stress of the bridge deck at the middle supporting point of each girder is more uniform, and the design goal is accurately achieved.

The invention belongs to the technical field of bridge design, particularly relates to a plastic design theory-based steel-concrete composite beam flexural capacity optimization design calculation method, and aims to carry out section optimization analysis on a steel-concrete composite beam according to a principle that a bending moment design value of the steel-concrete composite beam is equal to plastic flexural capacity as optimal control, so as to obtain the optimal flexural capacity of the steel-concrete composite beam. And the optimal section size of the steel-concrete composite beam is obtained. The calculation method has the advantages that the standard is relatively unified, the potential of the material can be relatively well exerted, and the method is not too conservative.

The invention discloses an intelligent concrete composite material and a preparation method thereof. The material is formed by compounding a base material, a microencapsulated phase change material, a self-repairing agent and reinforced fibers. The microencapsulated phase-change material is of a core-shell structure, the core of the microencapsulated phase-change material is an organic phase-change substance, and the shell of the microencapsulated phase-change material is a polymer wall material; the self-repairing agent is a two-component microcapsule system containing a healing agent and a catalyst. When the building material is damaged by external force to generate microcracks, the stress at the tip of the cracks can enable the self-repairing microcapsules to be broken, the released healing agent is polymerized under the action of the catalyst, and self-repairing of the cracks is achieved. Meanwhile, the phase change material in the material can absorb or release a large amount of heat through phase transition, the internal temperature of a building is effectively adjusted, and energy consumption is reduced. The preparation process is simple, the cost is low, and the obtained material is excellent in comprehensive performance and has a wide application prospect.

The invention discloses a wind power generation tower drum steel-concrete composite structure design method based on genetic algorithm optimization. The method specifically comprises the steps that operation data and design parameters of different types of wind power generation tower drums under different working conditions are obtained to construct an original data set; secondly, determining a design target function and quantifying, and setting each target weight coefficient; a genetic algorithm population is initialized, and individuals are represented by design parameter codes; decoding individuals of the population to obtain an actual design scheme, performing structural mechanical analysis, and calculating mechanical property indexes; calculating an individual fitness value according to the target function and the weight coefficient; new individuals are generated through selection, crossover and mutation operation, whether termination conditions are met or not is judged, if yes, the design scheme corresponding to the individual with the highest fitness is output, and if not, iterative optimization continues. According to the method, the genetic algorithm is used for iterative optimization, the comprehensive performance of the design scheme of the steel-concrete composite structure of the wind power generation tower under multiple targets is effectively improved, and a better design result is obtained.

The invention relates to the technical field of concrete block cutting, in particular to a cutting device for concrete composite block production. Comprising a supporting frame, the supporting frame is in sliding connection with an outer frame, and the outer frame is in sliding connection with an inner frame; the multiple cutting assemblies are all arranged in the inner frame, each cutting assembly comprises two first U-shaped frames, the two first U-shaped frames are fixedly connected to the two sides of the inner frame correspondingly, and the first U-shaped frames are slidably connected with first mounting boxes; and the two guide wheels are rotationally connected to the adjacent first mounting boxes correspondingly, a cutting rope is fixedly connected between the two guide wheels, each guide wheel is provided with a first transition groove, and the first U-shaped frame is fixedly connected with a first convex column. The position of the guide wheel and the tensile force of the guide wheel on the cutting rope are adjusted according to the change of the resistance borne by the cutting rope, so that the stability of the cutting rope during cutting of each layer of the concrete composite building block is improved, and the cutting quality of the concrete building block is improved.

The invention relates to the technical field of concrete block production, and mainly provides a forming device for concrete composite block production. Comprising a frame body; the mounting shell is connected to the frame body in a sliding mode, and a building block mold is arranged below the mounting shell; and the multiple second electric push rods are installed in the installation shell, the telescopic ends of all the second electric push rods are jointly and fixedly connected with an installation frame, the installation frame is provided with an electric rotating rod, the electric rotating rod is in threaded connection with a connecting shell, the connecting shell is rotationally connected with a material guiding shell, and a connecting pipe is communicated between the connecting shell and the material guiding shell. When the building block mold is filled with building block raw materials, the material guide shell reciprocates, the inclination direction of the material guide shell is changed according to different moving directions, the building block raw materials entering the building block mold make contact with the corners of the building block mold firstly and then flow towards the middle, bubbles are prevented from being accumulated at the corners of the building block mold, and the building block mold is prevented from being broken down. And the integrity of the concrete block is reduced.

The invention relates to a straight web steel-concrete composite beam connecting structure and a construction method thereof, and belongs to the technical field of bridge engineering.The straight web steel-concrete composite beam connecting structure comprises a prefabricated bridge deck slab, a steel beam and a locking connecting assembly used for penetrating, locking and connecting the prefabricated bridge deck slab and the steel beam, and the locking connecting assembly comprises a connecting sleeve rod, a pressing rod, a pressing spring, a wedge-shaped block and a locking ball; a threaded hole for threaded connection of the connecting sleeve rod is formed in the steel beam, a connecting hole for insertion of the connecting sleeve rod is formed in the prefabricated bridge deck slab, the pressing rod is coaxially arranged in the connecting sleeve rod, the pressing spring is arranged on the pressing rod in a sleeving mode, and the wedge block is arranged at one end of the pressing rod. The locking ball is located between the pressing rod and the connecting sleeve rod and located between the pressing rod and the wedge-shaped block, the wedge-shaped block is provided with a wedge-shaped face, the wedge-shaped face abuts against the locking ball, and a locking hole for the locking ball to stretch out is formed in the connecting sleeve rod. The locking device has the advantages that locking connection operation is simple and convenient, the locking effect is good, the locking device is suitable for assembly construction, and meanwhile, disassembly and maintenance of the local prefabricated bridge deck slab are facilitated.