Concrete frame structure capable of intelligently sensing prefabricated assembly prestress

Abstract

The utility model relates to a concrete frame structure capable of intelligently sensing prefabricated assembly prestress. The concrete frame structure comprises a reinforced concrete column, beam column nodes, prefabricated prestressed beams, prestressed steel strands, optical fiber composite strands and sensors. At least one secondary tensioning optical fiber composite stranded wire is arranged in the plurality of prestressed steel stranded wires to replace the prestressed steel stranded wires, at least one bending anchoring optical fiber composite stranded wire is arranged to replace the prestressed steel stranded wires, and the optical fiber composite stranded wires comprise at least one optical fiber; the sensors are embedded in the center position of a beam-column joint, a beam-column interface, a beam inflection point position, a beam midspan position, a column inflection point position, a column foot position and a column top position. According to the utility model, full-life-cycle real-time monitoring can be carried out on various mechanical performance indexes such as stress and strain, the data can provide basis and early warning for overhaul, maintenance and possible damage of the structure, and the use safety and reliability of the structure are further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of prefabricated building and building intelligent monitoring technology, especially to a kind of intelligent perception prefabricated prestressed concrete frame structure. BACKGROUND

[0002] Building industrialization is the inevitable development trend of China's building industry today and in the future, and prefabricated building is an effective way to realize building industrialization.

[0003] And intelligent perception, intelligent monitoring, intelligent construction, intelligent operation and maintenance have gradually become the main trend of future urban building development.

[0004] However, at present, in the process of construction, service and operation of building, the stress of steel bars and prestressed reinforcement in key parts and control sections of each component, concrete strain, concrete crack width, component displacement and angle, etc. Variables, at present, mainly adopt artificial detection method, and this kind of detection means can only arrange personnel to measure after hidden trouble occurs due to technical characteristics, and cannot master the safety state of structure in real time. The main factor causing a series of safety accidents is often because of the subtle changes of building itself caused by years of accumulation, and this subtle change cannot be detected by artificial measurement, and it is difficult to achieve fine management by artificial inspection, and safety hidden danger is easy to occur.

[0005] In addition, in the construction process of traditional prefabricated prestressed assembly structure, after the completion of concrete pouring and tensioning of prefabricated prestressed beam, there will be loss of prestress in the process of stacking, transportation, hoisting, etc. And in the process of using the structure after assembly is completed, the prestress in the beam will continue to lose, and additional stress will be generated on the surrounding columns, walls and other components. However, the loss value of prestress and the real residual prestress in these processes cannot be measured, only based on various assumptions for speculation, or using the installed collection equipment after the completion of building construction for monitoring, but this method can only detect relative prestress value, and cannot read absolute prestress value. The results of these calculations or measurements often differ greatly from the actual value.

[0006] At present, in the whole life cycle of structure, the performance of structure cannot be evaluated in real time and effectively, and the future use performance of structure cannot be predicted. Overall, the intelligent level of building structure is still at a low level. Therefore, in order to further improve the use safety and reliability of prefabricated structure, it is necessary to further upgrade and optimize the monitoring method of structure. UTILITY MODEL CONTENT

[0007] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the prestress in prefabricated assembled structures cannot be accurately monitored in the prior art, and to provide a concrete frame structure that can intelligently sense the prestress of prefabricated assembled structures, which can monitor its various mechanical performance indicators such as stress and strain in real time throughout the entire life cycle. These data can provide a basis and early warning for the inspection, maintenance and possible damage of the structure, and further improve the safety and reliability of the structure.

[0008] To solve the above-mentioned technical problems, this utility model provides an intelligent sensing precast prestressed concrete frame structure, comprising:

[0009] reinforced concrete column;

[0010] The beam-column joint is located on the reinforced concrete column;

[0011] A precast prestressed beam is connected to the reinforced concrete column through the beam-column joint;

[0012] Prestressed steel strands, installed in the precast prestressed beam, include multiple secondary tensioning steel strands extending from both ends of the beam and multiple bent anchoring steel strands bent at the beam-column joint.

[0013] An optical fiber composite stranded wire is used to replace the prestressed steel strand. At least one secondary tensioned optical fiber composite stranded wire is provided in a plurality of secondary tensioned steel strands to replace the prestressed steel strand. At least one bent anchored optical fiber composite stranded wire is provided in a plurality of bent anchored steel strands to replace the prestressed steel strand. The optical fiber composite stranded wire includes at least one optical fiber.

[0014] The sensor, connected to the optical fiber, forms a sensor, which is embedded at the center of the beam-column node, the beam-column interface, the beam inflection point, the beam mid-span, the column inflection point, the column base, and the column top.

[0015] In one embodiment of this utility model, the optical fiber composite stranded cable includes:

[0016] A central wire, which is a carbon fiber rod, and the optical fiber is threaded through the carbon fiber rod;

[0017] Multiple edge wires are twisted around the central wire and wrapped around its outer periphery.

[0018] In one embodiment of this utility model, a plurality of gratings are etched on the optical fiber, and the gratings are distributed along the extension direction of the optical fiber.

[0019] In an embodiment of the utility model, the secondary tension fiber composite stranded wire includes a pre-tensioned section embedded in the prefabricated prestressed beam and a post-tensioned section extending from the prefabricated prestressed beam, and the fiber on the pre-tensioned section and the post-tensioned section is engraved with a grating.

[0020] In an embodiment of the utility model, the bent anchoring fiber composite stranded wire includes a pre-tensioned section, a horizontal section of a bending region at both ends, a bending part and a vertical section, and the pre-tensioned section, the horizontal section, the bending part and the vertical section are engraved with gratings.

[0021] In an embodiment of the utility model, the material of the side wire is the same as that of the prestressed steel strand.

[0022] In an embodiment of the utility model, the sensor includes:

[0023] The tendon stress meter is fixed on the stirrup, column bar and ordinary steel bar at the key position of the reinforced concrete column, the prefabricated prestressed beam and the beam-column joint;

[0024] The strain gauge is placed in the large deformation area of the reinforced concrete column, the prefabricated prestressed beam and the beam-column joint concrete;

[0025] The joint meter is placed at the joint of the prefabricated prestressed beam and the beam-column joint, the plastic hinge area of the prefabricated prestressed beam and the reinforced concrete column and the position where the diagonal crack may occur.

[0026] In an embodiment of the utility model, the sensor transmits signals to the sensor acquisition instrument through the signal line;

[0027] The fiber composite stranded wire transmits signals to the multi-channel optical fiber strain measurement instrument through the optical cable.

[0028] In an embodiment of the utility model, the multi-channel optical fiber strain measurement instrument and the sensor acquisition instrument transmit the collected data to the field monitoring room terminal in real time and save the data to the field database, and the data is transmitted to the cloud server in real time through the data wireless transmission device, and then transmitted to the remote monitoring room terminal and the remote database through the network and the switch.

[0029] In an embodiment of the utility model, the measured data can also be transmitted to the mobile terminal in real time through the operator base station.

[0030] The above technical scheme of the utility model has the following advantages compared with the prior art:

[0031] The intelligent sensing prefabricated prestressed concrete frame structure replaces part of the prestressed steel strands arranged in the prefabricated prestressed beam with optical fiber composite strands, cooperates with sensors to monitor the concrete frame structure, and embeds the sensors at the positions that need to be focused on stress and strain changes, such as the center position of the beam-column joint, the beam-column interface, the beam reverse bending point position, the beam midspan position, the column reverse bending point position, the column foot and the column top position, so that stress change data can be collected, and the traditional structure is upgraded to an intelligent structure, and the real stress of the reinforcement and the prestressed reinforcement, the concrete strain, the concrete crack width, the component displacement and the angle of the key parts and the control section of the maximum load bearing part and the like can be collected in real time from the structure level; from the component level, the mechanical performance indexes such as various stresses and strains can be monitored in real time throughout the life cycle. These data can provide basis and early warning for the maintenance and possible damage of the structure, and further improve the use safety and reliability of the structure.

[0032] The beam-column joint area of the prefabricated concrete frame structure is a weak part, and the connection of the beam-column joint directly affects the stability and seismic resistance of the overall structure, and the prestress value of the secondary tensioned part of the prestressed strand in the beam-column joint of the novel structure, the stress value of the bent and anchored strand and the pre-compression stress value of the node area concrete have important influence on the mechanical properties of the node area, and by arranging the secondary tensioned optical fiber composite strand and the bent and anchored optical fiber composite strand in the node area concrete and the sensor, the real stress state of the node area strand and the concrete can be monitored in real time more accurately, and early warning and basis are provided for the maintenance and reinforcement of the node area.

[0033] The beams, columns and the like are prefabricated, and various embedded sensors and optical fiber composite strands are built-in in the components during the manufacturing process of the beams, columns and the like, and the internal force and deformation and the like of the components can be monitored throughout the whole life cycle from production, storage, transportation, hoisting, service to demolition. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to make the content of the utility model more easily understood clearly, the utility model is further described in detail below according to the specific embodiment of the utility model and in combination with the drawings, wherein

[0035] Figure 1 It is a structural beam-column joint diagram of the utility model;

[0036] Figure 2 It is a node area sensor arrangement diagram of the utility model;

[0037] Figure 3 It is a node area column bar sensor arrangement diagram of the utility model;

[0038] Figure 4 Schematic diagram of beam end sensor arrangement of the utility model;

[0039] Figure 5 Schematic diagram of secondary tensioning steel strand partition of the utility model;

[0040] Figure 6 Schematic diagram of bending anchoring steel strand partition of the utility model;

[0041] Figure 7 Schematic diagram of optical fiber composite strand structure of the utility model;

[0042] Figure 8 Schematic diagram of optical fiber composite strand cross section of the utility model;

[0043] Figure 9 Schematic diagram of optical fiber composite strand center wire axial section of the utility model;

[0044] Figure 10 Schematic diagram of bending optical fiber composite strand grating distribution of the utility model;

[0045] Figure 11 Schematic diagram of post-tensioning optical fiber composite strand grating distribution of the utility model;

[0046] Figure 12 Schematic diagram of embedded intelligent reinforcement stress meter of the utility model;

[0047] Figure 13 Schematic diagram of embedded intelligent strain meter of the utility model;

[0048] Figure 14 Schematic diagram of embedded intelligent joint meter of the utility model;

[0049] Figure 15 Schematic diagram of signal transmission of the utility model.

[0050] Description of the drawings: 1, reinforced concrete column; 2, beam-column joint; 201, beam-column joint first pouring part; 202, beam-column joint post pouring part; 3, prefabricated prestressed beam; 4, column stirrup; 5, column bar; 6, composite layer reinforcement; 7, beam stirrup; 8, steel stress meter; 9, strain gauge; 10, joint meter; 11, secondary tension steel strand; 1101, secondary tension prestressed steel strand first tension section; 1102, secondary tension prestressed steel strand post tension section; 12, bent anchoring steel strand; 1201, bent anchoring steel strand first tension section; 1202, bent anchoring steel strand bending section; 13, anchor; 14, anchor pad; 1501, center wire; 1502, side wire; 1503, optical fiber; 1504, grating; 16, tension groove; 17, composite floor; 18, steel mesh; 19, secondary tension fiber composite strand; 20, bent anchoring fiber composite strand; 21, optical cable; 22, signal line; 23, multi-channel optical fiber strain measurement instrument; 24, on-site database; 25, on-site monitoring room terminal; 26, sensor acquisition instrument; 27, data wireless transmission equipment; 28, cloud server; 29, switch; 30, remote monitoring room terminal; 31, remote database; 32, operator base station; 33, mobile terminal. DETAILED DESCRIPTION

[0051] The utility model will be further explained in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the example does not limit the utility model.

[0052] Reference Figures 1-4 The utility model discloses a kind of intelligent perception prefabricated assembly prestressed concrete frame structure, comprising: reinforced concrete column 1, beam-column joint 2, prefabricated prestressed beam 3, prestressed steel strand, fiber composite strand and sensor, wherein: the reinforced concrete column 1, beam-column joint 2, prefabricated prestressed beam 3 constitute concrete frame structure, the prestressed steel strand is arranged in the prefabricated prestressed beam 3, the prestressed steel strand includes multiple secondary tension steel strand 11 protruding at beam body both ends and multiple bent anchoring steel strand 12 bending at beam-column joint position, the fiber composite strand is used to replace the prestressed steel strand, at least one secondary tension fiber composite strand 19 is arranged in multiple secondary tension steel strand 11 instead of the prestressed steel strand, at least one bent anchoring fiber composite strand 20 is arranged in multiple bent anchoring steel strand 12 instead of the prestressed steel strand, at least one optical fiber 1503 is included in the fiber composite strand, the sensor is buried at the position that stress change needs to be focused on in beam-column joint 2 center position, beam-column interface, beam reverse bending point position, beam midspan position, column reverse bending point position, column foot and column top position.

[0053] In the embodiment, the fiber composite strand can collect stress change data and bear tension as a force bearing bar, and the traditional structure is upgraded to an intelligent structure, so that the real stress of the steel bar and the prestressed bar, the concrete strain, the concrete crack width, the component displacement and the angle of the key parts and the control section of the joints of each component, the maximum load bearing part and the like can be collected in real time from the structure level; from the component level, the mechanical performance indexes such as various stresses and strains of the components can be monitored in real time throughout the life cycle, and these data can provide basis and early warning for the maintenance and possible damage of the structure, and further improve the use safety and reliability of the structure.

[0054] Specifically, the reinforced concrete column 1 can be prefabricated in a factory or cast in situ at a construction site; the column has column bars 5 and column hoops 4, and a beam-column joint 2 is arranged at the top of the column.

[0055] The beam-column joint 2 is poured in two times, the first time is to pour the beam-column joint first pouring part 201 together with the column at the lower part of the beam-column joint 2, and the second time is to pour the beam-column joint second pouring part 202 after the prefabricated prestressed beam 3 is hoisted to the designed position.

[0056] The beam-column joint 2 is cast in situ, and a tensioning groove 16 is reserved at the designed position during pouring; the tensioning groove 16 is located between the vertical intersection line of the beam and the column and the vertical edge line of the column.

[0057] The prefabricated prestressed beam 3 is a prefabricated prestressed composite beam, and the beam has a composite layer steel bar 6 and a beam hoop 7; the prefabricated prestressed beam 3 is prefabricated in a factory, and the composite floor slab 17 is cast in situ on the beam at the construction site after the beam is hoisted in place.

[0058] The beams, columns and the like components in the embodiment are prefabricated, and the sensors and the fiber composite strand are built in the components during the manufacturing process of the beams, columns and the like components, so that the internal force and deformation of the components can be monitored throughout the whole life cycle from production, storage, transportation, hoisting, service to demolition.

[0059] The beam-column joint 2 area of the fabricated concrete frame structure is a weak part, and the connection of the beam-column joint directly affects the stability and the seismic resistance of the whole structure, and the prestress value of the part of the prestressed strand that is secondarily tensioned, the stress value of the part of the strand that is bent and anchored and the pre-compression prestress value of the concrete in the joint area have important influences on the mechanical properties of the joint area in the new structure, and through the arrangement of the secondarily tensioned fiber composite strand 19 and the bent and anchored fiber composite strand 20 and the sensors in the concrete of the joint area, the real stress state of the strand and the concrete in the joint area can be monitored in real time more accurately, and early warning and basis can be provided for the maintenance and reinforcement of the joint area.

[0060] Specifically, the precast prestressed beam 3 has prestressed steel strands in the beam body, and the upper and lower parts of the beam body have prestressed steel strands, and the upper part of the beam body has secondary tension prestressed steel strands, and the lower part of the beam body includes secondary tension prestressed steel strands and bent anchoring steel strands 12.

[0061] Referring to Figure 5 As shown, the secondary tension prestressed steel strands are divided into three parts, the middle part is a secondary tension prestressed steel strand pre-tensioning section 1101, this part applies prestress to the beam body concrete by pre-tensioning method during the production of the precast prestressed beam 3 and is combined with the beam body by bonding; the other two parts are secondary tension prestressed steel strand post-tensioning sections 1102 extending out of both ends of the beam, which are post-tensioned after the node area concrete reaches the design strength, and are anchored by the anchor 13 and the anchor pad 14 after tensioning.

[0062] Referring to Figure 6 As shown, the bent anchoring steel strands 12 are also divided into three parts, the middle part is a bent anchoring steel strand pre-tensioning section 1201, this part applies prestress to the beam body concrete by pre-tensioning method during the production of the precast prestressed beam 3 and is combined with the beam body by bonding; the other two parts are 90° bent anchoring steel strand bending sections 1202 extending out of both ends of the beam, which are directly poured into concrete and do not apply prestress.

[0063] The upper secondary tension prestressed steel strand pre-tensioning section 1101 in the beam body is used to prevent the cracking of the upper concrete of the beam body caused by the arching of the beam after the tensioning of the prestressed steel strands at the bottom of the beam.

[0064] Referring to Figure 2 As shown, a certain number of steel mesh sheets 18 are arranged in the anchoring area concrete of the post-tensioning part of the precast prestressed beam 3 and the beam-column joint 2 to enhance the local splitting strength of the anchoring area concrete, and the specific number and diameter of the steel mesh sheets 18 are determined by calculation.

[0065] The secondary tension prestressed steel strand post-tensioning section 1102 of the lower part of the beam body can be coated with building grease on the surface, and then be sleeved with a corrugated pipe with an inner diameter slightly larger than the diameter of the steel strand, to realize the non-bonding connection mode with the node area concrete.

[0066] The secondary tension prestressed steel strand post-tensioning section 1102 of the lower part of the beam body can be coated with a slow-bonding material on the surface, and then be sleeved with a corrugated pipe with an inner diameter slightly larger than the diameter of the steel strand, to realize the bonding connection mode with the node area concrete.

[0067] Referring to Figures 7-9As shown, the optical fiber composite strand includes: a center wire 1501 and a plurality of edge wires 1502 twisted around the center wire 1501 and covered outside the periphery, the center wire 1501 is a carbon fiber rod, the optical fiber 1503 is provided in the carbon fiber rod, in this embodiment, the optical fiber composite strand is twisted by 6 surrounding edge wires 1502 around the middle 1 center wire 1501, the optical fiber 1503 is used as a detection unit in the sensor, and another change at any position on the entire optical fiber 1503 can be detected.

[0068] Specifically, in order to ensure the strength of the optical fiber composite strand, the material of the edge wire 1502 is the same as that of the prestressed steel strand, so that the optical fiber composite strand can bear tension as a stressed reinforcement.

[0069] Specifically, in order to further improve the accuracy of measurement, a plurality of gratings 1504 are engraved on the optical fiber 1503, the gratings 1504 are arranged along the extension direction of the optical fiber, and the gratings 1504 are arranged along the extension direction of the optical fiber. Figure 10 and Figure 11 As shown, the secondary tensioning optical fiber composite strand 19 includes a pre-tensioning section embedded in the prefabricated prestressed beam 3 and a post-tensioning section extending out of the prefabricated prestressed beam 3, the gratings 1504 (EX-1~EX-7) are engraved on the pre-tensioning section, and the gratings 1504 (EH-1~EH-10) are engraved on the optical fiber of the post-tensioning section; the bending anchoring optical fiber composite strand 20 includes a pre-tensioning section, a horizontal section of a bending region at both ends, a bending part and a vertical section, the gratings 1504 (WX-1~WX-7) are engraved on the pre-tensioning section, and the gratings 1504 (WW-1~WW-6) are engraved on the horizontal section, the bending part and the vertical section; the beam-column joint 2 area involved in the utility model is a cast-in-place concrete structure, after the joint area concrete reaches the design strength, the steel strand and the optical fiber composite strand at the beam end are subjected to secondary tensioning by the post-tensioning method, correspondingly, the gratings 1504 in the optical fiber composite strand are regionally and specifically arranged according to the pre-tensioning section, the secondary tensioning section and the bending section, which facilitates the phased and regional specific perception and feedback of the structure in each stage of construction and service, improves the monitoring efficiency and accuracy; and according to the recorded prestress value changes of the optical fiber composite strand in each stage and each region, the real prestress loss values of the prefabricated prestressed beam 3 in different stages and different regions under the conditions of production, maintenance, stacking, transportation, hoisting, service and various loads can be calculated, which provides a reference and basis for the subsequent optimization design of the type of component.

[0070] In other embodiments, one or more of the edge wires 1502 can be replaced by a carbon fiber wire of the same configuration, and a fiber with a grating 1504 is placed inside, and the stress values of the edge wire 1502 and the center wire 1501 are comprehensively considered, which can further improve the accuracy of the intelligent composite stranded wire in collecting stress values.

[0071] Referring to Figures 12-14 As shown in the figure, in order to meet different test requirements, the sensors include a tendon stress meter 8, a strain meter 9 and a joint meter 10, wherein: the tendon stress meter 8 is fixed on the stirrup, column bar and ordinary steel bars at key positions of the reinforced concrete column 1, the prefabricated prestressed beam 3 and the beam-column joint 2, such as the beam end, the column end, the plastic hinge area of the beam-column and the joint area, so as to monitor the stress state of these steels in real time; the strain meter 9 is placed in the areas with large deformation of the reinforced concrete column 1, the prefabricated prestressed beam 3 and the beam-column joint 2, such as the beam end, the column end, the plastic hinge area of the beam-column and the joint area, so as to monitor the concrete strain of these key positions in real time; the joint meter 10 is placed at the joint of the prefabricated prestressed beam 3 and the beam-column joint 2, the plastic hinge area of the prefabricated prestressed beam 3 and the reinforced concrete column 1 and the position where the diagonal cracks of the beam-column joint 2 may appear, so as to monitor the crack width of the concrete in real time.

[0072] Referring to Figure 15 As shown in the figure, the sensors transmit signals to the sensor acquisition instrument 26 through the signal line 22; the fiber composite stranded wire transmits signals to the multi-channel optical fiber strain measurement instrument 23 through the optical cable 21;

[0073] The multi-channel optical fiber strain measurement instrument 23 and the sensor acquisition instrument 26 transmit the collected data to the on-site monitoring room terminal 25 in real time and save them to the on-site database 24, and at the same time, the data is transmitted to the cloud server 28 in real time through the data wireless transmission 27 equipment, and then transmitted to the remote monitoring room terminal 30 and the remote database 31 through the network and the switch 29.

[0074] Specifically, the measured data can also be transmitted to the mobile terminal 33 in real time through the operator base station 32, providing multiple monitoring and management approaches for the operation and maintenance personnel, and through the combination of supporting transmission equipment, Internet of Things structural system, cloud computing, local area network or communication network seamless connection technology, massive node data parallel intelligent processing technology and the like, a complete structural safety real-time monitoring system is established.

[0075] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A smart sensing precast fabricated prestressed concrete frame structure, characterized in that, include: reinforced concrete column; The beam-column joint is located on the reinforced concrete column; A precast prestressed beam is connected to the reinforced concrete column through the beam-column joint; Prestressed steel strands, installed in the precast prestressed beam, include multiple secondary tensioning steel strands extending from both ends of the beam and multiple bent anchoring steel strands bent at the beam-column joint. An optical fiber composite stranded wire is used to replace the prestressed steel strand. At least one secondary tensioned optical fiber composite stranded wire is provided in a plurality of secondary tensioned steel strands to replace the prestressed steel strand. At least one bent anchored optical fiber composite stranded wire is provided in a plurality of bent anchored steel strands to replace the prestressed steel strand. The optical fiber composite stranded wire includes at least one optical fiber. The sensor is embedded at the center of the beam-column node, the beam-column interface, the beam inflection point, the beam mid-span, the column inflection point, the column base, and the column top.

2. The smart sensing precast fabricated prestressed concrete frame structure according to claim 1, wherein: The optical fiber composite stranded cable includes: A central wire, which is a carbon fiber rod, and the optical fiber is threaded through the carbon fiber rod; Multiple edge wires are twisted around the central wire and wrapped around its outer periphery.

3. The smart sensing precast fabricated prestressed concrete frame structure according to claim 2, wherein: The optical fiber is etched with multiple gratings, which are distributed along the extension direction of the optical fiber.

4. The smart sensing precast fabricated prestressed concrete frame structure according to claim 3, wherein: The secondary tensioned fiber composite stranded wire includes a pre-tensioned section embedded in the pre-stressed beam and a post-tensioned section extending out of the pre-stressed beam, with gratings engraved on the optical fibers of both the pre-tensioned and post-tensioned sections.

5. The smart sensing precast fabricated prestressed concrete frame structure according to claim 3, wherein: The bent and anchored fiber composite stranded cable includes a pre-tensioned section, a horizontal section with bending areas at both ends, a bending section, and a vertical section, and gratings are engraved on the pre-tensioned section, the horizontal section, the bending section, and the vertical section.

6. The smart sensing precast fabricated prestressed concrete frame structure according to claim 2, wherein: The material of the edge wire is the same as that of the prestressed steel strand.

7. The smart sensing precast fabricated prestressed concrete frame structure according to claim 1, wherein: The sensor includes: The reinforcement stress gauge is fixed on the stirrups, column bars, and ordinary steel bars at key locations of the reinforced concrete column, precast prestressed beam, and beam-column joint. Strain gauges are placed in areas of significant concrete deformation, such as reinforced concrete columns, precast prestressed beams, and beam-column joints. The crack gauge is placed at the junction of the precast prestressed beam and the beam-column joint, the plastic hinge zone between the precast prestressed beam and the reinforced concrete column, and at locations where diagonal cracks may appear at the beam-column joint.

8. The intelligent sensing prefabricated prestressed concrete frame structure according to claim 1, characterized in that: The sensor transmits signals to the sensor acquisition instrument via a signal line; The fiber optic composite twisted cable transmits the signal to the multi-channel fiber optic strain gauge via an optical cable. 9.The smart sensing precast fabricated prestressed concrete frame structure of claim 8, wherein: The multi-channel fiber optic strain gauge and sensor acquisition instrument transmit the acquired data to the on-site monitoring room terminal in real time and save it to the on-site database. At the same time, the data is transmitted to the cloud server in real time through the data wireless transmission equipment, and then transmitted to the remote monitoring room terminal and remote database through the network and switch. 10.The smart sensing precast assembly prestressed concrete frame structure according to claim 9, characterized in that: The measured data can also be transmitted to the mobile terminal in real time via the operator's base station.

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