WO2025007239A1 - 一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置 - Google Patents

一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置 Download PDF

Info

Publication number
WO2025007239A1
WO2025007239A1 PCT/CN2023/105505 CN2023105505W WO2025007239A1 WO 2025007239 A1 WO2025007239 A1 WO 2025007239A1 CN 2023105505 W CN2023105505 W CN 2023105505W WO 2025007239 A1 WO2025007239 A1 WO 2025007239A1
Authority
WO
WIPO (PCT)
Prior art keywords
steel tube
loading
concrete
spoke
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/105505
Other languages
English (en)
French (fr)
Inventor
安永辉
李松林
马丹阳
钟锦祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dalian University of Technology
Beihang University
Guangxi University
Original Assignee
Dalian University of Technology
Beihang University
Guangxi University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dalian University of Technology, Beihang University, Guangxi University filed Critical Dalian University of Technology
Priority to US18/280,090 priority Critical patent/US20250130148A1/en
Priority to PCT/CN2023/105505 priority patent/WO2025007239A1/zh
Publication of WO2025007239A1 publication Critical patent/WO2025007239A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/06—Special adaptations of indicating or recording means
    • G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means

Definitions

  • the invention belongs to the technical field of structural engineering, and in particular relates to a test device for synchronous long-term loading and measurement of a steel tube concrete reinforced hybrid structure.
  • steel tube concrete reinforced hybrid structure As a new type of engineering structure, steel tube concrete reinforced hybrid structure has many advantages such as high bearing capacity, good seismic performance, stable structure, good corrosion resistance, etc., and is widely used in bridge engineering construction.
  • concrete will have a significant creep effect due to its own material properties.
  • the creep of concrete will lead to the redistribution of internal forces in the structure, have a nonlinear effect on the stress of the structure, and seriously affect the stress and deformation of the structure, which will bring safety hazards to the project.
  • the commonly used loading and measuring devices such as the loading device described by Wang Qingli et al. in "Device and method for studying the performance of steel tube concrete axial compression members under load and corrosion"
  • the loading device described by Wang Qingli et al. in “Device and method for studying the performance of steel tube concrete axial compression members under load and corrosion” can often only load the entire cross-section of the steel tube concrete reinforced hybrid structure at one time, and cannot load the core steel tube concrete part and the peripheral reinforced concrete part of the steel tube concrete reinforced hybrid structure in stages, which limits the research on the mechanical properties of the structure under staged construction conditions.
  • the present invention provides a test device for long-term loading and measurement synchronization of a steel tube concrete reinforced hybrid structure.
  • staged loading of an inner steel tube concrete part and an outer reinforced concrete part can be realized, and long-term synchronous measurement of the internal force and deformation of each structure can be performed, which solves the problem that the existing loading device cannot accurately distinguish the internal force and deformation of the inner steel tube concrete and the outer reinforced concrete under staged construction, and can provide technical support for further studying the internal force redistribution law and deformation development law of this type of structure under long-term load.
  • the present invention proposes a test device for long-term simultaneous loading and measurement of a steel tube concrete reinforced hybrid structure.
  • Previous loading devices often load the steel tube concrete reinforced hybrid structure as a whole, rarely considering the staged construction and load-bearing characteristics of such structures, and loading and measuring the built-in steel tube concrete part and the entire structure in stages.
  • the present invention intends to solve the problems in the existing steel tube concrete reinforced hybrid structure loading and measurement technology, load the built-in steel tube concrete part and the entire structure in two stages, and measure the stress conditions of the built-in steel tube concrete part and the peripheral reinforced concrete part respectively, perform independent stress analysis on them, and obtain the creep conditions of the concrete in each part respectively, providing a basis for scientific calculation and analysis of actual engineering.
  • a test device for long-term loading and measurement synchronization of a steel tube concrete reinforced hybrid structure comprising a loading component 10, a load measurement component 20, a deformation measurement component 30 and a steel tube concrete reinforced hybrid structure 40;
  • the loading assembly 10 includes an upper loading plate 101, a lower loading plate 102, a spoke sensor pad 103, a spoke sensor nesting plate 104, a lower loading rod 105, an upper loading rod 106, a lower nut 107, a middle nut 108, an upper nut 109, a lower disc spring 110, a middle disc spring 111 and an upper disc spring 112;
  • the upper loading rod 106 passes through the upper loading plate 101, and its end is fixed to the upper loading plate 101 through the upper nut 109 and the upper disc spring 112;
  • the lower loading rod 105 passes through the spoke sensor nesting plate 104 and the lower loading plate 102 in sequence, and its end is fixed to the upper loading plate 101 through the lower nut 107 and
  • the lower disc spring 110 is fixed on the lower loading plate 102, wherein the lower part is fixed on the spoke sensor nesting plate 104 through the middle nut 108 and the middle disc spring 111;
  • the spoke sensor nesting plate 104 has a central hole, one end of the
  • the load measuring assembly 20 includes a tension sensor 21 and a spoke pressure sensor 22.
  • the tension sensor 21 is connected to the lower loading rod 105 and the upper loading rod 106 at both ends, respectively, and is used to measure the load of the steel tube concrete reinforced hybrid structure 40.
  • the spoke pressure sensor 22 is installed on the spoke sensor pad 103, and is used to measure the load of the steel tube concrete.
  • the deformation measurement assembly 30 includes a displacement meter 31, a displacement meter lower support 32, a displacement meter upper support 33, a wire drawing 34 and a plurality of strain gauges; at least two displacement meters 31 and five strain gauges together constitute a deformation measurement system of the steel tube concrete reinforced hybrid structure 40; the displacement meter 31 is connected between the upper loading plate 101 and the lower loading plate 104 through the displacement meter upper support 33 and the displacement meter lower support 32, and the strain gauge is bonded to the inside and surface of the steel tube concrete reinforced hybrid structure 40;
  • the steel tube concrete reinforced hybrid structure 40 includes a steel tube 41, concrete inside the steel tube 42, concrete outside the steel tube 43, longitudinal bars 44 and stirrups 45. It is the loading and measurement object of the test device and is geometrically installed in the structural frame of the loading component 10; the steel tube 41 and the concrete inside the steel tube 42 constitute the steel tube concrete, and the concrete outside the steel tube 43, longitudinal bars 44 and stirrups 45 constitute the outer reinforced concrete.
  • the cross section of the spoke sensor pad 103 is the same in shape and area as the cross section of the steel tube concrete.
  • the spoke sensor pad 103 is provided with a threaded column and connected to the threaded hole of the spoke pressure sensor 22 in the load measurement assembly 20 .
  • the height of the spoke sensor pad 103 is adjusted by the lower nut 107 and the lower loading plate 102, so that the spoke sensor nesting plate 104 and the spoke sensor pad 103 are kept on the same plane during the whole loading process.
  • the cross section of the steel tube 41 and the shape of the concrete 43 outside the steel tube are not limited.
  • strain gauges include a concrete strain gauge 35 , a steel pipe transverse strain gauge 36 , a steel pipe longitudinal strain gauge 37 , a longitudinal reinforcement strain gauge 38 and a stirrup reinforcement strain gauge 39 .
  • a method for installing a test device for long-term loading and measurement synchronization of a steel tube concrete reinforced hybrid structure the specific steps are as follows:
  • Step 1 As shown in FIG5-1, weld the steel pipe 41 at the geometric center of the upper loading plate 101;
  • Step 2 As shown in FIG5-2, after welding, pour concrete 42 inside the steel pipe from the other end of the steel pipe 41;
  • Step 3 As shown in FIG5-3, four sets of upper disc springs 112, upper nuts 109, and upper loading rods 106 are sequentially installed to the openings corresponding to the four corners of the upper loading plate 101;
  • Step 4 As shown in FIG5-4, one end of the tension sensor 21 is connected to the other end of the upper loading rod 106, and the other end of the tension sensor 21 is connected to the lower loading rod 105;
  • Step 5 As shown in FIG. 5-5, the spoke sensor pad 103 is bonded to the other end of the steel pipe 41 and the concrete 42 in the steel pipe, and the spoke sensor nesting plate 104 is inserted into the lower loading rod 105;
  • Step 6 As shown in FIG. 5-6, the middle disc spring 111 and the middle nut 108 are sequentially installed on the lower loading rod 105 outside the spoke sensor nesting plate 104, and the spoke pressure sensor 22 is firmly connected to the spoke sensor pad 103;
  • Step 7 As shown in FIG5-7, install the lower loading plate 102 to the end of the lower loading rod 105, and install the lower disc spring 110 and the lower nut 107 on the outside of the lower loading plate 102 in sequence; turn the entire device over so that the lower loading plate 102 is at the bottom and the upper loading plate 101 is at the top; paste the upper steel tube transverse strain gauge 36 and the steel tube longitudinal strain gauge 37 on the middle of the steel tube 41, and fill the gap between the spoke sensor pad 103 and the spoke sensor nesting plate 104 with foam glue 50;
  • Step 8 As shown in Figure 5-7, by adjusting the four middle nuts 108 and the lower nuts 107, ensure that the spoke sensor nesting plate 104 and the lower loading plate 102 are level, thereby ensuring that the bottom surface of the spoke pressure sensor 22 and the spoke sensor pad 103 are level, so that the steel tube concrete and the outer reinforced concrete are in the same plane; the axial load is constant by tightening the four upper nuts 109 diagonally in turn to load, ensuring that the loads of the four tension sensors 21 are the same, and the loading is stopped when the load value loaded to the spoke pressure sensor 22 reaches the design load; during the long-term load holding process, the internal force of the steel tube concrete is continuously measured by the spoke pressure sensor 22. When the internal force is reduced due to concrete creep, the four upper nuts 109 are tightened in time to supplement the load;
  • Step 9 As shown in FIG. 5-8, fix the two ends of the longitudinal reinforcement 44 to the upper loading plate 101 and the spoke sensor nesting plate 104 along the direction of the steel pipe 41, and tie the stirrups 45 around the longitudinal reinforcement 44;
  • Step 10 As shown in FIG. 5-9, longitudinal reinforcement strain gauges 38 and stirrup reinforcement strain gauges 39 are pasted at corresponding positions of longitudinal reinforcement 44 and stirrup reinforcement 45 to measure the strain of the reinforcement; then, the outer concrete 43 of the steel tube is poured on the periphery to form a steel tube concrete reinforced hybrid structure 40, and the displacement meter 31 is installed between the upper loading plate 101 and the spoke sensor nesting plate 104 through the displacement meter lower support 32, the displacement meter upper support 33, and the wire drawing 34 to measure the axial compression deformation of the steel tube concrete reinforced hybrid structure 40; thus, a test device for long-term loading and measurement synchronization of the steel tube concrete reinforced hybrid structure is formed;
  • Step 11 As shown in Figure 5-9, by adjusting the four middle nuts 108, the upper surface of the spoke sensor nesting plate 104 is made flush with the lower end surface of the concrete 42 in the steel pipe, and loading is performed by tightening the four upper nuts 109 diagonally in sequence to ensure that the four tension sensors 21 are subjected to the same load. The loading is stopped when the sum of the load values of the four tension sensors 21 reaches the design load. When the internal force is reduced due to the creep of concrete during long-term loading, the four upper nuts 109 are tightened in time to supplement the load.
  • the beneficial effects of the present invention are as follows: a method for manufacturing and installing a test device for long-term loading and measurement of a steel tube concrete stiffened hybrid structure is provided. By reasonably arranging the loading components and the measuring components, loads can be applied to the steel tube concrete part and the entire steel tube concrete stiffened hybrid structure part separately, and the load and deformation of the steel tube concrete and the entire steel tube concrete stiffened hybrid structure can be independently measured, so that the load and deformation of the steel tube concrete stiffened hybrid structure 40 can be effectively analyzed.
  • FIG1 is a schematic diagram of assembling a loading assembly of a steel tube concrete reinforced hybrid structural member provided by the present invention
  • FIG2 is a schematic diagram of the assembly of a load measurement assembly of a steel tube concrete reinforced hybrid structural member provided by the present invention
  • FIG3-(a) is a schematic diagram of the assembly of a deformation measurement assembly of a steel tube concrete reinforced hybrid structural member provided by the present invention
  • FIG3-(b) is a schematic diagram of the deformation measurement component of the steel tube concrete reinforced hybrid structural member provided by the present invention being located inside the concrete outside the steel tube;
  • FIG4 is a schematic diagram of a steel tube concrete reinforced hybrid structural member provided by the present invention.
  • FIG5-1 is a schematic diagram of welding steel pipes in the installation process of the test device provided by the present invention in an embodiment
  • FIG5-2 is a schematic diagram of pouring concrete in a steel pipe during the installation process of the test device provided by the present invention in an embodiment
  • FIG5-3 is a schematic diagram of installing a loading plate in the installation process of the test device provided by the present invention in an embodiment
  • 5-4 is a schematic diagram of installing a tension sensor in the installation process of the test device provided by the present invention in an embodiment
  • 5-5 is a schematic diagram of installing a spoke sensor pad and a spoke sensor nesting plate in the installation process of the test device provided by the present invention in an embodiment
  • 5-6 is a schematic diagram of installing a spoke-type pressure sensor in the installation process of the test device provided by the present invention in an embodiment
  • 5-7 is a schematic diagram of installing the lower loading plate and partially loading the concrete-filled steel tube in the installation process of the test device provided by the present invention in an embodiment
  • FIG. 5-8 is a schematic diagram of installing a steel bar skeleton in the installation process of the test device provided by the present invention in an embodiment
  • 5-9 is a schematic diagram of pouring concrete outside the steel tube and loading the steel tube concrete reinforced mixed structure as a whole in the installation process of the test device provided by the present invention in an embodiment
  • FIG. 6-(a) is a graph showing strain development data obtained by the test device provided by the present invention in an embodiment.
  • FIG. 6-(b) is a diagram showing the development data of the structural internal force obtained by the test device provided by the present invention in the embodiment.
  • 10 loading assembly 101 upper loading plate; 102 lower loading plate; 103 spoke sensor pad; 104 spoke sensor nesting plate; 105 lower loading rod; 106 upper loading rod; 107 lower nut; 108 middle nut; 109 upper nut; 110 lower disc spring; 111 middle disc spring; 112 upper disc spring; 20 load measurement assembly; 21 tension sensor; 22 spoke pressure sensor; 30 deformation measurement assembly; 31 displacement meter; 32 displacement meter lower support; 33 displacement meter upper support; 34 wire drawing; 35 concrete longitudinal strain gauge; 36 steel pipe transverse strain gauge; 37 steel pipe longitudinal strain gauge; 38 longitudinal reinforcement strain gauge; 39 stirrup reinforcement strain gauge; 40 steel tube concrete reinforced hybrid structure; 41 steel pipe; 42 concrete inside steel pipe; 43 concrete outside steel pipe; 44 longitudinal reinforcement; 45 stirrup reinforcement; 50 foam glue.
  • the loading assembly 10 is disassembled into several sub-loading plates, sub-loading rods, sub-loading nuts, and sub-preloaded disc springs, which can be processed and transported separately, thereby improving work efficiency.
  • the loading assembly 10 is designed and spliced according to the geometry and load-bearing size of the steel tube concrete reinforced hybrid structure 40.
  • the steel tube of the steel tube concrete reinforced hybrid structure 40 is a round steel tube with a diameter D of 89 mm and a thickness t of 4.5 mm.
  • the outer concrete is a square with a side length B of 222 mm.
  • the length direction of the component is a uniform cross-section with a length L of 666 mm.
  • the component is equipped with 12 longitudinal bars 44 with a diameter of 8 mm, and 14 stirrups 45 with a diameter of 6 mm are evenly arranged along the longitudinal bars 44.
  • the thickness of the concrete protective layer of the component is 10 mm.
  • the bearing capacity Nu of the component is calculated to be 2241 kN.
  • a test device for long-term loading and measurement synchronization of steel tube concrete reinforced hybrid structure is designed: as shown in Figure 1, the upper loading plate 101, the lower loading plate 102, and the spoke sensor nesting plate 104 are all squares with a side length of 465mm, and a circular hole with a diameter of 38mm is opened at each of the four corners of the square at a position 60mm close to the edge; the spoke sensor pad 103 corresponds to the steel tube concrete part and has a diameter of 89mm.
  • the diameter of the geometric center opening of the spoke sensor nesting plate 104 is 91mm, and the distance between the inner wall of the center hole of the spoke sensor nesting plate 104 and the outer wall of the spoke sensor pad 103 is 0 ⁇ 2mm; the lower loading rod 105 and the upper loading rod 106 are of diameter The distance between the inner edge of the four corner openings of the loading rod and the loading plate is 0 ⁇ 2mm, and nuts and disc springs matching the loading screw are used; the thickness of the upper loading plate 101, the lower loading plate 102, the spoke sensor pad 103, and the spoke sensor nesting plate 104 are all 30mm; the gap between the spoke sensor nesting plate 104 and the spoke sensor pad 103 is filled with foam 50 before pouring the steel tube outer concrete 43; as shown in Figure 3, the steel skeleton of the steel tube outer concrete 43 is composed of 12 longitudinal bars 44 with a diameter of 8mm and 14 stirrups 45 with a diameter of 6mm.
  • the longitudinal bars 44 are connected to the loading plate by welding, and the stirrups 45 are tied to the periphery of the longitudinal bars 44 by wire tying. According to the test device manufacturing steps for long-term loading and measurement synchronization of steel tube concrete reinforced hybrid structure proposed in this patent, a test device is manufactured.
  • the steel tube 41 is welded to the upper loading plate 101, and the other end of the steel tube 41 is opened upward to cast the steel tube inner concrete 42 to form a steel tube concrete module; after the curing is completed, the steel tube concrete part of the specimen is loaded by the loading assembly 10, and after a period of time, the lower loading plate 102, the spoke sensor pad 103, and the spoke sensor nesting plate 104 are installed to the corresponding positions by nuts and screws, and the foam glue 50 is filled between the spoke sensor pad 103 and the spoke sensor nesting plate 104 to form the steel tube outer concrete 43
  • the upper and lower formwork modules are connected; the longitudinal reinforcement 44 is connected between the upper loading plate 101 and the spoke sensor nesting plate 104, and the stirrups 45 are tied around the longitudinal reinforcement 44 to form a steel skeleton of the steel tube outer concrete 43; the side formwork of the customized steel tube outer concrete 43 is welded between the upper loading plate 101 and the spoke sensor nesting plate 104 to form a formwork of the steel tube outer concrete; the entire loading device
  • the method of making a steel tube concrete reinforced hybrid structure 40 in the device of the present invention introduced above is used to solve the problem of on-site cast steel tube concrete reinforced hybrid structure 40 that cannot be realized in scientific research.
  • the long-term casting process of first casting the concrete 42 inside the steel tube and then casting the concrete 43 outside the steel tube under the condition that the concrete 42 inside the steel tube is under load makes the scientific research more in line with actual engineering and makes the scientific research results more authentic and accurate.
  • the steel tube concrete reinforced hybrid structure 40 is loaded in stages: the steel tube concrete structure with the concrete 42 poured inside the steel tube is installed into the test device for long-term loading and measurement of the steel tube concrete reinforced hybrid structure provided by the present invention; the steel tube transverse strain gauge 36 and the steel tube longitudinal strain gauge 37 are pasted to the surface of the middle position of the steel tube 41; the four middle nuts 108 are adjusted to the same horizontal plane to ensure that the spoke sensor nesting plate 104 is level; the displacement meter 31 is installed between the upper loading plate 101 and the spoke sensor nesting plate 104 through the displacement meter lower support 32, the displacement meter upper support 33, and the wire drawing 34; the four lower nuts 108 are adjusted to the same horizontal plane to ensure that the spoke sensor nesting plate 104 is level; the displacement meter 31 is installed between the upper loading plate 101 and the spoke sensor nesting plate 104 through the displacement meter lower support 32, the displacement meter upper support 33, and the wire drawing 34; the four lower nuts 10 7 are adjusted to the same horizontal plane to ensure that the lower loading plate 102 is
  • the actual measured results of creep and load of the component by the test device in this example are shown in the figure below, where t1 represents the first stage of applying long-term load to the steel tube concrete part alone, and t2 represents the second stage of applying long-term load to the entire steel tube concrete reinforced hybrid structure 40 after pouring the concrete outside the steel tube.
  • the test results show that the device of the present invention can collect the creep deformation of the structure during the entire stress process, and can synchronously and independently collect the internal forces of the steel tube concrete part and the peripheral reinforced concrete part.
  • the staged loading method for the steel tube concrete reinforced hybrid structure 40 introduced above is used to solve the scientific problem that the internal forces of the built-in steel tube concrete part and the external reinforced concrete part cannot be accurately distinguished, and provides reliable experimental results for further studying the internal force redistribution law and deformation development law of this type of structure under long-term load.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

本发明提供一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置，包括加载组件、荷载量测组件、变形量测组件、钢管混凝土加劲混合结构。加载组件主要由加载板、加载杆、螺母、预紧碟簧组成；荷载量测组件由力传感器组成；变形量测组件主要由量测装置组成；钢管混凝土加劲混合结构为受力结构。通过发明钢管混凝土加劲混合结构长期加载和量测同步的试验装置，实现了内置钢管混凝土和外包钢筋混凝土的分阶段加载和长期内力、变形的同步测量，解决了分阶段施工情况下内置钢管混凝土部分和外包钢筋混凝土部分的内力、变形无法精准分析的关键问题，可为进一步研究该类结构在长期荷载下的内力重分布规律和变形发展规律提供可靠的试验结果。

Description

一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置 技术领域
本发明属于结构工程技术领域，具体涉及一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置。
 背景技术
钢管混凝土加劲混合结构作为一种新型工程结构，具有承载力高，抗震性能好，结构稳定，耐腐蚀性好等多方面优点，被广泛地用于桥梁工程建设之中。但在长期荷载作用下，混凝土因其本身的材料特性，会发生显著的徐变效应。对大跨径拱桥而言，混凝土的徐变会导致结构内力重分布，对结构的受力产生非线性影响，严重影响结构的受力和变形，这将对工程带来安全隐患。
针对钢管混凝土加劲混合结构，现在常用的的加载量测装置如王庆利等在“研究钢管砼轴压构件在荷载与腐蚀下性能的装置与方法”中的加载装置，往往只能对整个钢管混凝土加劲混合结构全截面一次性加载，不能够做到对钢管混凝土加劲混合结构核心钢管混凝土部分和外围钢筋混凝土部分的分阶段加载，导致对该结构分阶段施工工况下的力学性能研究受限。
本发明提供一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置，通过该试验装置，可以实现对内置钢管混凝土部分和外包钢筋混凝土部分的分阶段加载，并能对各部分结构的内力、变形进行长期同步测量，解决了现有加载装置对分阶段施工情况下钢管内置混凝土和外包钢筋混凝土内力、变形无法准确区分的问题，可以为进一步研究该类结构在长期荷载下的内力重分布规律和变形发展规律提供技术支撑。
 技术问题
本发明提出一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置。以往的加载装置往往把钢管混凝土加劲混合结构作为一个整体进行加载，很少考虑该类结构分阶段施工、承载的特点，将内置钢管混凝土部分和整个结构分阶段加载量测。本发明拟解决现有钢管混凝土加劲混合结构加载和量测技术中的问题，将内置钢管混凝土部分和整个结构分两个阶段进行加载，并分别量测出内置钢管混凝土部分和外围钢筋混凝土部分的受力状况，对其进行独立的受力分析，分别得到各部分混凝土的徐变情况，为实际工程科学计算分析提供依据。
 技术解决方案
一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置，包括加载组件10、荷载量测组件20、变形量测组件30和钢管混凝土加劲混合结构40；
加载组件10包括上加载板101、下加载板102、轮辐传感器垫板103、轮辐传感器嵌套板104、下加载杆105、上加载杆106、下部螺母107、中部螺母108、上部螺母109、下部碟簧110、中部碟簧111和上部碟簧112；上加载杆106穿过上加载板101，其端部通过上部螺母109和上部碟簧112配合固定在上加载板101上；下加载杆105依次穿过轮辐传感器嵌套板104、下加载板102，其端部通过下部螺母107和下部碟簧110配合固定在下加载板102上，其中下部通过中部螺母108和中部碟簧111配合固定在轮辐传感器嵌套板104上；轮辐传感器嵌套板104开有中心孔，轮辐传感器垫板103一端伸入至轮辐传感器嵌套板104的中心孔内，轮辐传感器嵌套板104中心孔内壁与轮辐传感器垫板103外壁之间留有一定缝隙，且轮辐传感器嵌套板104的端部与轮辐传感器垫板103表面在同一平面上；轮辐传感器垫板103另一端位于下加载板102上；
至少四个上加载杆106、四个下加载杆105、四个上部螺母109、四个下部螺母107、四个上部碟簧112、四个下部碟簧110与上加载板101、轮辐传感器垫板103、下加载板102一起形成钢管混凝土加劲混合结构40内部钢管混凝土的加载结构；至少四个上加载杆106、四个下加载杆105、四个上部螺母109、四个中部螺母108、四个上部碟簧112、四个中部碟簧111与上加载板101、轮辐传感器嵌套板104一起形成钢管混凝土加劲混合结构40外围钢筋混凝土的加载结构；其中，上加载杆106、下加载杆105、上部螺母109、上部碟簧112、上加载板101为与钢管混凝土加劲混合结构40内部钢管混凝土的加载结构的共用部分；
荷载量测组件20包括拉力传感器 21和轮辐式压力传感器22，拉力传感器 21两头分别与下加载杆105、上加载杆106相连，用于量测钢管混凝土加劲混合结构40的荷载；轮辐式压力传感器22安装在轮辐传感器垫板103上，用于量测钢管混凝土的荷载；
变形量测组件30包括位移计31、位移计下支座32、位移计上支座33、拉丝34和多个应变片；至少两个位移计31和五个应变片一起联合组成钢管混凝土加劲混合结构40的变形量测体系；位移计31通过位移计上支座33和位移计下支座32连接于上加载板101、下加载板104之间，应变片粘接于钢管混凝土加劲混合结构40的内部和表面；
钢管混凝土加劲混合结构40包括钢管41、钢管内混凝土42、钢管外混凝土43、纵筋44和箍筋45，为试验装置的加载和量测对象，在加载组件10的结构框架中几何对中安装；其中钢管41和钢管内混凝土42组成钢管混凝土，钢管外混凝土43、纵筋44和箍筋45组成外围钢筋混凝土。
进一步，所述轮辐传感器垫板103的截面与钢管混凝土的截面形状相同，面积相等。
进一步，所述轮辐传感器垫板103设有螺纹柱并与荷载量测组件20中轮辐式压力传感器22的螺纹孔连接。
进一步，所述轮辐传感器垫板103的高度通过下部螺母107和下加载板102进行调节，实现加载全过程中轮辐传感器嵌套板104与轮辐传感器垫板103保持在同一平面上。
进一步，在钢管混凝土加劲混合结构40浇筑时，钢管41的截面、钢管外混凝土43的形状均不限。
进一步，所述的应变片包括混凝土应变片35、钢管横向应变片36、钢管纵向应变片37、纵筋应变片38和箍筋应变片39。
一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置的安装方法，具体步骤如下：
步骤一：如图5-①，在上加载板101的几何中心位置焊接钢管41；
步骤二：如图5-②，焊接好后，从钢管41的另一端浇筑钢管内混凝土42；
步骤三：如图5-③，将四套上部碟簧112、上部螺母109、上加载杆106依次安装至上加载板101四个角对应的开孔处；
步骤四：如图5-④，在上加载杆106的另一端连接拉力传感器 21的一端，并在拉力传感器 21的另一端连接下加载杆105；
步骤五：如图5-⑤，在钢管41和钢管内混凝土42的另一端粘接轮辐传感器垫板103，将轮辐传感器嵌套板104套入下加载杆105上；
步骤六：如图5-⑥，在轮辐传感器嵌套板104的外部依次将中部碟簧111、中部螺母108安装在下加载杆105上，并将轮辐式压力传感器22与轮辐传感器垫板103连接牢固；
步骤七：如图5-⑦，将下加载板102安装到下加载杆105的端部，并在下加载板102的外部依次安装下部碟簧110、下部螺母107；将整个装置翻转，使下加载板102在最下面，上加载板101在最上面；在钢管41的中部粘贴上钢管横向应变片36、钢管纵向应变片37，在轮辐传感器垫板103与轮辐传感器嵌套板104之间的缝隙填充发泡胶50；
步骤八：如图5-⑦，通过调整四个中部螺母108、下部螺母107，保证轮辐传感器嵌套板104和下加载板102水平，从而保证轮辐式压力传感器22的底面和轮辐传感器垫板103水平，使钢管混凝土与外围钢筋混凝土处于同一平面；所受轴向荷载恒定通过依次对角拧紧四个上部螺母109的方式进行加载，保证四个拉力传感器 21的荷载相同，加载至轮辐式压力传感器22的荷载值达到设计荷载时停止加载；长期持荷过程中通过轮辐式压力传感器22持续量测钢管混凝土的内力，因混凝土徐变而导致内力降低时，及时拧紧四个上部螺母109以补充荷载；
步骤九：如图5-⑧，将纵筋44的两端沿钢管41的方向分别固定到上加载板101和轮辐传感器嵌套板104上，并将箍筋45绑扎在纵筋44的周围；
步骤十：如图5-⑨，在纵筋44和箍筋45的相应位置粘贴纵筋应变片38和箍筋应变片39，量测钢筋应变；之后在外围浇筑钢管外混凝土43，便浇筑成钢管混凝土加劲混合结构40，通过位移计下支座32、位移计上支座33、拉丝34将位移计31安装到上加载板101和轮辐传感器嵌套板104之间，量测钢管混凝土加劲混合结构40轴向压缩变形；形成钢管混凝土加劲混合结构长期加载和量测同步的试验装置；
步骤十一：如图5-⑨，通过调整四个中部螺母108，使轮辐传感器嵌套板104的上表面与钢管内混凝土42的下端面相平，通过依次对角拧紧四个上部螺母109的方式进行加载，保证四个拉力传感器 21所受的荷载相同，加载至四个拉力传感器 21的荷载值之和达到设计荷载时停止加载，长期持荷过程中因混凝土徐变而导致内力降低时，及时拧紧四个上部螺母109以补充荷载。
 有益效果
本发明的有益效果如下：提供了一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置的制作与安装方法，通过合理的布置加载组件和量测组件，能够很好地单独给钢管混凝土部分、整个钢管混凝土加劲混合结构部分施加荷载，并能独立地量测出钢管混凝土、整个钢管混凝土加劲混合结构的荷载及变形，能够有效地对钢管混凝土加劲混合结构40的荷载、变形进行分析。
 附图说明
图1是本发明提供的钢管混凝土加劲混合结构构件的加载组件拼装示意图；
图2是本发明提供的钢管混凝土加劲混合结构构件的荷载量测组件拼装示意图；
图3-(a)是本发明提供的钢管混凝土加劲混合结构构件的变形量测组件拼装示意图；
图3-(b)是本发明提供的钢管混凝土加劲混合结构构件的变形量测组件处于钢管外混凝土内部部分的示意图；
图4是本发明提供的钢管混凝土加劲混合结构构件的示意图；
图5-①是实施例中本发明提供的试验装置的安装流程中焊接钢管示意图；
图5-②是实施例中本发明提供的试验装置的安装流程中浇筑钢管内混凝土示意图；
图5-③是实施例中本发明提供的试验装置的安装流程中安装上加载板示意图；
图5-④是实施例中本发明提供的试验装置的安装流程中安装拉力传感器示意图；
图5-⑤是实施例中本发明提供的试验装置的安装流程中安装轮辐传感器垫板和轮辐传感器嵌套板示意图；
图5-⑥是实施例中本发明提供的试验装置的安装流程中安装轮辐式压力传感器示意图；
图5-⑦是实施例中本发明提供的试验装置的安装流程中安装下加载板及对钢管混凝土部分加载示意图；
图5-⑧是实施例中本发明提供的试验装置的安装流程中安装钢筋骨架示意图；
图5-⑨是实施例中本发明提供的试验装置的安装流程中浇筑钢管外混凝土及对钢管混凝土加劲混合结构整体加载示意图；
图6-(a)是实施例中通过本发明提供的试验装置得到的应变发展数据图。
图6-(b)是实施例中通过本发明提供的试验装置得到的结构内力发展数据图。
图中：10加载组件；101上加载板；102下加载板；103轮辐传感器垫板；104轮辐传感器嵌套板；105下加载杆；106上加载杆；107下部螺母；108中部螺母；109上部螺母；110下部碟簧；111中部碟簧；112上部碟簧；20荷载量测组件；21拉力传感器；22轮辐式压力传感器；30变形量测组件；31位移计；32位移计下支座；33位移计上支座；34拉丝；35混凝土纵向应变片；36钢管横向应变片；37钢管纵向应变片；38纵筋应变片；39箍筋应变片；40钢管混凝土加劲混合结构；41钢管；42钢管内混凝土；43钢管外混凝土；44纵筋；45箍筋；50发泡胶。
 本发明的实施方式
以下结合本发明实施例中的附图，对本发明实施例中的技术方案进行进一步的说明。以某钢管混凝土劲性骨架外包钢筋混凝土大跨拱桥为例，为了研究施工荷载对该结构力学性能的影响规律，需要借助本发明的装置对钢管混凝土加劲混合结构构件进行阶段性长期荷载试验，下面以该实例为例进行说明。
实施例
（1）实例描述
如图1，加载组件10被拆卸为若干子加载板件、子加载杆件，子加载螺母、子预紧碟簧，可以实现分别加工和运输，提升了工作效率。加载组件10根据钢管混凝土加劲混合结构40的几何及承载大小等方面进行设计拼接，本实施例中，如图4所示，钢管混凝土加劲混合结构40的钢管为圆钢管，其直径D为89mm，厚度t为4.5mm，外围混凝土为正方形，其边长B为222mm，构件长度方向为等截面，长度L为666mm，构件配有12根直径为8mm的纵筋44，沿纵筋44方向均匀布置14根直径为6mm的箍筋45，构件的混凝土保护层厚度为10mm，结合钢管内混凝土42和钢管外混凝土43的强度计算出构件的承载力 N u 为2241kN。本实例中两个阶段对钢管混凝土加劲混合结构构件施加的长期荷载比分别为 N L 1=0.15、 N L 2=0.2。
（2）试验装置设计与制作
根据此构件对钢管混凝土加劲混合结构长期加载和量测同步的试验装置进行设计：如图1所示，上加载板101、下加载板102、轮辐传感器嵌套板104外形均为边长465mm的正方形，在正方形的四个角靠近边缘60mm的位置各开一个直径为38mm的圆孔；轮辐传感器垫板103与钢管混凝土部分相对应，直径为89mm，轮辐传感器嵌套板104几何中心开孔直径为91mm，轮辐传感器嵌套板104中心孔内壁与轮辐传感器垫板103外壁之间的距离为0~2mm；下加载杆105和上加载杆106为直径为36mm的螺杆，加载杆件与加载板件四个角开孔内边缘的距离为0~2mm，使用与加载螺杆相配套的螺母和碟簧；上加载板101、下加载板102、轮辐传感器垫板103、轮辐传感器嵌套板104的厚度均为30mm；轮辐传感器嵌套板104与轮辐传感器垫板103之间的缝隙在浇筑钢管外混凝土43之前通过发泡胶50进行填充；如图3所示钢管外混凝土43的钢骨架由12根直径8mm的纵筋44和14箍直径6mm的箍筋45构成，纵筋44通过焊接与加载板件连接，箍筋45通过扎丝绑在纵筋44的外围。根据本专利中提出的钢管混凝土加劲混合结构长期加载和量测同步的试验装置制作步骤，制作出试验装置。
（3）在发明的试验装置中制作钢管混凝土加劲混合结构
如图5所示，将钢管41与上加载板101焊接，将钢管41的另一端开口向上浇筑钢管内混凝土42，形成钢管混凝土模块；养护结束后通过加载组件10对钢管混凝土部分试件荷载，一段时间后，通过螺母、螺杆将下加载板102、轮辐传感器垫板103、轮辐传感器嵌套板104安装到相应位置，并将发泡胶50填充于轮辐传感器垫板103和轮辐传感器嵌套板104之间形成钢管外混凝土43的上下模板模块；将纵筋44连接于上加载板101和轮辐传感器嵌套板104之间，并在纵筋44周围困扎箍筋45形成钢管外混凝土43的钢筋骨架；将定制的钢管外混凝土43的侧面模板焊接在上加载板101和轮辐传感器嵌套板104之间形成钢管外混凝土的模板；将整个加载装置水平放置，将钢管外混凝土43的钢模板开口朝上，浇筑钢管外混凝土43，形成钢管混凝土加劲混合结构40。
以上介绍的在本发明的装置里制作钢管混凝土加劲混合结构40的方法，用以解决科研研究中无法实现的现场浇筑钢管混凝土加劲混合结构40的先浇筑钢管内混凝土42部分，在钢管内混凝土42承受荷载的状态下再浇筑钢管外混凝土43的分阶段长期浇筑过程，使科研研究更加符合实际工程，使科研结果更具有真实性、准确性。
（4）基于发明的试验装置对钢管混凝土加劲混合结构分阶段加载
对钢管混凝土加劲混合结构40分阶段加载：将浇筑完钢管内混凝土42的钢管混凝土结构安装入本发明提供的钢管混凝土加劲混合结构长期加载和量测同步的试验装置；将钢管横向应变片36、钢管纵向应变片37粘贴至钢管41中部位置的表面；将四个中部螺母108调整到同一水平面上，保证轮辐传感器嵌套板104水平；将位移计31通过位移计下支座32、位移计上支座33、拉丝34安装至上加载板101和轮辐传感器嵌套板104之间；将四个下部螺母107调整到同一水平面上，保证下加载板102水平，从而保证轮辐式压力传感器22的底面水平、轮辐传感器垫板103水平，进而保证钢管混凝土结构受轴向荷载；将拉力传感器21、轮辐式压力传感器22的荷载在未施加荷载的状态下进行清零；如图5-⑦将四个上部螺母109通过对角依次拧紧的方式进行加载，保证四个拉力传感器21所受的荷载相同，加载至轮辐式压力传感器22的荷载值达到设计荷载时停止加载，便完成了单独对钢管混凝土部分施加荷载的过程。
将四个中部螺母108调平，并调整轮辐传感器嵌套板104的高度，使轮辐传感器嵌套板104的上表面与钢管内混凝土42的下端面相平；将纵筋44焊接在上加载板101和轮辐传感器嵌套板104之间，在纵筋44周围绑扎箍筋45形成钢管外混凝土43的钢筋笼，并在钢筋骨架外面设计位置处固定钢管外混凝土43的模板，浇筑钢管外混凝土43并养护；如图5-⑨将四个上部螺母109通过对角依次拧紧的方式进行加载，保证四个拉力传感器21所受的荷载相同，加载至四个拉力传感器21的荷载值之和达到设计荷载时停止加载，便完成了对钢管混凝土加劲混合结构40整体施加荷载的过程。
在两阶段长期荷载作用下，本实例中试验装置对构件的徐变和荷载的实测结果如下图， t 1表示第一阶段单独对钢管混凝土部分施加长期荷载阶段， t 2表示第二阶段浇筑钢管外混凝土后，对整个钢管混凝土加劲混合结构40施加长期荷载阶段。试验结果表明，本发明装置能够采集结构在整个受力过程中的徐变变形，并能实现同步且独立地采集钢管混凝土部分和外围钢筋混凝土部分的内力。
以上介绍的对钢管混凝土加劲混合结构40的分阶段加载方法，用以解决内置钢管混凝土部分和外包钢筋混凝土部分内力无法准确区分的科学难题，为进一步研究该类结构在长期荷载下的内力重分布规律和变形发展规律提供了可靠的试验结果。

Claims (7)

  1. 一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置，其特征在于，该试验装置包括加载组件（10）、荷载量测组件（20）、变形量测组件（30）和钢管混凝土加劲混合结构（40）；
    加载组件（10）包括上加载板（101）、下加载板（102）、轮辐传感器垫板（103）、轮辐传感器嵌套板（104）、下加载杆（105）、上加载杆（106）、下部螺母（107）、中部螺母（108）、上部螺母（109）、下部碟簧（110）、中部碟簧（111）和上部碟簧（112）；上加载杆（106）穿过上加载板（101），其端部通过上部螺母（109）和上部碟簧（112）配合固定在上加载板（101）上；下加载杆（105）依次穿过轮辐传感器嵌套板（104）、下加载板（102），其端部通过下部螺母（107）和下部碟簧（110）配合固定在下加载板（102）上，其中下部通过中部螺母（108）和中部碟簧（111）配合固定在轮辐传感器嵌套板（104）上；轮辐传感器嵌套板（104）开有中心孔，轮辐传感器垫板（103）一端伸入至轮辐传感器嵌套板（104）的中心孔内，轮辐传感器嵌套板（104）中心孔内壁与轮辐传感器垫板（103）外壁之间留有一定缝隙，且轮辐传感器嵌套板（104）的端部与轮辐传感器垫板（103）表面在同一平面上；轮辐传感器垫板（103）另一端位于下加载板（102）上；
    至少四个上加载杆（106）、四个下加载杆（105）、四个上部螺母（109）、四个下部螺母（107）、四个上部碟簧（112）、四个下部碟簧（110）与上加载板（101）、轮辐传感器垫板（103）、下加载板（102）一起形成钢管混凝土加劲混合结构（40）内部钢管混凝土的加载结构；至少四个上加载杆（106）、四个下加载杆（105）、四个上部螺母（109）、四个中部螺母（108）、四个上部碟簧（112）、四个中部碟簧（111）与上加载板（101）、轮辐传感器嵌套板（104）一起形成钢管混凝土加劲混合结构（40）外围钢筋混凝土的加载结构；其中，上加载杆（106）、下加载杆（105）、上部螺母（109）、上部碟簧（112）、上加载板（101）为与钢管混凝土加劲混合结构（40）内部钢管混凝土的加载结构的共用部分；
    荷载量测组件（20）包括拉力传感器（ 21）和轮辐式压力传感器（22），拉力传感器（ 21）两头分别与下加载杆（105）、上加载杆（106）相连，用于量测钢管混凝土加劲混合结构（40）的荷载；轮辐式压力传感器（22）安装在轮辐传感器垫板（103）上，用于量测钢管混凝土的荷载；
    变形量测组件（30）包括位移计（31）、位移计下支座（32）、位移计上支座（33）、拉丝（34）和多个应变片；至少两个位移计（31）和五个应变片一起联合组成钢管混凝土加劲混合结构（40）的变形量测体系；位移计（31）通过位移计上支座（33）和位移计下支座（32）连接于上加载板（101）、下加载板104之间，应变片粘接于钢管混凝土加劲混合结构（40）的内部和表面；
    钢管混凝土加劲混合结构（40）包括钢管（41）、钢管内混凝土（42）、钢管外混凝土（43）、纵筋（44）和箍筋（45），为试验装置的加载和量测对象，在加载组件（10）的结构框架中几何对中安装；其中钢管（41）和钢管内混凝土（42）组成钢管混凝土，钢管外混凝土（43）、纵筋（44）和箍筋（45）组成外围钢筋混凝土。
  2. 根据权利要求1所述的钢管混凝土加劲混合结构长期加载和量测同步的试验装置，其特征在于，所述轮辐传感器垫板（103）的截面与钢管混凝土的截面形状相同，面积相等。
  3. 根据权利要求1所述的钢管混凝土加劲混合结构长期加载和量测同步的试验装置，其特征在于，所述轮辐传感器垫板（103）设有螺纹柱并与荷载量测组件（20）中轮辐式压力传感器（22）的螺纹孔连接。
  4. 根据权利要求1所述的钢管混凝土加劲混合结构长期加载和量测同步的试验装置，其特征在于，所述轮辐传感器垫板（103）的高度通过下部螺母（107）和下加载板（102）进行调节，实现加载全过程中轮辐传感器嵌套板（104）与轮辐传感器垫板（103）保持在同一平面上。
  5. 根据权利要求1所述的钢管混凝土加劲混合结构长期加载和量测同步的试验装置，其特征在于，在钢管混凝土加劲混合结构（40）浇筑时，钢管（41）的截面、钢管外混凝土（43）的形状均不限。
  6. 根据权利要求1所述的钢管混凝土加劲混合结构长期加载和量测同步的试验装置，其特征在于，所述的应变片包括混凝土应变片（35）、钢管横向应变片（36）、钢管纵向应变片（37）、纵筋应变片（38）和箍筋应变片（39）。
  7. 一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置的安装方法，其特征在于，具体步骤如下：
    步骤一：在上加载板（101）的几何中心位置焊接钢管（41）；
    步骤二：焊接好后，从钢管（41）的另一端浇筑钢管内混凝土（42）；
    步骤三：将四套上部碟簧（112）、上部螺母（109）、上加载杆（106）依次安装至上加载板（101）四个角对应的开孔处；
    步骤四：在上加载杆（106）的另一端连接拉力传感器（ 21）的一端，并在拉力传感器（ 21）的另一端连接下加载杆（105）；
    步骤五：在钢管（41）和钢管内混凝土（42）的另一端粘接轮辐传感器垫板（103），将轮辐传感器嵌套板（104）套入下加载杆（105）上；
    步骤六：在轮辐传感器嵌套板（104）的外部依次将中部碟簧（111）、中部螺母（108）安装在下加载杆（105）上，并将轮辐式压力传感器（22）与轮辐传感器垫板（103）连接牢固；
    步骤七：将下加载板（102）安装到下加载杆（105）的端部，并在下加载板（102）的外部依次安装下部碟簧（110）、下部螺母（107）；将整个装置翻转，使下加载板（102）在最下面，上加载板（101）在最上面；在钢管（41）的中部粘贴上钢管横向应变片（36）、钢管纵向应变片（37），在轮辐传感器垫板（103）与轮辐传感器嵌套板（104）之间的缝隙填充发泡胶（50）；
    步骤八：通过调整四个中部螺母（108）、下部螺母（107），保证轮辐传感器嵌套板（104）和下加载板（102）水平，从而保证轮辐式压力传感器（22）的底面和轮辐传感器垫板（103）水平，使钢管混凝土与外围钢筋混凝土处于同一平面；所受轴向荷载恒定通过依次对角拧紧四个上部螺母（109）的方式进行加载，保证四个拉力传感器（ 21）的荷载相同，加载至轮辐式压力传感器（22）的荷载值达到设计荷载时停止加载；长期持荷过程中通过轮辐式压力传感器（22）持续量测钢管混凝土的内力，因混凝土徐变而导致内力降低时，及时拧紧四个上部螺母（109）以补充荷载；
    步骤九：将纵筋（44）的两端沿钢管（41）的方向分别固定到上加载板（101）和轮辐传感器嵌套板（104）上，并将箍筋（45）绑扎在纵筋（44）的周围；
    步骤十：在纵筋（44）和箍筋（45）的相应位置粘贴纵筋应变片（38）和箍筋应变片（39），量测钢筋应变；之后在外围浇筑钢管外混凝土（43），便浇筑成钢管混凝土加劲混合结构（40），通过位移计下支座（32）、位移计上支座（33）、拉丝（34）将位移计（31）安装到上加载板（101）和轮辐传感器嵌套板（104）之间，量测钢管混凝土加劲混合结构（40）轴向压缩变形；形成钢管混凝土加劲混合结构长期加载和量测同步的试验装置；
    步骤十一：通过调整四个中部螺母（108），使轮辐传感器嵌套板（104）的上表面与钢管内混凝土（42）的下端面相平，通过依次对角拧紧四个上部螺母（109）的方式进行加载，保证四个拉力传感器（ 21）所受的荷载相同，加载至四个拉力传感器（ 21）的荷载值之和达到设计荷载时停止加载，长期持荷过程中因混凝土徐变而导致内力降低时，及时拧紧四个上部螺母（109）以补充荷载。
PCT/CN2023/105505 2023-07-03 2023-07-03 一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置 Ceased WO2025007239A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US18/280,090 US20250130148A1 (en) 2023-07-03 2023-07-03 An experimental device for long-term loading and synchronized measurement of the concrete-encased concrete-filled steel tube structure
PCT/CN2023/105505 WO2025007239A1 (zh) 2023-07-03 2023-07-03 一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/105505 WO2025007239A1 (zh) 2023-07-03 2023-07-03 一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置

Publications (1)

Publication Number Publication Date
WO2025007239A1 true WO2025007239A1 (zh) 2025-01-09

Family

ID=94171076

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/105505 Ceased WO2025007239A1 (zh) 2023-07-03 2023-07-03 一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置

Country Status (2)

Country Link
US (1) US20250130148A1 (zh)
WO (1) WO2025007239A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2004116047A (ru) * 2004-05-25 2005-11-10 Вологодский государственный технический университет (RU) Способ неразрушающего контроля несущей способности железобетонных конструкций
CN102998174A (zh) * 2011-09-09 2013-03-27 中交四航工程研究院有限公司 混凝土试件耐久性试验长期加载装置系统
CN108426772A (zh) * 2018-04-26 2018-08-21 福州大学 实现钢管与混凝土初期同时受荷加载的试验装置及其方法
CN114486500A (zh) * 2022-02-25 2022-05-13 哈尔滨工业大学 适用于多种应力组合的混凝土徐变试验装置及其试验方法
CN115014973A (zh) * 2022-04-20 2022-09-06 中冶检测认证有限公司 一种测定混凝土双轴徐变的试验装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2004116047A (ru) * 2004-05-25 2005-11-10 Вологодский государственный технический университет (RU) Способ неразрушающего контроля несущей способности железобетонных конструкций
CN102998174A (zh) * 2011-09-09 2013-03-27 中交四航工程研究院有限公司 混凝土试件耐久性试验长期加载装置系统
CN108426772A (zh) * 2018-04-26 2018-08-21 福州大学 实现钢管与混凝土初期同时受荷加载的试验装置及其方法
CN114486500A (zh) * 2022-02-25 2022-05-13 哈尔滨工业大学 适用于多种应力组合的混凝土徐变试验装置及其试验方法
CN115014973A (zh) * 2022-04-20 2022-09-06 中冶检测认证有限公司 一种测定混凝土双轴徐变的试验装置

Also Published As

Publication number Publication date
US20250130148A1 (en) 2025-04-24

Similar Documents

Publication Publication Date Title
CN101122159B (zh) 一种施加预应力的钢管整体桁架及其施工方法
CN113684926B (zh) 一种干式全装配工业化混凝土主次梁节点的施工工艺
CN107525726A (zh) 框架结构梁板柱节点斜向加载装置
CN108760495B (zh) 弱刚度筋材双向受拉粘结试验装置及测试方法
Zhu et al. Experimental and analytical investigation on precast concrete-encased concrete-filled steel tube column-to-column dry connections under axial tension
CN109811665A (zh) 装配式重型钢牛腿的安装方法
CN110398429A (zh) 一种考虑施工过程影响的钢管混凝土抗震性能试验装置及试验方法
CN115417290A (zh) 钢衬里模块施工方法、吊装工装及限位工装
CN110487715A (zh) 一种高延性水泥基材料单纤维拔出试验装置及试验方法
CN207181186U (zh) 框架结构梁板柱节点斜向加载装置
Sun et al. Experimental verification of vertical joints in an innovative prefabricated structural wall system
CN109374413A (zh) 适用于钢筋混凝土梁承载力的现场检测装置及其设置方法
CN115127996B (zh) 一种钢管混凝土界面粘结滑移的试验装置及方法
Sun et al. Progressive failure of precast shear wall structure for RC composite column confined uniform hollow panels under cyclic loading
WO2025007239A1 (zh) 一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置
CN114808704A (zh) 一种异形塔柱的钢混结合段的施工方法
CN116973221B (zh) 一种钢管混凝土加劲混合结构长期加载和量测同步的试验装置
CN222716027U (zh) 一种外露式钢柱的柱脚结构
CN222140314U (zh) 一种建筑隔震层摩擦摆支座安装装置
CN108507866B (zh) 弱刚度筋材双向受拉粘结试验的试件测量结构及组装方法
CN208206650U (zh) 弱刚度筋材双向受拉粘结试验的试件测量结构
CN110887647A (zh) 一种薄壁离心混凝土钢管塔补强的方法
CN113155732B (zh) 高强钢绞线网增强ecc与混凝土界面性能测试方法
CN112100846B (zh) 一种钢架构钢柱形变损坏在线智能预警方法
CN212000592U (zh) 一种无铰钢桁拱与拱座的连接结构

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23943973

Country of ref document: EP

Kind code of ref document: A1

WWP Wipo information: published in national office

Ref document number: 18280090

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE