Pseudo-static Test of Vehicle Load on New Type of Penetrating Abutment Slab Connection Structure

2020 ◽  
Vol 29 (8) ◽  
Author(s):  
Li Dong ◽  
Yi Zhang ◽  
Songhui Li
Keyword(s):  
Static Test ◽  
Vehicle Load ◽  
New Type

Strain Analysis of Composite Frame Joints with Double Side Penetrated Diaphragms

2012 ◽  
Vol 166-169 ◽  
pp. 3277-3281
Author(s):  
Min Tong
Keyword(s):  
Stress Distribution ◽  
Strain Analysis ◽  
Steel Tube ◽  
Core Region ◽  
Steel Beam ◽  
Static Test ◽  
The Core ◽  
Composite Frame ◽  
Joint Connection ◽  
New Type

Abstract. Connection joint with penetrated diaphragm, which is better for the stressing state of the welding connection, is a new type joint for the beam and column connection. Static test and pseudo-static test are put to 17 crossing joints. The stress distribution of the steel beam and the penetrated diaphragm are discussed. The experiment shows that the penetrated diaphragm transfer most tension force of the steel beam’s upper flange to the core region of the joint, which could effectively decrease the stress and strain gradient within the connection area of the steel beam’s upper flange and steel tube column. As the result, the shear force of the core region is decreased. The front weld is avoided being surfing great tension. The ductility of the joint and the energy dissipation capacity of the structure are then increased. The type and the size of the penetrated diaphragm show great affection to the stress distribution of steel beam and penetrated diaphragm. The study achievement enriches the joint connection type of the composite structure with concrete- filled steel tube.

scholarly journals Experimental Study and Numerical Simulation on Mechanical Properties of the Bottom Plate in the Assembled Composite Slab with Additional Steel Trusses

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Xiuying Yang ◽  
Yuzhuo Wang ◽  
Yongxin Liu ◽  
Zhenyu Wei
Keyword(s):  
Crack Resistance ◽  
Limit State ◽  
Load Level ◽  
Bottom Plate ◽  
Composite Slab ◽  
Static Test ◽  
Service Limit State ◽  
New Type ◽  
Transverse Steel ◽  
Steel Trusses

The composite slab with steel trusses is composed of precast bottom plate and cast-in-place concrete. In engineering applications, cracks often appear in the bottom plate before casting the upper concrete, which even leads to the failure of the composite slab. To improve the crack resistance of the slab, a composite slab with additional steel trusses is proposed; that is, on the basis of the original longitudinal steel trusses, the transverse steel trusses are added. Static test and numerical analysis were carried out on the bottom plate of the new type of composite slab with the additional transverse steel trusses. The experimental and analytical results show that the load level of the plate with additional steel trusses can be increased by 33% under the normal service limit state; the deflection of the plate is significantly reduced and the crack development is effectively controlled, which illustrates that the new type of composite slab can improve the bearing capacity, increase the bending stiffness, and enhance the crack resistance effectively.

Experimental Study on Bearing Behavior of Large-Diameter Overlength Squeezed Branch Pile

2011 ◽  
Vol 243-249 ◽  
pp. 3244-3250
Author(s):  
Jin Lu Jia ◽  
Zhong Fu Wang ◽  
Jian Hua Zheng
Keyword(s):  
Bearing Capacity ◽  
Large Diameter ◽  
Load Ratio ◽  
The Body ◽  
Static Test ◽  
Force Transfer ◽  
Side Resistance ◽  
New Type ◽  
S Curve ◽  
Vertical Bearing

Squeezed branch pile is based on the traditional uniform pile in development of a new type of pile, with a high bearing capacity, settlement of small features widely used in the engineering. Based on the actual project site static test, analyzed the vertical bearing capacity characteristics of two adjacent squeezed branch piles; By means of testing of the pile stress gauge steel embedded in different parts of piles, the axial force transfer characteristics of the body, support plate side resistance drag and play characteristics of the squeezed branch pile were analyzed. The results showed that: the branch pile Q-S curve is slowly varying type, the three branch share of the load ratio increases with the pile top load increases and then decreases, load sharing ratio of 12% or so. The side resistance increased with the pile top displacement, the curve showed significant enhancement traits. Measured friction value of two test piles is too conservative under the existing norms, the actual measured value of 1.2～1.6 times of the standardized value.

The Static Test Study on Anchors of CFRP Cables

2013 ◽  
Vol 671-674 ◽  
pp. 1635-1640
Author(s):  
Kui Hua Mei ◽  
Zhi Tao Lv ◽  
Ji Wen Zhang
Keyword(s):  
Shear Strength ◽  
Bond Strength ◽  
Compression Strength ◽  
Lateral Compression ◽  
Static Tests ◽  
Static Test ◽  
Bond Type ◽  
Cable Stayed Bridge ◽  
Test Study ◽  
New Type

The axial performance of CFRP is excellent, while the lateral compression strength and shear strength are low, thus they can’t be anchored by traditional anchors. A new type of adhesive anchor was designed and five experimental cables were fabricated and the static tests were carried out. In the tests, the tensile capacity, bond strength and pullout behavior of CFRP cables anchors filled with resin were discussed. The efficiency coefficients and the load-slip behaviors of the bond-type anchors and the uniformities of the stresses in the tendons were studied. Several conclusions are drawn which have become powerful evidences for using the bond-type anchors in the first cable stayed bridge with CFRP cables in China.

scholarly journals Experimental Research on Seismic Performance of a New-Type of R/C Beam-Column Joints with End Plates

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Shufeng Li ◽  
Qingning Li ◽  
Haotian Jiang ◽  
Hao Zhang ◽  
Lizhong Zhang
Keyword(s):  
Seismic Performance ◽  
Plastic Hinge ◽  
High Strength ◽  
Frame Structure ◽  
Static Test ◽  
Hysteresis Curves ◽  
The Core ◽  
New Type ◽  
Plate Connections ◽  
Beam Plastic Hinge

This paper presents a new-type of fabricated beam-column connections with end plates. The joint details are as follows: the concrete beams are connected to column by end plates and six high strength long bolts passing through the core area. In addition, in order to increase the stiffness and shear strength, stirrups are replaced by the steel plate hoop in the core zone. To examine the fail behavior of the fabricated beam-column connection specimens, a quasi-static test is conducted for nine full-scale models to obtain the hysteresis curves, skeleton curves, ductility, energy dissipation capacity, and other seismic indicators. The experimental results show that all specimens failed in bending in a malleable way with a beam plastic hinge and the hysteresis curves are excellently plump for the end plate connections. From the seismic indexes, the fabricated connection specimens exhibit better seismic performance, which can provide reference for the application of prefabricated frame structure in the earthquake area.

Behaviour of the joint between slabs and walls composed of light steel and foam concrete

2021 ◽  
pp. 136943322110032
Author(s):  
Dianzhong Liu ◽  
Han Liu ◽  
Feipeng Zhang
Keyword(s):  
Finite Element ◽  
Composite Structures ◽  
Failure Process ◽  
Displacement Curve ◽  
Element Analysis ◽  
Static Test ◽  
The Finite Element Analysis ◽  
New Type ◽  
Load Displacement ◽  
Wall System

Aiming at the prefabricated composite structure, a new type of interior joint in the prefabricated slab wall system suitable for light steel-concrete composite structures is proposed. In the paper, the pseudo-static test of the joint was designed and carried out, and its failure pattern was mainly described. In addition, the test data was analysed from the perspectives of load-displacement curve, strength, stiffness, ductility and energy dissipation. The finite element analysis software ABAQUS was used to carry out finite element modelling and calculation of the new joint, and the results were compared and analysed in terms of failure process and load-displacement curve analysis. The results show that it is feasible to apply the joints in this new type of slab wall system to light steel concrete composite structures.

Experimental study on wheel-spoke crossed cable structures

2018 ◽  
Vol 21 (15) ◽  
pp. 2340-2355
Author(s):  
Zongyu Hu ◽  
Jun Wang ◽  
Jida Zhao ◽  
Yiyi Chen
Keyword(s):  
Finite Element ◽  
Structural Parameters ◽  
Test Results ◽  
Element Analysis ◽  
Static Test ◽  
Cable Structure ◽  
Vertical Displacements ◽  
Static Performance ◽  
New Type ◽  
Internal Forces

Wheel-spoke crossed cable structure is a new type of cable-strut structure. In this article, the tension forming and static performance of wheel-spoke crossed cable structure are experimentally investigated by testing four scale models under full-span and half-span downward uniform load, and the effect of structural parameters including variable prestress level, height difference between inner ring and outer ring, and layer height of inner ring is studied by finite element method as well. The test results indicate that radial cables tensioning scheme is effective for wheel-spoke crossed cable structure to reach initial prestress state, and wheel-spoke crossed cable structure possesses excellent load-carrying capacity and structural stiffness since internal forces and vertical displacements of models vary almost linearly under such load cases. Moreover, the static test results are in good agreement with the finite element analysis results, confirming that the model design, measurement methods, and loading schemes are reasonable. Therefore, the results of this study can provide valuable reference for the design and application of wheel-spoke crossed cable structure.

scholarly journals Vehicle wheel load estimation with fiber optical contact patch elongation measurement

2021 ◽  
Author(s):  
Alex Coiret ◽  
Martin Fontaine ◽  
Julien Cesbron ◽  
Vincent Baltazart ◽  
David Betaille ◽  
...  
Keyword(s):  
Relevant Information ◽  
Contact Length ◽  
Load Estimation ◽  
Heavy Vehicles ◽  
Wheel Load ◽  
Static Test ◽  
Contact Patch ◽  
Vehicle Load ◽  
Continuous Estimation ◽  
Efficient Verification

Load estimation of wheels, especially for heavy vehicles, is of importance for several reasons. First safety imposes to respect loading limits for a given tire, but the variety of road infrastructures or bridges passed by a vehicle are defining constraints of larger scales as structure resistance or pavement durability. Moreover, multiple-wheels load estimation may be an efficient verification mean of the loading uniformity of goods inside a heavy vehicle. All these reasons are justifying the interest for a continuous estimation of load for each wheel. In this context, this work aims at contributing to the development of an intelligent tire solution, able to estimate the loading applied on a wheel from the elongation measurement of the tire-to-road contact patch. As a first step of proof of concept, without regarding durability, this measurement has been done with a tire instrumented with a longitudinal, circumferential optical fiber. Measurement on a static test wheel has shown the relevance of the method to detect slight elongation of the contact patch, surrounded by compression of nearby tire areas. The Distributed Optic Fiber (DOF) measurement, widely used in the structural health monitoring domain (SHM), has been related to the force applied to the wheel, by a near linear relation, on the experienced domain of 70 mm to 110 mm for the contact length and 1.1 to 2.6 kN for the vertically applied force. As a result, demonstration is done that an intelligent tire could provide a relevant information on a given wheel load of a vehicle. The optimization of the experimental setup should lead to a robust system, usable continuously on heavy vehicles, to detect harmful loading displacements or to qualify adequacy between vehicle load and road infrastructure capacity.

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