Static load test analysis of prestressed concrete hollow slab considering the combined action of guardrail and deck pavement
QIN Bingbing
SHENG Yueyue
GUO Bin
Abstract：To address the issue of inconsistency between theoretical calculation models and the actual stress state of bridges during static load tests,experimental data are collected from a prestressed concrete hollow slab bridge under the loading vehicle's action in both load and offset load conditions.These data are compared and analyzed against the theoretical results calculated from three models:bare beam model A,model B considering only the bridge deck pavement,and model C considering both the bridge deck pavement and the guardrails.The results indicate:Under static load conditions,the measured deflection and strain of the bridge are both less than the theoretical calculation results from all three models;however,model A's displacement and strain correction factors are overall too low,which may lead to misjudgment of the bridge's actual load-bearing state,while model B's correction factor is less than that of model C;under offset loading,in the transverse direction of the bridge,the theoretical midspan deflection of models A and B is inconsistent with the measured deflection trend,while model C's theoretical midspan deflection aligns with the measured midspan deflection trend,with the maximum deflection located at slab 4#;compared with models A and B,model C's calculated neutral axis of the edge beam is consistent with the measured neutral axis of the edge beam;due to the joint effect of the guardrail and bridge deck pavement on the beam-slab system,model C better reflects the actual stress state of the bridge structure.
Keywords：prestressed concrete hollow slabstatic load testbridge deck pavement and guard railcombined actioncalculation model
Publication Date：2025-03-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：11( 110-119,130 )